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AUSCERT External Security Bulletin Redistribution
ESB-2024.2263
ICS Advisory | ICSA-24-102-03 Siemens RUGGEDCOM APE1808 before V11.0.1
12 April 2024
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AusCERT Security Bulletin Summary
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Product: Siemens RUGGEDCOM APE1808
Publisher: ICS-CERT
Operating System: Network Appliance
Resolution: Patch/Upgrade
CVE Names: CVE-2023-38046 CVE-2023-0008 CVE-2023-6790
CVE-2023-6791 CVE-2022-0028 CVE-2023-0005
Original Bulletin:
https://www.cisa.gov/news-events/ics-advisories/icsa-24-102-03
Comment: CVSS (Max): 8.6 CVE-2022-0028 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H)
CVSS Source: ICS-CERT
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
The following are listed in the CISA Known Exploited Vulnerabilities (KEV) Catalog:
CISA KEV CVE(s): CVE-2022-0028
CISA KEV URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
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ICS Advisory (ICSA-24-102-03)
Siemens RUGGEDCOM APE1808 before V11.0.1
Release Date
April 11, 2024
As of January 10, 2023, CISA will no longer be updating ICS security advisories
for Siemens product vulnerabilities beyond the initial advisory. For the most
up-to-date information on vulnerabilities in this advisory, please see Siemens'
ProductCERT Security Advisories (CERT Services | Services | Siemens Global).
1. EXECUTIVE SUMMARY
o CVSS v4 6.1
o ATTENTION : Exploitable remotely/low attack complexity
o Vendor : Siemens
o Equipment : RUGGEDCOM APE1808
o Vulnerabilities : Network Amplification, Exposure of Sensitive System
Information to an Unauthorized Control Sphere, External Control of File
Name or Path, Cross-site Scripting, Insufficiently Protected Credentials,
Externally Controlled Reference to a Resource in Another Sphere
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow a network-based
attacker to conduct reflected and amplified TCP denial-of-service (RDoS)
attacks.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of Siemens RUGGEDCOM APE1808, an application hosting
platform, are affected:
o Siemens RUGGEDCOM APE1808: All versions with Palo Alto Networks Virtual
NGFW before V11.0.1
3.2 Vulnerability Overview
3.2.1 INSUFFICIENT CONTROL OF NETWORK MESSAGE VOLUME (NETWORK AMPLIFICATION)
CWE-406
A PAN-OS URL filtering policy misconfiguration could allow a network-based
attacker to conduct reflected and amplified TCP denial-of-service (DoS)
attacks. The DoS attack would appear to originate from a Palo Alto Networks
PA-Series (hardware), VM-Series (virtual) and CN-Series (container) firewall
against an attacker-specified target. To be misused by an external attacker,
the firewall configuration must have a URL filtering profile with one or more
blocked categories assigned to a source zone that has an external facing
interface. This configuration is not typical for URL filtering and, if set, is
likely unintended by the administrator. If exploited, this issue would not
impact the confidentiality, integrity, or availability of our products.
However, the resulting denial-of-service (DoS) attack may help obfuscate the
identity of the attacker and implicate the firewall as the source of the
attack. We have taken prompt action to address this issue in our PAN-OS
software. All software updates for this issue are expected to be released no
later than the week of August 15, 2022. This issue does not impact Panorama
M-Series or Panorama virtual appliances. This issue has been resolved for all
Cloud NGFW and Prisma Access customers and no additional action is required
from them.
CVE-2022-0028 has been assigned to this vulnerability. A CVSS v3.1 base score
of 8.6 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:C
/C:N/I:N/A:H ).
3.2.2 EXPOSURE OF SENSITIVE SYSTEM INFORMATION TO AN UNAUTHORIZED CONTROL
SPHERE CWE-497
A vulnerability in Palo Alto Networks PAN-OS software enables an authenticated
administrator to expose the plaintext values of secrets stored in the device
configuration and encrypted API keys.
CVE-2023-0005 has been assigned to this vulnerability. A CVSS v3.1 base score
of 4.1 has been calculated; the CVSS vector string is ( AV:L/AC:H/PR:H/UI:N/S:U
/C:H/I:N/A:N ).
3.2.3 EXTERNAL CONTROL OF FILE NAME OR PATH CWE-73
A file disclosure vulnerability in Palo Alto Networks PAN-OS software enables
an authenticated read-write administrator with access to the web interface to
export local files from the firewall through a race condition.
