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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.1935 Multiple Cisco IOS Software for Cisco Industrial Routers vulnerabilities 4 June 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco IOS Software for Cisco Industrial Routers Publisher: Cisco Systems Operating System: Cisco Impact/Access: Root Compromise -- Remote/Unauthenticated Execute Arbitrary Code/Commands -- Remote/Unauthenticated Denial of Service -- Remote/Unauthenticated Reduced Security -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2020-3258 CVE-2020-3234 CVE-2020-3210 CVE-2020-3205 CVE-2020-3198 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-iot-rce-xYRSeMNH https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-iot-vds-cmd-inj-VfJtqGhE https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-iot-udp-vds-inj-f2D5Jzrt https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-iot-vds-cred-uPMp9zbY Comment: This bulletin contains four (4) Cisco Systems security advisories. - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco IOS Software for Cisco Industrial Routers Arbitrary Code Execution Vulnerabilities Priority: Critical Advisory ID: cisco-sa-ios-iot-rce-xYRSeMNH First Published: 2020 June 3 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvr12083 CSCvr46885 CVE-2020-3198 CVE-2020-3258 CWE-119 CVSS Score: 9.8 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X Summary o Multiple vulnerabilities in Cisco IOS Software for Cisco 809 and 829 Industrial Integrated Services Routers (Industrial ISRs) and Cisco 1000 Series Connected Grid Routers (CGR1000) could allow an unauthenticated, remote attacker or an authenticated, local attacker to execute arbitrary code on an affected system or cause an affected system to crash and reload. For more information about these vulnerabilities, see the Details section of this advisory. Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/ cisco-sa-ios-iot-rce-xYRSeMNH This advisory is part of the June 3, 2020, release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication, which includes 23 Cisco Security Advisories that describe 25 vulnerabilities. For a complete list of the advisories and links to them, see Cisco Event Response: June 2020 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication . Affected Products o Vulnerable Products These vulnerabilities affect the following Cisco products if they are running a vulnerable release of Cisco IOS Software: Cisco 809 and 829 Industrial ISRs CGR1000 For information about which Cisco software releases are vulnerable, see the Fixed Software section of this advisory. Note: Cisco 800 Series Industrial ISRs and Cisco CGR1000 devices are designed on a hypervisor architecture, where Cisco IOS Software, a Guest Operating System (Guest OS), and a Virtual Device Server (VDS) run as separate virtual machines (VMs). Cisco IOS Software and Guest OS need to access some shared devices. Examples are embedded multimedia card (eMMC) flash memory, USB ports, and the console. VDS coordinates access to the shared devices and provides communication channels between VMs over emulated Ethernet interfaces. Cisco IOS Software and VDS perform inter-VM signaling and control operations by establishing a UDP channel on UDP port 9700. Signaling packets are not restricted-they are not processed only when they are sent to internal, local communications between VMs. Instead, an affected system will accept and process signaling packets from any interface of an affected device. The impacts of successful exploitation are described in the Details section of this advisory. Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products section of this advisory are known to be affected by these vulnerabilities. Cisco has confirmed that these vulnerabilities do not affect the following Cisco products: 800 Series ISRs 807 Industrial ISRs IOS XE Software IOS XR Software NX-OS Software Details o Two vulnerabilities in Cisco IOS Software for Cisco 800 Series Industrial ISRs and Cisco CGR1000 could allow an unauthenticated, remote attacker or an authenticated local attacker to execute arbitrary code on an affected system or cause an affected device to crash and reload. These vulnerabilities reside either in the area of code that manages inter-VM signaling or in one of the diagnostic test CLI commands of Cisco IOS Software for the affected products. The vulnerabilities are not dependent on one another; exploitation of one of the vulnerabilities is not required to exploit the other vulnerability. Vulnerability Details Details about the vulnerabilities are as follows. Cisco IOS Software for Cisco Industrial Routers Remote Code Execution Vulnerability A vulnerability in the area of code that manages inter-VM signaling of Cisco IOS Software for Cisco 800 Series Industrial ISRs and Cisco CGR1000 devices could allow an unauthenticated, remote attacker to execute arbitrary code on an affected system or cause an affected system to crash and reload. The vulnerability is due to incorrect bounds checking of certain values in packets that are destined for UDP port 9700 of an affected device. An attacker could exploit this vulnerability by sending malicious packets to an affected device. When the packets are processed, an exploitable buffer overflow condition may occur. A successful exploit could allow the attacker to remotely execute code in the context of the Cisco IOS Software VM that is running on an affected system or cause an affected device to reload. This vulnerability can be exploited by using