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PatchSiren cyber security CVE debrief

CVE-2022-40225 Siemens CVE debrief

A floating point exception vulnerability in Siemens TIM 1531 IRC industrial communication modules can be triggered by casting an internal value under specific conditions, resulting in denial of service. The flaw was disclosed in CISA advisory ICSA-24-165-06 on June 11, 2024, with a CVSS 3.1 score of 6.5 (Medium severity). Affected products include SIPLUS TIM 1531 IRC (6AG1543-1MX00-7XE0) and TIM 1531 IRC (6GK7543-1MX00-0XE0). Siemens has released firmware version V2.4.8 to address this issue. The vulnerability requires network access and low privileges to exploit, with no confidentiality or integrity impact but high availability impact.

Vendor
Siemens
Product
SIPLUS TIM 1531 IRC (6AG1543-1MX00-7XE0)
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2024-06-11
Original CVE updated
2024-07-09
Advisory published
2024-06-11
Advisory updated
2024-07-09

Who should care

Organizations operating Siemens TIM 1531 IRC or SIPLUS TIM 1531 IRC modules in industrial environments, particularly those with remote access enabled or network-exposed OT infrastructure.

Technical summary

The vulnerability exists in the firmware of Siemens TIM 1531 IRC industrial communication modules. An improper casting operation on internal values can trigger a floating point exception, causing the device to crash and resulting in denial of service. The attack vector is network-based with low attack complexity, requiring low privileges but no user interaction. The vulnerability does not impact confidentiality or integrity but has high availability impact.

Defensive priority

medium

Recommended defensive actions

  • Apply Siemens firmware update V2.4.8 or later to affected TIM 1531 IRC devices
  • Review network segmentation for industrial control systems per CISA ICS recommended practices
  • Monitor for anomalous network traffic targeting TIM 1531 IRC modules
  • Validate that remote access to affected devices follows least-privilege principles

Evidence notes

CISA CSAF advisory ICSA-24-165-06 published 2024-06-11; Siemens SSA-337522; CVSS 3.1 vector AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Sources and references

Verified primary and authoritative sources

  • CVE-2022-40225 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2022-40225

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

  • CVE-2022-40225 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2022-40225

    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.