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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.3874 Advisory (icsa) Siemens Products 12 November 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: SENTRON powermanager Climatix POL909 NX OBJ Translator Nucleus RTOS-based APOGEE and TALON Products SCALANCE W1750D Mendix Studio Pro Mendix SIMATIC WinCC Publisher: ICS-CERT Operating System: Network Appliance Windows Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Increased Privileges -- Existing Account Modify Arbitrary Files -- Remote with User Interaction Denial of Service -- Remote/Unauthenticated Access Confidential Data -- Remote/Unauthenticated Provide Misleading Information -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2021-42026 CVE-2021-42025 CVE-2021-42015 CVE-2021-41538 CVE-2021-41535 CVE-2021-40366 CVE-2021-40364 CVE-2021-40359 CVE-2021-40358 CVE-2021-37735 CVE-2021-37734 CVE-2021-37732 CVE-2021-37730 CVE-2021-37727 CVE-2021-37726 CVE-2021-37207 CVE-2021-31890 CVE-2021-31889 CVE-2021-31888 CVE-2021-31887 CVE-2021-31886 CVE-2021-31885 CVE-2021-31884 CVE-2021-31883 CVE-2021-31882 CVE-2021-31881 CVE-2021-31346 CVE-2021-31345 CVE-2021-31344 Reference: ESB-2021.3833 ESB-2021.3454 Original Bulletin: https://us-cert.cisa.gov/ics/advisories/icsa-21-315-10 https://us-cert.cisa.gov/ics/advisories/icsa-21-315-09 https://us-cert.cisa.gov/ics/advisories/icsa-21-315-08 https://us-cert.cisa.gov/ics/advisories/icsa-21-315-07 https://us-cert.cisa.gov/ics/advisories/icsa-21-315-06 https://us-cert.cisa.gov/ics/advisories/icsa-21-315-05 https://us-cert.cisa.gov/ics/advisories/icsa-21-315-04 https://us-cert.cisa.gov/ics/advisories/icsa-21-315-03 Comment: This bulletin contains eight (8) ICS-CERT security advisories. - --------------------------BEGIN INCLUDED TEXT-------------------- ICS Advisory (ICSA-21-315-10) Siemens SENTRON powermanager Original release date: November 11, 2021 Legal Notice All information products included in https://us-cert.cisa.gov/ics are provided "as is" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained within. DHS does not endorse any commercial product or service, referenced in this product or otherwise. Further dissemination of this product is governed by the Traffic Light Protocol (TLP) marking in the header. For more information about TLP, see https://us-cert.cisa.gov/tlp/ . 1. EXECUTIVE SUMMARY o CVSS v3 7.8 o ATTENTION: Low attack complexity o Vendor: Siemens o Equipment: SENTRON powermanager o Vulnerability: Incorrect Permission Assignment for Critical Resource 2. RISK EVALUATION Successful exploitation of this vulnerability could allow an authenticated local attacker to inject arbitrary code and escalate privileges. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following versions of Siemens SENTRON powermanager, a power monitoring software to analyze energy consumption, are affected: o SENTRON powermanager Version 3: All versions 3.2 VULNERABILITY OVERVIEW 3.2.1 INCORRECT PERMISSION ASSIGNMENT FOR CRITICAL RESOURCE CWE-732 The affected application assigns improper access rights to a specific folder containing configuration files. CVE-2021-37207 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been assigned; the CVSS vector string is ( AV:L/AC:L/PR:L/UI:N/S:U/C:H/ I:H/A:H ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: Germany 3.4 RESEARCHER Noam Moshe of Claroty reported this vulnerability to Siemens. 4. MITIGATIONS Siemens has released a security patch for SENTRON powermanager v3.6 HF1 and recommends updating to the latest version. Siemens recommends users also harden the application server to prevent local access by untrusted personnel. As a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens' operational guidelines for industrial security , and to follow the recommendations in the product manuals. Additional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity For more information about this issue and the mitigations, please see Siemens security advisory SSA-537983 CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should: o Ensure the least-privilege user principle is followed. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. CISA also provides a section for control systems security recommended practices on the ICS webpage on us-cert.cisa.gov . Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies . Additional mitigation guidance and recommended practices are publicly available on the ICS webpage on us-cert.cisa.gov in the Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies . Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to CISA for tracking and correlation against other incidents. No known public exploits specifically target this vulnerability. This vulnerability is not exploitable remotely. For any questions related to this report, please contact the CISA at: Email: CISAservicedesk@cisa.dhs.gov Toll Free: 1-888-282-0870 CISA continuously strives to improve its products and services. You can help by choosing one of the links below to provide feedback about this product. - -------------------------------------------------------------------------------- ICS Advisory (ICSA-21-315-09) Siemens Climatix POL909 Original release date: November 11, 2021 Legal Notice All information products included in https://us-cert.cisa.gov/ics are provided "as is" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained within. DHS does not endorse any commercial product or service, referenced in this product or otherwise. Further dissemination of this product is governed by the Traffic Light Protocol (TLP) marking in the header. For more information about TLP, see https://us-cert.cisa.gov/tlp/ . 