CVE-2024-42344 Siemens CVE debrief

Who should care

Organizations operating Siemens SINEMA Remote Connect Client in industrial environments, particularly those with multi-user systems or shared infrastructure where operators, engineers, or maintenance personnel have interactive logon access to the underlying host operating system. Security teams responsible for OT/ICS asset management and privilege separation should prioritize this fix.

Technical summary

The vulnerability exists in the logging mechanism of SINEMA Remote Connect Client, where sensitive configuration data is written to log files without adequate access controls. The log files are readable by all legitimate users of the underlying operating system, not just the application service account or administrators. This allows any authenticated user with local system access to read the logs and extract other users' configuration data. The attack requires local access (AV:L) and low privileges (PR:L), with no user interaction needed (UI:N). The confidentiality impact is rated low (C:L) as the exposure is limited to configuration data rather than full system compromise.

Defensive priority

medium

Recommended defensive actions

• Apply the vendor fix by updating SINEMA Remote Connect Client to version 3.2 SP2 or later
• Review and restrict file system permissions on log directories to enforce least privilege
• Audit existing log files for exposure of sensitive configuration data and rotate or purge as appropriate
• Monitor for unauthorized access attempts to application log files
• Implement defense-in-depth controls per CISA ICS recommended practices for industrial control systems

Evidence notes

CISA ICS advisory ICSA-24-256-10 and Siemens security advisory SSA-417159 document that the affected application inserts sensitive information into a log file with overly permissive read access. The CVSS vector indicates local attack vector, low attack complexity, low privileges required, and low confidentiality impact.

Official resources