PatchSiren cyber security CVE debrief

CVE-2024-33653 Siemens CVE debrief

CVE-2024-33653 is a high-severity vulnerability in Siemens Simcenter Femap, published on 2024-07-09. The vulnerability stems from an out-of-bounds read past the end of an allocated structure when parsing specially crafted BMP files, which could allow an attacker to execute arbitrary code in the context of the current process. The CVSS v3.1 score of 7.8 reflects high impacts to confidentiality, integrity, and availability, with a local attack vector requiring user interaction. Siemens has released a vendor fix in version V2406 or later. CISA and Siemens both recommend avoiding untrusted BMP files as an interim mitigation. No known exploitation in ransomware campaigns has been reported, and this vulnerability is not listed in CISA's Known Exploited Vulnerabilities catalog.

Vendor: Siemens
Product: Simcenter Femap
CVSS: HIGH 7.8
CISA KEV: Not listed in stored evidence
Original CVE published: 2024-07-09
Original CVE updated: 2024-07-09
Advisory published: 2024-07-09
Advisory updated: 2024-07-09

Who should care

Organizations using Siemens Simcenter Femap for engineering simulation and analysis, particularly in industrial and manufacturing environments. Security teams responsible for CAD/CAE software deployments and asset owners in critical infrastructure sectors relying on Femap for finite element modeling workflows.

Technical summary

The vulnerability exists in the BMP file parsing implementation of Siemens Simcenter Femap. When processing a malformed BMP file, the application reads beyond the bounds of an allocated memory structure. This memory safety defect can be leveraged to achieve arbitrary code execution within the context of the current process. The attack requires local access and user interaction to open a malicious file, but successful exploitation yields high-impact consequences including full compromise of confidentiality, integrity, and availability on the affected system.

Defensive priority

high

Recommended defensive actions

Update Siemens Simcenter Femap to version V2406 or later as provided by the vendor
Avoid opening untrusted BMP files in affected applications until patching is complete
Apply defense-in-depth practices for industrial control systems environments per CISA guidance
Monitor for vendor security advisories from Siemens ProductCERT for additional updates

Evidence notes

Vulnerability description and remediation guidance sourced from CISA CSAF advisory ICSA-24-193-04 and Siemens security advisory SSA-064222. CVSS vector and scoring details confirmed in source metadata. Vendor fix version V2406 explicitly stated in remediations section.

Official resources

2024-07-09