1. EXECUTIVE SUMMARY o CVSS v3 6.4 o ATTENTION: Exploitable remotely o Vendor: Siemens o Equipment: Climatix POL909 (AWM module) o Vulnerability: Missing Encryption of Sensitive Data 2. RISK EVALUATION Successful exploitation of this vulnerability could allow sensitive data disclosure or modification of data in transit. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following versions of Climatix POL909 (AWM module), an advanced web module, are affected: o Climatix POL909 (AWM module): All versions prior to v11.34 3.2 VULNERABILITY OVERVIEW 3.2.1 MISSING ENCRYPTION OF SENSITIVE DATA CWE-311 The web server of affected devices transmits data without TLS encryption. This could allow an unauthenticated remote attacker in a man-in-the-middle position to read sensitive data, such as administrator credentials, or modify data in transit. CVE-2021-40366 has been assigned to this vulnerability. A CVSS v3 base score of 6.4 has been assigned; the CVSS vector string is ( AV:N/AC:H/PR:N/UI:R/S:U/C:H/ I:L/A:L ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: Germany 3.4 RESEARCHER Siemens reported this vulnerability to CISA. 4. MITIGATIONS Siemens recommends users update to v11.34 or later version. Siemens has not identified any additional specific workarounds or mitigations. As a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens' operational guidelines for industrial security , and follow the recommendations in the product manuals. Additional information on industrial security by Siemens can be found at: https://www.siemens.com/industrialsecurity For additional information, please refer to Siemens Security Advisory SSA-703715 CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should: o Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet . o Locate control system networks and remote devices behind firewalls, and isolate them from the business network. o When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing that VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize that VPN is only as secure as the connected devices. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. CISA also provides a section for control systems security recommended practices on the ICS webpage on us-cert.cisa.gov . Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies . Additional mitigation guidance and recommended practices are publicly available on the ICS webpage on us-cert.cisa.gov in the Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies . Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to CISA for tracking and correlation against other incidents. No known public exploits specifically target this vulnerability. This vulnerability has a high attack complexity. For any questions related to this report, please contact the CISA at: Email: CISAservicedesk@cisa.dhs.gov Toll Free: 1-888-282-0870 CISA continuously strives to improve its products and services. You can help by choosing one of the links below to provide feedback about this product. - -------------------------------------------------------------------------------- ICS Advisory (ICSA-21-315-08) Siemens NX OBJ Translator Original release date: November 11, 2021 Legal Notice All information products included in https://us-cert.cisa.gov/ics are provided "as is" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained within. DHS does not endorse any commercial product or service, referenced in this product or otherwise. Further dissemination of this product is governed by the Traffic Light Protocol (TLP) marking in the header. For more information about TLP, see https://us-cert.cisa.gov/tlp/ . 1. EXECUTIVE SUMMARY o CVSS v3 7.8 o ATTENTION: low attack complexity o Vendor: Siemens o Equipment: NX o Vulnerabilities: Use After Free, Access of Uninitialized Pointer 2. RISK EVALUATION Successful exploitation of these vulnerabilities could lead to an access violation and arbitrary code execution on the target system. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS Siemens reports these vulnerabilities affects the following NX products: o NX 1953 Series: All versions prior to v1973.3700 o NX 1980 Series: All versions prior to v1988 3.2 VULNERABILITY OVERVIEW 3.2.1 USE AFTER FREE CWE-416 The affected application contains a use-after-free vulnerability while parsing OBJ files. An attacker could leverage this vulnerability to execute code in the context of the current process. CVE-2021-41535 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U/ C:H/I:H/A:H ). 