malicious UDP packets over either IPv4 or IPv6. The malicious packets must be destined to and processed by an affected device; traffic transiting a device will not trigger the vulnerability. Bug ID(s): CSCvr12083 CVE ID: CVE-2020-3198 Security Impact Rating (SIR): Critical CVSS Base Score: 9.8 CVSS Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Mitigation for CVE-2020-3198 There are no workarounds that address this vulnerability. Customers can reduce the attack surface by restricting inbound traffic destined for UDP port 9700 of an affected device by implementing an access control list (ACL) or infrastructure access control list (iACL). This may be a suitable mitigation until affected devices can be upgraded. Information about access lists is in Cisco Guide to Harden Cisco IOS Devices. Information about iACLs is in Protecting Your Core: Infrastructure Protection Access Control Lists . Cisco IOS Software for Cisco Industrial Routers Test CLI Arbitrary Code Execution Vulnerability A vulnerability in one of the diagnostic test CLI commands of Cisco IOS Software for Cisco 800 Series Industrial ISRs and Cisco CGR1000 devices could allow an authenticated, local attacker to execute arbitrary code on an affected device. The attacker must have valid user credentials at privilege level 15. The vulnerability exists because, under specific circumstances, the affected software permits modification of the device's run-time memory. An attacker could exploit this vulnerability by authenticating to the targeted device and issuing a specific diagnostic test command at the CLI. A successful exploit could trigger a logic error in the code that was designed to restrict run-time memory modifications. The attacker could take advantage of this logic error to overwrite system memory locations and execute arbitrary code on an affected device. Bug ID(s): CSCvr46885 CVE ID: CVE-2020-3258 Security Impact Rating (SIR): Medium CVSS Base Score: 5.7 CVSS Vector: CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N Workarounds o There are no workarounds that address these vulnerabilities. Fixed Software o Cisco has released free software updates that address the vulnerabilities described in this advisory. Customers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license: https://www.cisco.com/c/en/us/products/end-user-license-agreement.html Additionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades. When considering software upgrades , customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts page , to determine exposure and a complete upgrade solution. In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers. Customers Without Service Contracts Customers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco TAC: https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html Customers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade. Cisco IOS Software To help customers determine their exposure to vulnerabilities in Cisco IOS Software, Cisco provides the Cisco Software Checker to identify any Cisco Security Advisories that impact a specific Cisco IOS Software release and the earliest release that fixes the vulnerabilities described in each advisory ("First Fixed"). If applicable, the tool also returns the earliest release that fixes all the vulnerabilities described in all the advisories identified ("Combined First Fixed"). Customers can use the Cisco Software Checker to search advisories in the following ways: Choose the software and one or more releases Upload a .txt file that includes a list of specific releases Enter the output of the show version command After initiating a search, customers can customize the search to include all Cisco Security Advisories, a specific advisory, or all advisories in the most recent bundled publication. Customers can use the following form to determine whether a release is affected by any Cisco Security Advisory by entering a Cisco IOS Software release-for example, 15.1(4)M2 : [ ] [Check] By default, the Cisco Software Checker includes results only for vulnerabilities that have a Critical or High Security Impact Rating (SIR). To include results for Medium SIR vulnerabilities, customers can use the Cisco Software Checker on Cisco.com and check the Medium check box in the drop-down list under Impact Rating when customizing a search. Exploitation and Public Announcements o The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory. Source o These vulnerabilities were found during internal security testing by X.B. of the Cisco Advanced Security Initiatives Group (ASIG) and E.I. of Cisco PSIRT. Cisco Security Vulnerability Policy o To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy . This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco. Related to This Advisory o Cisco Event Response: June 2020 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication URL o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/ cisco-sa-ios-iot-rce-xYRSeMNH Revision History o +----------+---------------------------+----------+--------+--------------+ | Version | Description | Section | Status | Date | +----------+---------------------------+----------+--------+--------------+ | 1.0 | Initial public release. | - | Final | 2020-JUN-03 | +----------+---------------------------+----------+--------+--------------+ - -------------------------------------------------------------------------------- Cisco IOS Software for Cisco Industrial Routers Virtual Device Server CLI Command Injection Vulnerability Priority: High Advisory ID: cisco-sa-ios-iot-vds-cmd-inj-VfJtqGhE