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CVE-2023-2124 Siemens CVE debrief

CVE-2023-2124 is an out-of-bounds memory access vulnerability in the Linux kernel's XFS file system, specifically triggered when a user restores an XFS image after a failure with a dirty log journal. The flaw was published on June 11, 2024, and last modified on July 9, 2024. Siemens has identified this vulnerability as affecting its TIM 1531 IRC industrial communication modules, including the SIPLUS TIM 1531 IRC (6AG1543-1MX00-7XE0) and TIM 1531 IRC (6GK7543-1MX00-0XE0) variants. The vulnerability allows a local attacker to crash the system or potentially escalate privileges, with a CVSS 3.1 score of 7.8 (HIGH). The attack vector is local, requiring low attack complexity and low privileges, with no user interaction needed. Siemens has released firmware version V2.4.8 or later to address this vulnerability. Organizations operating affected industrial control systems should prioritize patching, as successful exploitation could lead to complete system compromise in terms of confidentiality, integrity, and availability.

Vendor
Siemens
Product
SIPLUS TIM 1531 IRC (6AG1543-1MX00-7XE0)
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2024-02-13
Original CVE updated
2024-02-13
Advisory published
2024-02-13
Advisory updated
2024-02-13

Who should care

Organizations operating Siemens TIM 1531 IRC industrial communication modules in manufacturing, energy, and critical infrastructure environments. System administrators responsible for industrial control system security, OT security teams, and asset owners with Siemens S7-1500 PLC installations using TIM 1531 IRC for remote communication.

Technical summary

The vulnerability exists in the XFS file system's handling of dirty log journal recovery. When restoring an XFS image after a failure, improper bounds checking leads to out-of-bounds memory access. This is exploitable by a local user with low privileges and can result in denial of service through system crashes or privilege escalation to root. The attack requires local access but no user interaction. Affected Siemens products use embedded Linux systems where this kernel vulnerability may be present in firmware versions prior to V2.4.8.

Defensive priority

high

Recommended defensive actions

  • Update affected Siemens TIM 1531 IRC devices to firmware version V2.4.8 or later as specified in the vendor security advisory
  • Apply defense-in-depth strategies for industrial control systems per CISA recommended practices
  • Restrict local access to affected systems to authorized personnel only
  • Monitor for anomalous system crashes or privilege escalation attempts on affected devices
  • Review and validate backup and recovery procedures for XFS file system operations
  • Consult Siemens support resources for detailed installation guidance

Evidence notes

Vulnerability description and affected products confirmed through CISA CSAF advisory ICSA-24-165-06, which references Siemens security advisory SSA-337522. Vendor fix specified as update to V2.4.8 or later.

Sources and references

Verified primary and authoritative sources

  • CVE-2023-2124 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2023-2124

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2023-2124 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2023-2124

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2024/icsa-24-165-06.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-337522.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-337522.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/pdf/ssa-337522.pdf

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/txt/ssa-337522.txt

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-24-165-06

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/resources-tools/resources/ics-recommended-practices

    Reference

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.