3.2.2 ACCESS OF UNINITIALIZED POINTER CWE-824 The affected application is vulnerable to information disclosure by unexpected access to an uninitialized pointer while parsing user-supplied OBJ files. An attacker could leverage this vulnerability to leak information from memory locations. CVE-2021-41538 has been assigned to this vulnerability. A CVSS v3 base score of 3.3 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U/ C:L/I:N/A:N ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: Germany 3.4 RESEARCHER xina1i working, with Trend Micro's Zero Day Initiative, reported these vulnerabilities to Siemens and CISA. 4. MITIGATIONS Siemens has released updates for the NX and recommends updating to the latest version. o NX 1953 Series: Update to v1973.3700 or later version o NX 1980 Series: Update to v1988 or later version Siemens recommends users avoid opening of untrusted files from unknown sources. As a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens' operational guidelines for industrial security and following the recommendations in the product manuals. For more information about this issue, please see Siemens security advisory SSA-328042 CISA also recommends users take the following measures to protect themselves from social engineering attacks: o Do not click web links or open unsolicited attachments in email messages. o Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams. o Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. CISA also provides a section for control systems security recommended practices on the ICS webpage on us-cert.cisa.gov . Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies . Additional mitigation guidance and recommended practices are publicly available on the ICS webpage on us-cert.cisa.gov in the Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies . Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to CISA for tracking and correlation against other incidents. No known public exploits specifically target these vulnerabilities. These vulnerabilities are not exploitable remotely. For any questions related to this report, please contact the CISA at: Email: CISAservicedesk@cisa.dhs.gov Toll Free: 1-888-282-0870 CISA continuously strives to improve its products and services. You can help by choosing one of the links below to provide feedback about this product. - -------------------------------------------------------------------------------- ICS Advisory (ICSA-21-315-07) Siemens Nucleus RTOS-based APOGEE and TALON Products Original release date: November 11, 2021 Legal Notice All information products included in https://us-cert.cisa.gov/ics are provided "as is" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained within. DHS does not endorse any commercial product or service, referenced in this product or otherwise. Further dissemination of this product is governed by the Traffic Light Protocol (TLP) marking in the header. For more information about TLP, see https://us-cert.cisa.gov/tlp/ . 1. EXECUTIVE SUMMARY o CVSS v3 9.8 o ATTENTION: Exploitable remotely/low attack complexity o Vendor: Siemens o Equipment: Nucleus RTOS based APOGEE and TALON Products o Vulnerabilities: Type Confusion, Improper Validation of Specified Quantity in Input, Out-of-bounds Read, Improper Restriction of Operations within the Bounds of a Memory Buffer, Improper Null Termination, Buffer Access with Incorrect Length Value, Integer Underflow, Improper Handling of Inconsistent Structural Elements 2. RISK EVALUATION Successful exploitation of these vulnerabilities could allow denial-of-service conditions, remote code execution, information leaks, and out-of-bounds reads and writes. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following Nucleus RTOS based APOGEE and TALON Products, direct digital control (DDC) devices, are affected: o APOGEE MBC (PPC) (BACnet): All versions o APOGEE MBC (PPC) (P2 Ethernet): All versions o APOGEE MEC (PPC) (BACnet): All versions o APOGEE MEC (PPC) (P2 Ethernet): All versions o APOGEE PXC Compact (BACnet): All versions o APOGEE PXC Compact (P2 Ethernet): All versions o APOGEE PXC Modular (BACnet): All versions o APOGEE PXC Modular (P2 Ethernet): All versions o TALON TC Compact (BACnet): All versions o TALON TC Modular (BACnet): All versions 3.2 VULNERABILITY OVERVIEW 3.2.1 ACCESS OF RESOURCE USING INCOMPATIBLE TYPE ('TYPE CONFUSION') CWE-843 ICMP echo packets with fake IP options allow sending ICMP echo reply messages to arbitrary hosts on the network. CVE-2021-31344 has been assigned to this vulnerability. A CVSS v3 base score of 5.3 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/C:N/ I:L/A:N ). 3.2.2 IMPROPER VALIDATION OF SPECIFIED QUANTITY IN INPUT CWE-1284 The total length of an UDP payload (set in the IP header) is unchecked. This may lead to various side effects, including information leaks, depending on a user-defined application that runs on top of the UDP protocol. CVE-2021-31345 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/C:H/ I:N/A:N ). 3.2.3 IMPROPER VALIDATION OF SPECIFIED QUANTITY IN INPUT CWE-1284 The total length of an ICMP payload (set in the IP header) is unchecked. This may lead to various side effects, including information leaks and denial-of-service conditions, depending on the network buffer organization in memory. CVE-2021-31346 has been assigned to this vulnerability. A CVSS v3 base score of 8.2 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/C:L/ I:N/A:H ). 