First Published: 2020 June 3 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvq87451 CSCvr18056 CVE-2020-3210 CWE-77 CVSS Score: 6.7 AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X Summary o A vulnerability in the CLI parsers of Cisco IOS Software for Cisco 809 and 829 Industrial Integrated Services Routers (Industrial ISRs) and Cisco 1000 Series Connected Grid Routers (CGR1000) could allow an authenticated, local attacker to execute arbitrary shell commands on the Virtual Device Server (VDS) of an affected device. The attacker must have valid user credentials at privilege level 15. The vulnerability is due to insufficient validation of arguments that are passed to specific VDS-related CLI commands. An attacker could exploit this vulnerability by authenticating to the targeted device and including malicious input as the argument of an affected command. A successful exploit could allow the attacker to execute arbitrary commands in the context of the Linux shell of VDS with the privileges of the root user. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/ cisco-sa-ios-iot-vds-cmd-inj-VfJtqGhE This advisory is part of the June 3, 2020, release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication, which includes 23 Cisco Security Advisories that describe 25 vulnerabilities. For a complete list of the advisories and links to them, see Cisco Event Response: June 2020 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication . Affected Products o Vulnerable Products This vulnerability affects the following Cisco products if they are running a vulnerable release of Cisco IOS Software: Cisco 809 and 829 Industrial ISRs CGR1000 For information about which Cisco software releases are vulnerable, see the Fixed Software section of this advisory. Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability. Cisco has confirmed that this vulnerability does not affect the following Cisco products: 800 Series ISRs 807 Industrial ISRs IOS XE Software IOS XR Software NX-OS Software Details o Cisco 800 Series Industrial ISRs and Cisco CGR1000 devices are designed on a hypervisor architecture, where Cisco IOS Software, a Guest Operating System (Guest OS), and VDS run as separate virtual machines (VMs). Cisco IOS Software and Guest OS need to access some shared devices. Examples are embedded multimedia card eMMC flash memory, USB ports, and the console. VDS coordinates access to the shared devices and provides communication channels between VMs over emulated Ethernet interfaces. Exploitation of this vulnerability could allow the attacker to gain full control of VDS and therefore compromise the system completely, including compromise of the Cisco IOS Software VM and the Guest OS VM. Workarounds o There are no workarounds that address this vulnerability. Fixed Software o Cisco has released free software updates that address the vulnerability described in this advisory. Customers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license: https://www.cisco.com/c/en/us/products/end-user-license-agreement.html Additionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades. When considering software upgrades , customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts page , to determine exposure and a complete upgrade solution. In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers. Customers Without Service Contracts Customers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco TAC: https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html Customers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade. Cisco IOS Software To help customers determine their exposure to vulnerabilities in Cisco IOS Software, Cisco provides the Cisco Software Checker to identify any Cisco Security Advisories that impact a specific Cisco IOS Software release and the earliest release that fixes the vulnerabilities described in each advisory ("First Fixed"). If applicable, the tool also returns the earliest release that fixes all the vulnerabilities described in all the advisories identified ("Combined First Fixed"). Customers can use the Cisco Software Checker to search advisories in the following ways: Choose the software and one or more releases Upload a .txt file that includes a list of specific releases Enter the output of the show version command After initiating a search, customers can customize the search to include all Cisco Security Advisories, a specific advisory, or all advisories in the most recent bundled publication. Customers can use the following form to determine whether a release is affected by any Cisco Security Advisory by entering a Cisco IOS Software release-for example, 15.1(4)M2 : [ ] [Check] By default, the Cisco Software Checker includes results only for vulnerabilities that have a Critical or High Security Impact Rating (SIR). To include results for Medium SIR vulnerabilities, customers can use the Cisco Software Checker on Cisco.com and check the Medium check box in the drop-down list under Impact Rating when customizing a search. Fixed Releases for All VDS-Related Vulnerabilities in This Bundle of Advisories This release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication contains multiple advisories for vulnerabilities that affect VDS. To help ensure a complete upgrade solution for these vulnerabilities, administrators are advised to upgrade affected devices to a fixed software release that addresses all VDS-related advisories in this bundled publication: cisco-sa-ios-iot-udp-vds-inj-f2D5Jzrt cisco-sa-ios-iot-vds-cmd-inj-VfJtqGhE