CVE-2023-0008 has been assigned to this vulnerability. A CVSS v3.1 base score
of 4.4 has been calculated; the CVSS vector string is ( AV:N/AC:H/PR:H/UI:N/S:U
/C:H/I:N/A:N ).
3.2.4 IMPROPER NEUTRALIZATION OF INPUT DURING WEB PAGE GENERATION ('CROSS-SITE
SCRIPTING') CWE-79
A DOM-Based cross-site scripting (XSS) vulnerability in Palo Alto Networks
PAN-OS software enables a remote attacker to execute a JavaScript payload in
the context of an administrator's browser when they view a specifically crafted
link to the PAN-OS web interface.
CVE-2023-6790 has been assigned to this vulnerability. A CVSS v3.1 base score
of 4.9 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:H/UI:N/S:U
/C:H/I:N/A:N ).
A CVSS v4 score has also been calculated for CVE-2023-6790 . A base score of
6.1 has been calculated; the CVSS vector string is ( CVSS4.0/AV:N/AC:L/AT:N/
PR:H/UI:N/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N ).
3.2.5 INSUFFICIENTLY PROTECTED CREDENTIALS CWE-522
A credential disclosure vulnerability in Palo Alto Networks PAN-OS software
enables an authenticated read-only administrator to obtain the plaintext
credentials of stored external system integrations such as LDAP, SCP, RADIUS,
TACACS+, and SNMP from the web interface.
CVE-2023-6791 has been assigned to this vulnerability. A CVSS v3.1 base score
of 4.9 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:H/UI:N/S:U
/C:H/I:N/A:N ).
A CVSS v4 score has also been calculated for CVE-2023-6791 . A base score of
6.1 has been calculated; the CVSS vector string is ( CVSS4.0/AV:N/AC:L/AT:N/
PR:H/UI:N/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N ).
3.2.6 EXTERNALLY CONTROLLED REFERENCE TO A RESOURCE IN ANOTHER SPHERE CWE-610
A vulnerability exists in Palo Alto Networks PAN-OS software that enables an
authenticated administrator with the privilege to commit a specifically created
configuration to read local files and resources from the system.
CVE-2023-38046 has been assigned to this vulnerability. A CVSS v3.1 base score
of 5.5 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:H/UI:N/S:U
/C:H/I:L/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
Siemens has identified the following specific workarounds and mitigations users
can apply to reduce risk:
o RUGGEDCOM APE1808: Upgrade Palo Alto Networks Virtual NGFW V11.0.1. Contact
Siemens customer support to receive patch and update information.
As a general security measure, Siemens recommends protecting network access to
devices with appropriate mechanisms. To operate the devices in a protected IT
environment, Siemens recommends configuring the environment according to
Siemens' operational guidelines for industrial security and following
recommendations in the product manuals.
Additional information on industrial security by Siemens can be found on the
Siemens industrial security webpage .
For more information see the associated Siemens security advisory SSA-822518 in
HTML and CSAF .
CISA recommends users take defensive measures to minimize the risk of
exploitation of this (these) vulnerability(ies), such as:
o Minimize network exposure for all control system devices and/or systems,
ensuring they are not accessible from the internet .
o Locate control system networks and remote devices behind firewalls and
isolating them from business networks.
o When remote access is required, use more 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 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 cisa.gov/ics . Several CISA products detailing cyber
defense best practices are available for reading and download, including
Improving Industrial Control Systems Cybersecurity with Defense-in-Depth
Strategies .
CISA encourages organizations to implement recommended cybersecurity strategies
for proactive defense of ICS assets .
Additional mitigation guidance and recommended practices are publicly available
on the ICS webpage at cisa.gov/ics in the technical information paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Strategies .
Organizations observing suspected malicious activity should follow established
internal procedures and report findings to CISA for tracking and correlation
against other incidents.
CISA also recommends users take the following measures to protect themselves
from social engineering attacks:
o Do not click web links or open attachments in unsolicited 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.
No known public exploitation specifically targeting these vulnerabilities has
been reported to CISA at this time.
5. UPDATE HISTORY
o April 11, 2024: Initial Publication
This product is provided subject to this Notification and this Privacy & Use
policy.
Vendor
Siemens
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