3.2.4 OUT-OF-BOUNDS READ CWE-125 When processing a DHCP OFFER message, the DHCP client application does not validate the length of the Vendor option(s), leading to denial-of-service conditions. CVE-2021-31881 has been assigned to this vulnerability. A CVSS v3 base score of 7.1 has been assigned; the CVSS vector string is ( AV:A/AC:L/PR:N/UI:N/S:U/C:L/ I:N/A:H ). 3.2.5 IMPROPER RESTRICTION OF OPERATIONS WITHIN THE BOUNDS CWE-119 The DHCP client application does not validate the length of the Domain Name Server IP option(s) (0x06) when processing DHCP ACK packets. This may lead to denial-of-service conditions. CVE-2021-31882 has been assigned to this vulnerability. A CVSS v3 base score of 6.5 has been assigned; the CVSS vector string is ( AV:A/AC:L/PR:N/UI:N/S:U/C:N/ I:N/A:H ). 3.2.6 IMPROPER RESTRICTION OF OPERATIONS WITHIN THE BOUNDS CWE-119 When processing a DHCP ACK message, the DHCP client application does not validate the length of the Vendor option(s), leading to denial-of-service conditions. CVE-2021-31883 has been assigned to this vulnerability. A CVSS v3 base score of 7.1 has been assigned; the CVSS vector string is ( AV:A/AC:L/PR:N/UI:N/S:U/C:L/ I:N/A:H ). 3.2.7 IMPROPER NULL TERMINATION CWE-170 The DHCP client application assumes the data supplied with the "Hostname" DHCP option is NULL terminated. In cases when global hostname variable is not defined, this may lead to out-of-bound reads, writes, and denial-of-service conditions. CVE-2021-31884 has been assigned to this vulnerability. A CVSS v3 base score of 8.8 has been assigned; the CVSS vector string is ( AV:A/AC:L/PR:N/UI:N/S:U/C:H/ I:H/A:H ). 3.2.8 BUFFER ACCESS WITH INCORRECT LENGTH VALUE CWE-805 TFTP server application allows for reading the contents of the TFTP memory buffer via sending malformed TFTP commands. CVE-2021-31885 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/C:H/ I:N/A:N ). 3.2.9 IMPROPER NULL TERMINATION CWE-170 FTP server does not properly validate the length of the "USER" command, leading to stack-based buffer overflows. This may result in denial-of-service conditions and remote code execution. CVE-2021-31886 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/C:H/ I:H/A:H ). 3.2.10 IMPROPER NULL TERMINATION CWE-170 FTP server does not properly validate the length of the "PWD/XPWD" command, leading to stack-based buffer overflows. This may result in denial-of-service conditions and remote code execution. CVE-2021-31887 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/C:H/ I:H/A:H ). 3.2.11 IMPROPER NULL TERMINATION CWE-170 FTP server does not properly validate the length of the "MKD/XMKD" command, leading to stack-based buffer overflows. This may result in denial-of-service conditions and remote code execution. CVE-2021-31888 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/C:H/ I:H/A:H ). 3.2.12 INTEGER UNDERFLOW (WRAP OR WRAPAROUND) CWE-191 Malformed TCP packets with a corrupted SACK option leads to denial-of-service conditions. CVE-2021-31889 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/C:N/ I:N/A:H ). 3.2.13 IMPROPER HANDLING OF INCONSISTENT STRUCTURAL ELEMENTS CWE-240 The total length of an TCP payload (set in the IP header) is unchecked. This may lead to various side effects, including denial-of-service conditions, depending on the network buffer organization in memory. CVE-2021-31890 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/C:N/ I:N/A:H ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: Germany 3.4 RESEARCHER Siemens reported these vulnerabilities to CISA. 4. MITIGATIONS Siemens has identified and recommended the following specific workarounds and mitigations users can apply to reduce the risk: o Restrict system access to authorized personnel and follow a least privilege approach. o Disable the DHCP client and use static IP address configuration instead. o Protect network access to the affected devices with appropriate measures, (e.g., firewalls) to reduce the risk. o Disable FTP on all devices. o Apply appropriate strategies for mitigation on the network level to ensure affected devices are as segmented. o Ensure default passwords are changed. o Implement defense in depth concepts to mitigate risk of an attacker gaining access to affected devices and networks. o Contact a Siemens office for support. As a general security measure Siemens strongly recommends protecting network access to affected products with appropriate mechanisms. It is advised to follow recommended security practices to run the devices in a protected IT environment. For more information see Siemens Security Advisory SSA-114589 CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should: o Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet . o Locate control system networks and remote devices behind firewalls, and isolate them from the business network. o When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as its connected devices. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. CISA also provides a section for control systems security recommended practices on the ICS webpage on us-cert.cisa.gov . Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies . Additional mitigation guidance and recommended practices are publicly available on the ICS webpage on us-cert.cisa.gov in the Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies . Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to CISA for tracking and correlation against other incidents. No known public exploits specifically target these vulnerabilities. For any questions related to this report, please contact the CISA at: Email: CISAservicedesk@cisa.dhs.gov Toll Free: 1-888-282-0870 CISA continuously strives to improve its products and services. You can help by choosing one of the links below to provide feedback about this product. - -------------------------------------------------------------------------------- ICS Advisory (ICSA-21-315-06) Siemens SCALANCE W1750D Original release date: November 11, 2021 Legal Notice All information products included in https://us-cert.cisa.gov/ics are provided "as is" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained within. DHS does not endorse any commercial product or service, referenced in this product or otherwise. Further dissemination of this product is governed by the Traffic Light Protocol (TLP) marking in the header. For more information about TLP, see https://us-cert.cisa.gov/tlp/ . 1. EXECUTIVE SUMMARY o CVSS v3 9.8 o ATTENTION: Exploitable remotely/low attack complexity o Vendor: Siemens o Equipment: SCALANCE W1750D o Vulnerabilities: Improper Restriction of Operations Within the Bounds of a Memory Buffer, Command Injection, Path Traversal 2. RISK EVALUATION Successful exploitation of these vulnerabilities could allow an attacker to execute code on the affected devices, read arbitrary files, or create a denial-of-service condition. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following versions of SCALANCE W1750D, a wireless access point, are affected: o SCALANCE W1750D: All versions prior to v8.7.1.3 o SCALANCE W1750D: Versions 8.7.1.3 and newer (only affected by CVE-2021-37727, CVE-2021-37730, and CVE-2021-37734) 3.2 VULNERABILITY OVERVIEW 3.2.1 IMPROPER RESTRICTION OF OPERATIONS WITHIN THE BOUNDS OF A MEMORY BUFFER CWE-119 A remote buffer overflow vulnerability was discovered in HPE Aruba Instant (IAP). Successful exploitation could allow for unauthenticated remote code execution, potentially resulting in the execution of arbitrary code as a privileged user on the underlying system. CVE-2021-37726 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/C:H/ I:H/A:H ). 3.2.2 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN A COMMAND ('COMMAND INJECTION') CWE-77 A remote arbitrary command execution vulnerability was discovered in HPE Aruba Instant (IAP) command line interface. Successful exploitation could result in the ability to execute arbitrary commands as a privileged user on the underlying OS, potentially compromising the system. CVE-2021-37727 has been assigned to this vulnerability. A CVSS v3 base score of 7.2 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:H/UI:N/S:U/C:H/ I:H/A:H ). 3.2.3 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN A COMMAND ('COMMAND INJECTION') CWE-77 A remote arbitrary command execution vulnerability was discovered in HPE Aruba Instant (IAP) command line interface. Successful exploitation could result in the ability to execute arbitrary commands as a privileged user on the underlying OS, potentially compromising the system. CVE-2021-37730 has been assigned to this vulnerability. A CVSS v3 base score of 7.2 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:H/UI:N/S:U/C:H/ I:H/A:H ). 3.2.4 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN A COMMAND ('COMMAND INJECTION') CWE-77 A remote arbitrary command execution vulnerability was discovered in HPE Aruba Instant (IAP) web-based management user interface. Successful exploitation could result in the ability to execute arbitrary commands as a privileged user on the underlying OS, potentially compromising the system. CVE-2021-37732 has been assigned to this vulnerability. A CVSS v3 base score of 7.2 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:H/UI:N/S:U/C:H/ I:H/A:H ). 3.2.5 IMPROPER LIMITATION OF A PATHNAME TO A RESTRICTED DIRECTORY ('PATH TRAVERSAL') CWE-22 An authenticated arbitrary file read access vulnerability was discovered in Aruba Instant Access Points. Successful exploitation could lead to an attacker reading any file off the underlying filesystem, including system sensitive files. CVE-2021-37734 has been assigned to this vulnerability. A CVSS v3 base score of 4.9 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:H/UI:N/S:U/C:H/ I:N/A:N ). 3.2.6 IMPROPER LIMITATION OF A PATHNAME TO A RESTRICTED DIRECTORY ('PATH TRAVERSAL') CWE-22 A remote denial of service vulnerability was discovered in Aruba Instant through the command line interface. Successful exploitation could create a denial-of-service condition, leading to a temporary loss of service until the next reboot. CVE-2021-37735 has been assigned to this vulnerability. A CVSS v3 base score of 4.9 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:H/UI:N/S:U/C:N/ I:N/A:H ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Multiple Sectors o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: Germany 3.4 RESEARCHER Siemens reported these vulnerabilities to CISA. 4. MITIGATIONS Siemens recommends upgrading their products to the latest version: o SCALANCE W1750D: Update to v8.7.1.3 or later. Siemens has identified the following specific workarounds and mitigations users