CVE-2023-42796: siemens cp-8031_firmware Path Traversal

Vulnerability summary

CVE-2023-42796 is a high (CVSS 8.8) Path Traversal vulnerability in siemens cp-8031_firmware. EPSS estimates a 0.97% chance of exploitation in the next 30 days, higher than 61.6% of scored vulnerabilities.

Timeline

1. 10-10-2023
   PublishedVulnerability first disclosed.
2. 27-02-2025
   Last modifiedVulnerability information updated.

Description

A vulnerability has been identified in CP-8031 MASTER MODULE (All versions < CPCI85 V05.11), CP-8050 MASTER MODULE (All versions < CPCI85 V05.11). The web server of affected devices fails to properly sanitize user input for the /sicweb-ajax/tmproot/ endpoint. This could allow an authenticated remote attacker to traverse directories on the system and download arbitrary files. By exploring active session IDs, the vulnerability could potentially be leveraged to escalate privileges to the administrator role.

• CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.