cisco-sa-ios-iot-vds-cred-uPMp9zbY cisco-sa-ios-ir800-img-verif-wHhLYHjK Exploitation and Public Announcements o The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory. Source o This vulnerability was found during internal security testing by X.B. of the Cisco Advanced Security Initiatives Group (ASIG) and E.I. of Cisco PSIRT. Cisco Security Vulnerability Policy o To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy . This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco. Related to This Advisory o Cisco Event Response: June 2020 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication URL o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/ cisco-sa-ios-iot-vds-cmd-inj-VfJtqGhE Revision History o +----------+---------------------------+----------+--------+--------------+ | Version | Description | Section | Status | Date | +----------+---------------------------+----------+--------+--------------+ | 1.0 | Initial public release. | - | Final | 2020-JUN-03 | +----------+---------------------------+----------+--------+--------------+ - -------------------------------------------------------------------------------- Cisco IOS Software for Cisco Industrial Routers Virtual Device Server Inter-VM Channel Command Injection Vulnerability Priority: Critical Advisory ID: cisco-sa-ios-iot-udp-vds-inj-f2D5Jzrt First Published: 2020 June 3 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvq66443 CVE-2020-3205 CWE-20 CVSS Score: 8.8 AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X Summary o A vulnerability in the implementation of the inter-VM channel of Cisco IOS Software for Cisco 809 and 829 Industrial Integrated Services Routers (Industrial ISRs) and Cisco 1000 Series Connected Grid Routers (CGR1000) could allow an unauthenticated, adjacent attacker to execute arbitrary shell commands on the Virtual Device Server (VDS) of an affected device. The vulnerability is due to insufficient validation of signaling packets that are destined to VDS. An attacker could exploit this vulnerability by sending malicious packets to an affected device. A successful exploit could allow the attacker to execute arbitrary commands in the context of the Linux shell of VDS with the privileges of the root user. Because the device is designed on a hypervisor architecture, exploitation of a vulnerability that affects the inter-VM channel may lead to a complete system compromise. For more information about this vulnerability, see the Details section of this advisory. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/ cisco-sa-ios-iot-udp-vds-inj-f2D5Jzrt This advisory is part of the June 3, 2020, release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication, which includes 23 Cisco Security Advisories that describe 25 vulnerabilities. For a complete list of the advisories and links to them, see Cisco Event Response: June 2020 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication . Affected Products o Vulnerable Products This vulnerability affects the following Cisco products if they are running a vulnerable release of Cisco IOS Software: Cisco 809 and 829 Industrial ISRs CGR1000 For information about which Cisco software releases are vulnerable, see the Fixed Software section of this advisory. Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability. Cisco has confirmed that this vulnerability does not affect the following Cisco products: 800 Series ISRs 807 Industrial ISRs IOS XE Software IOS XR Software NX-OS Software Details o Cisco 800 Series Industrial ISRs and Cisco CGR1000 devices are designed on a hypervisor architecture, where Cisco IOS Software, a Guest Operating System (Guest OS), and VDS run as separate virtual machines (VMs). Cisco IOS Software and Guest OS need to access some shared devices. Examples are embedded multimedia card (eMMC) flash memory, USB ports, and the console. VDS coordinates access to the shared devices and provides communication channels between VMs over emulated Ethernet interfaces. Cisco IOS Software and VDS perform inter-VM signaling and control operations over a UDP channel on UDP port 9700. The attacker could gain full control of the VDS and compromise the system completely because signaling packets are not restricted-they are not processed only when they are sent to internal, local communications between VMs. Instead, an affected system will accept and process signaling packets from any interface of an affected device. Successful exploitation could allow the attacker to gain full control of VDS, which could lead to a complete system compromise, including compromise of the Cisco IOS Software VM and the Guest OS VM. Workarounds o There are no workarounds that address this vulnerability. Customers can reduce the attack surface by restricting inbound traffic destined for UDP port 9700 of an affected device by implementing an access control list (ACL) or infrastructure access control list (iACL). This may be a suitable mitigation until affected devices can be upgraded. Information about access lists is in Cisco Guide to Harden Cisco IOS Devices. Information about iACLs is in Protecting Your Core: Infrastructure Protection Access Control Lists . Fixed Software o Cisco has released free software updates that address the vulnerability described in this advisory. Customers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license: https://www.cisco.com/c/en/us/products/end-user-license-agreement.html Additionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades. When considering software upgrades , customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts page , to determine exposure and a complete upgrade solution. In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers. Customers Without Service Contracts Customers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco TAC: https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html Customers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade. Cisco IOS Software To help customers determine their exposure to vulnerabilities in Cisco IOS Software, Cisco provides the Cisco Software Checker to identify any Cisco Security Advisories that impact a specific Cisco IOS Software release and the earliest release that fixes the vulnerabilities described in each advisory ("First Fixed"). If applicable, the tool also returns the earliest release that fixes all the vulnerabilities described in all the advisories identified ("Combined First Fixed"). Customers can use the Cisco Software Checker to search advisories in the following ways: Choose the software and one or more releases Upload a .txt file that includes a list of specific releases Enter the output of the show version command After initiating a search, customers can customize the search to include all Cisco Security Advisories, a specific advisory, or all advisories in the most recent bundled publication. Customers can use the following form to determine whether a release is affected by any Cisco Security Advisory by entering a Cisco IOS Software release-for example, 15.1(4)M2 : [ ] [Check] By default, the Cisco Software Checker includes results only for vulnerabilities that have a Critical or High Security Impact Rating (SIR). To include results for Medium SIR vulnerabilities, customers can use the Cisco Software Checker on Cisco.com and check the Medium check box in the drop-down list under Impact Rating when customizing a search. Fixed Releases for All VDS-Related Vulnerabilities in This Bundle of Advisories This release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication contains multiple advisories for vulnerabilities that affect VDS. To help ensure a complete upgrade solution for these vulnerabilities, administrators are advised to upgrade affected devices to a fixed software release that addresses all VDS-related advisories in this bundled publication: cisco-sa-ios-iot-udp-vds-inj-f2D5Jzrt cisco-sa-ios-iot-vds-cmd-inj-VfJtqGhE cisco-sa-ios-iot-vds-cred-uPMp9zbY cisco-sa-ios-ir800-img-verif-wHhLYHjK Exploitation and Public Announcements o The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory. Source o This vulnerability was found during internal security testing by X.B. of the Cisco Advanced Security Initiatives Group (ASIG) and E.I. of Cisco PSIRT. Cisco Security Vulnerability Policy o To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy . This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco. Related to This Advisory o Cisco Event Response: June 2020 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication URL o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/ cisco-sa-ios-iot-udp-vds-inj-f2D5Jzrt Revision History o +----------+---------------------------+----------+--------+--------------+ | Version | Description | Section | Status | Date | +----------+---------------------------+----------+--------+--------------+ | 1.0 | Initial public release. | - | Final | 2020-JUN-03 | +----------+---------------------------+----------+--------+--------------+ - -------------------------------------------------------------------------------- Cisco IOS Software for Cisco Industrial Routers Virtual Device Server Static Credentials Vulnerability Priority: High Advisory ID: cisco-sa-ios-iot-vds-cred-uPMp9zbY First Published: 2020 June 3 16:00 GMT Version 1.0: Final Workarounds: Yes Cisco Bug IDs: CSCvo56332 CVE-2020-3234 CWE-798 CVSS Score: 8.8 AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:X/RL:X/RC:X Summary o A vulnerability in the virtual console authentication of Cisco IOS Software for Cisco 809 and 829 Industrial Integrated Services Routers (Industrial ISRs) and Cisco 1000 Series Connected Grid Routers (CGR1000) could allow an authenticated but low-privileged, local attacker to log in to the Virtual Device Server (VDS) of an affected device by using a set of default credentials. The vulnerability is due to the presence of weak, hard-coded credentials. An attacker could exploit this vulnerability by authenticating to the targeted device and then connecting to VDS through the device's virtual console by using the static credentials. A successful exploit could allow the attacker to access the Linux shell of VDS as the root user. Cisco has released software updates that address this vulnerability. There is a workaround that addresses this vulnerability in Cisco IOS Software releases 15.6(3)M and later. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/ cisco-sa-ios-iot-vds-cred-uPMp9zbY This advisory is part of the June 3, 2020, release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication, which includes 23 Cisco Security Advisories that describe 25 vulnerabilities. For a complete list of the advisories and links to them, see Cisco Event Response: June 2020 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication . Affected Products o Vulnerable Products This vulnerability affects the following Cisco products if they are running a vulnerable release of Cisco IOS Software: Cisco 809 and 829 Industrial ISRs CGR1000 For information about which Cisco software releases are vulnerable, see the Fixed Software section of this advisory. Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability. Cisco has confirmed that this vulnerability does not affect the following Cisco products: 800 Series ISRs 807 Industrial ISRs IOS XE Software IOS XR Software NX-OS Software Details o Cisco 800 Series Industrial ISRs and Cisco CGR1000 devices are designed on a hypervisor architecture, where Cisco IOS Software, a Guest Operating System (Guest OS), and VDS run as separate virtual machines (VMs). Cisco IOS Software and Guest OS need to access some shared devices. Examples are embedded multimedia card eMMC flash memory, USB ports, and the console. VDS coordinates access to the shared devices and provides communication channels between VMs over emulated Ethernet interfaces. The vulnerability described in this advisory is localized in the context of VDS; under no circumstances could an attacker use the static credentials to log in to the Cisco IOS Software VM. Workarounds o There is a workaround that addresses this vulnerability in Cisco IOS Software releases 15.6(3)M and later. These releases introduced the global configuration command iox hypervisor password < strong_password > to allow administrators to replace the default password that is used to log in to VDS. An administrator can use this command to define a strong password to replace the default password that provides VDS access on an affected device, as shown in the following example: Router#configure terminal router(config)#iox hypervisor password <strong_password> Router(config)#end Router# This action may be a suitable workaround until switches that are affected by this vulnerability can be upgraded. Fixed Software o Cisco has released free software updates that address the vulnerability described in this advisory. Customers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license: https://www.cisco.com/c/en/us/products/end-user-license-agreement.html Additionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades. When considering software upgrades , customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts page , to determine exposure and a complete upgrade solution. In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers. Customers Without Service Contracts Customers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco TAC: https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html Customers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade. Cisco IOS Software To help customers determine their exposure to vulnerabilities in Cisco IOS Software, Cisco provides the Cisco Software Checker to identify any Cisco Security Advisories that impact a specific Cisco IOS Software release and the earliest release that fixes the vulnerabilities described in each advisory ("First Fixed"). If applicable, the tool also returns the earliest release that fixes all the vulnerabilities described in all the advisories identified ("Combined First Fixed"). Customers can use the Cisco Software Checker to search advisories in the following ways: Choose the software and one or more releases Upload a .txt file that includes a list of specific releases Enter the output of the show version command After initiating a search, customers can customize the search to include all Cisco Security Advisories, a specific advisory, or all advisories in the most recent bundled publication. Customers can use the following form to determine whether a release is affected by any Cisco Security Advisory by entering a Cisco IOS Software release-for example, 15.1(4)M2 : [ ] [Check] By default, the Cisco Software Checker includes results only for vulnerabilities that have a Critical or High Security Impact Rating (SIR). To include results for Medium SIR vulnerabilities, customers can use the Cisco Software Checker on Cisco.com and check the Medium check box in the drop-down list under Impact Rating when customizing a search. Fixed Releases for All VDS-Related Vulnerabilities in This Bundle of Advisories This release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication contains multiple advisories for vulnerabilities that affect VDS. To help ensure a complete upgrade solution for these vulnerabilities, administrators are advised to upgrade affected devices to a fixed software release that addresses all VDS-related advisories in this bundled publication: cisco-sa-ios-iot-udp-vds-inj-f2D5Jzrt cisco-sa-ios-iot-vds-cmd-inj-VfJtqGhE cisco-sa-ios-iot-vds-cred-uPMp9zbY cisco-sa-ios-ir800-img-verif-wHhLYHjK Exploitation and Public Announcements o The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory. Source o This vulnerability was found during internal security testing by X.B. of the Cisco Advanced Security Initiatives Group (ASIG) and E.I. of Cisco PSIRT. Cisco Security Vulnerability Policy o To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy . This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco. Related to This Advisory o Cisco Event Response: June 2020 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication URL o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/ cisco-sa-ios-iot-vds-cred-uPMp9zbY Revision History o +----------+---------------------------+----------+--------+--------------+ | Version | Description | Section | Status | Date | +----------+---------------------------+----------+--------+--------------+ | 1.0 | Initial public release. | - | Final | 2020-JUN-03 | +----------+---------------------------+----------+--------+--------------+ - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. 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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