can apply to reduce the risk: o Block access to the Aruba Instant Command Line Interface from all untrusted users. o Block access to the Aruba Instant web-based management interface from all untrusted users. o Enable the Enhanced PAPI Security feature, where available, to prevent exploitation of these vulnerabilities. For assistance from the Siemens Technical Assistance Center (TAC), please contact Siemens (login required). o Block access for Aruba Instant device on Port UDP/8211 from all untrusted users. As a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends configuring the environment according to the Siemens operational guidelines for Industrial Security and following the recommendations in the product manuals. For additional information, please refer to Siemens Security Advisory SSA-917476 CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should: o Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet . o Locate control system networks and remote devices behind firewalls, and isolate them from the business network. o When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as its connected devices. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. CISA also provides a section for control systems security recommended practices on the ICS webpage on us-cert.cisa.gov . Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies . Additional mitigation guidance and recommended practices are publicly available on the ICS webpage on us-cert.cisa.gov in the Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies . Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to CISA for tracking and correlation against other incidents. No known public exploits specifically target these vulnerabilities. For any questions related to this report, please contact the CISA at: Email: CISAservicedesk@cisa.dhs.gov Toll Free: 1-888-282-0870 CISA continuously strives to improve its products and services. You can help by choosing one of the links below to provide feedback about this product. - -------------------------------------------------------------------------------- ICS Advisory (ICSA-21-315-05) Siemens Mendix Studio Pro Original release date: November 11, 2021 Legal Notice All information products included in https://us-cert.cisa.gov/ics are provided "as is" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained within. DHS does not endorse any commercial product or service, referenced in this product or otherwise. Further dissemination of this product is governed by the Traffic Light Protocol (TLP) marking in the header. For more information about TLP, see https://us-cert.cisa.gov/tlp/ . 1. EXECUTIVE SUMMARY o CVSS v3 5.3 o ATTENTION: Exploitable remotely o Vendor: Siemens o Equipment: Mendix Studio Pro o Vulnerabilities: Incorrect Authorization 2. RISK EVALUATION Successful exploitation of these vulnerabilities could allow authenticated attackers to manipulate the content of specific objects or to retrieve a specific attribute of arbitrary objects. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS Siemens reports these vulnerabilities affect the following Mendix products: o Mendix Applications using Mendix 8: All versions prior to v8.18.13 o Mendix Applications using Mendix 9: All versions prior to v9.6.2 3.2 VULNERABILITY OVERVIEW 3.2.1 INCORRECT AUTHORIZATION CWE-863 Applications built with affected versions of Mendix Studio Pro do not properly control write access for certain client actions. This could allow authenticated attackers to manipulate the content of specific objects regardless of whether they have write access. CVE-2021-42025 has been assigned to this vulnerability. A CVSS v3 base score of 5.3 has been calculated; the CVSS vector string is ( AV:N/AC:H/PR:L/UI:N/S:U/ C:N/I:H/A:N ). 3.2.2 INCORRECT AUTHORIZATION CWE-863 Applications built with affected versions of Mendix Studio Pro do not properly control read access for certain client actions. This could allow authenticated attackers to retrieve specific attributes of arbitrary objects, regardless of whether they have read access. CVE-2021-42026 has been assigned to this vulnerability. A CVSS v3 base score of 3.1 has been calculated; the CVSS vector string is ( AV:N/AC:H/PR:L/UI:N/S:U/ C:L/I:N/A:N ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: Germany 3.4 RESEARCHER Siemens reported these vulnerabilities to CISA. 4. MITIGATIONS Mendix has released updates for the affected product lines and recommends updating to the latest versions and redeploying the applications. o Mendix Applications using Mendix 8: Update to v8.18.13 or later version and redeploy the application. o Mendix Applications using Mendix 9: Update to v9.6.2 or v9.7.0 or later version and redeploy the application. Siemens has identified the following specific workarounds and mitigations users can apply to reduce the risk: o In applications built with affected versions of Mendix Studio Pro, avoid using file documents that contain sensitive information. As a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens' operational guidelines for Industrial Security , and following the recommendations in the product manuals. For more information about these vulnerabilities, please see Siemens security advisory SSA-779699 CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should: o Ensure the least-privilege user principle is followed. o Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet . o Locate control system networks and remote devices behind firewalls, and isolate them from the business network. o When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as its connected devices. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. CISA also provides a section for control systems security recommended practices on the ICS webpage on us-cert.cisa.gov . Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies . Additional mitigation guidance and recommended practices are publicly available on the ICS webpage on us-cert.cisa.gov in the Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies . Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to CISA for tracking and correlation against other incidents. No known public exploits specifically target these vulnerabilities. These vulnerabilities have a high attack complexity. For any questions related to this report, please contact the CISA at: Email: CISAservicedesk@cisa.dhs.gov Toll Free: 1-888-282-0870 CISA continuously strives to improve its products and services. You can help by choosing one of the links below to provide feedback about this product. - -------------------------------------------------------------------------------- ICS Advisory (ICSA-21-315-04) Siemens Mendix Original release date: November 11, 2021 Legal Notice All information products included in https://us-cert.cisa.gov/ics are provided "as is" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained within. DHS does not endorse any commercial product or service, referenced in this product or otherwise. Further dissemination of this product is governed by the Traffic Light Protocol (TLP) marking in the header. For more information about TLP, see https://us-cert.cisa.gov/tlp/ . 1. EXECUTIVE SUMMARY o CVSS v3 4.0 o ATTENTION: Low attack complexity o Vendor: Siemens o Equipment: Mendix o Vulnerability: Use of Web Browser Cache Containing Sensitive Information 2. RISK EVALUATION Successful exploitation of this vulnerability could allow a local attacker to read cached documents by exploring the browser cache. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following versions of Mendix, an application platform, are affected: o Mendix Applications using Mendix 7: All versions prior to v7.23.26 o Mendix Applications using Mendix 8: All versions prior to v8.18.12 o Mendix Applications using Mendix 9: All versions prior to v9.6.1 3.2 VULNERABILITY OVERVIEW 3.2.1 USE OF WEB BROWSER CACHE CONTAINING SENSITIVE INFORMATION CWE-525 Applications built with the affected versions of Mendix Studio Pro do not prevent file documents from being cached when files are opened or downloaded using a browser. This could allow a local attacker to read documents by exploring the browser cache. CVE-2021-42015 has been assigned to this vulnerability. A CVSS v3 base score of 4.0 has been assigned; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:N/S:U/C:L/ I:N/A:N ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Multiple Sectors o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: Germany 3.4 RESEARCHER Casix reported this vulnerability to Siemens. 4. MITIGATIONS Siemens recommends upgrading to the latest version of Mendix: o Mendix Applications using Mendix 7: Update to v7.23.26 or later o Mendix Applications using Mendix 8: Update to v8.18.12 or later o Mendix Applications using Mendix 9: Update to v9.6.1 or v9.7.0 or later Siemens has identified the following specific workarounds and mitigations users can apply to reduce the risk: o Applications built with affected versions of Mendix Studio Pro: avoid using file documents that contain sensitive information As a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends configuring the environment according to the Siemens operational guidelines for Industrial Security and following the recommendations in the product manuals. For additional information, please refer to Siemens Security Advisory SSA-338732 CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should: o Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet . o Locate control system networks and remote devices behind firewalls, and isolate them from the business network. o When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as its connected devices. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. CISA also provides a section for control systems security recommended practices on the ICS webpage on us-cert.cisa.gov . Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies . Additional mitigation guidance and recommended practices are publicly available on the ICS webpage on us-cert.cisa.gov in the Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies . Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to CISA for tracking and correlation against other incidents. No known public exploits specifically target this vulnerability. This vulnerability is not exploitable remotely. For any questions related to this report, please contact the CISA at: Email: CISAservicedesk@cisa.dhs.gov Toll Free: 1-888-282-0870 CISA continuously strives to improve its products and services. You can help by choosing one of the links below to provide feedback about this product. - -------------------------------------------------------------------------------- ICS Advisory (ICSA-21-315-03) Siemens SIMATIC WinCC Original release date: November 11, 2021 Legal Notice All information products included in https://us-cert.cisa.gov/ics are provided "as is" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained within. DHS does not endorse any commercial product or service, referenced in this product or otherwise. Further dissemination of this product is governed by the Traffic Light Protocol (TLP) marking in the header. For more information about TLP, see https://us-cert.cisa.gov/tlp/ . 1. EXECUTIVE SUMMARY o CVSS v3 9.9 o ATTENTION: Exploitable remotely/low attack complexity o Vendor: Siemens o Equipment: SIMATIC WinCC o Vulnerabilities: Path Traversal, Insertion of Sensitive Information into Log File 2. RISK EVALUATION Successful exploitation of these vulnerabilities could allow local attackers to escalate privileges, and read, write, or delete critical files. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS Siemens reports these vulnerabilities affects the following SIMATIC SCADA HMI system products: o SIMATIC PCS 7 v8.2 and earlier: All versions o SIMATIC PCS 7 v9.0: All versions o SIMATIC PCS 7 v9.1: All versions o SIMATIC WinCC v7.4 and earlier: All versions o SIMATIC WinCC v7.5: All versions prior to v7.5 SP2 Update 5 o SIMATIC WinCC v15 and earlier: All versions o SIMATIC WinCC v16: All versions o SIMATIC WinCC v17: All versions 3.2 VULNERABILITY OVERVIEW 3.2.1 IMPROPER LIMITATION OF A PATHNAME TO A RESTRICTED DIRECTORY ('PATH TRAVERSAL') CWE-22 Legitimate file operations of the affected systems do not properly neutralize special elements within the pathname. An attacker could cause the pathname to resolve to a location outside of the restricted directory on the server and read, write, or delete critical files. CVE-2021-40358 has been assigned to this vulnerability. A CVSS v3 base score of 9.9 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:L/UI:N/S:C/ C:H/I:H/A:H ). 3.2.2 IMPROPER LIMITATION OF A PATHNAME TO A RESTRICTED DIRECTORY ('PATH TRAVERSAL') CWE-22 When downloading files, the affected systems do not properly neutralize special elements within the pathname. An attacker could cause the pathname to resolve to a location outside of the restricted directory on the server and read critical files. CVE-2021-40359 has been assigned to this vulnerability. A CVSS v3 base score of 7.7 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:L/UI:N/S:C/ C:H/I:N/A:N ). 3.2.3 INSERTION OF SENSITIVE INFORMATION INTO LOG FILE CWE-532 The affected systems store sensitive information in log files. An attacker with access to the log files could publicly expose the information or reuse it to develop further attacks. CVE-2021-40364 has been assigned to this vulnerability. A CVSS v3 base score of 5.5 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:L/UI:N/S:U/ C:H/I:N/A:N ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: Germany 3.4 RESEARCHER Thomas Riedmaier from Siemens Energy reported these vulnerabilities to Siemens. 4. MITIGATIONS Siemens has released updates for several affected products and recommends updating to the latest versions. Siemens is preparing further updates and recommends specific countermeasures for products where updates are not, or not yet available. o SIMATIC PCS 7 v9.1: Install v7.5 SP2 Update 5 or later version Siemens has identified the following specific workarounds and mitigations users can apply to reduce the risk: o Harden the application's host to prevent local access by untrusted personnel As a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens' operational guidelines for Industrial Security , and follow the recommendations in the product manuals. For more information about this issue, please see Siemens security advisory SSA-840188 CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should: o Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet . o Locate control system networks and remote devices behind firewalls, and isolate them from the business network. o When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as its connected devices. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. CISA also provides a section for control systems security recommended practices on the ICS webpage on us-cert.cisa.gov . Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies . Additional mitigation guidance and recommended practices are publicly available on the ICS webpage on us-cert.cisa.gov in the Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies . Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to CISA for tracking and correlation against other incidents. No known public exploits specifically target these vulnerabilities. For any questions related to this report, please contact the CISA at: Email: CISAservicedesk@cisa.dhs.gov Toll Free: 1-888-282-0870 CISA continuously strives to improve its products and services. You can help by choosing one of the links below to provide feedback about this product. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). 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