CVE-2021-40358 vulnerability in Siemens Products
Published on November 9, 2021
A vulnerability has been identified in SIMATIC PCS 7 V8.2 (All versions), SIMATIC PCS 7 V9.0 (All versions < V9.0 SP3 UC04), SIMATIC PCS 7 V9.1 (All versions < V9.1 SP1), SIMATIC WinCC V15 and earlier (All versions < V15 SP1 Update 7), SIMATIC WinCC V16 (All versions < V16 Update 5), SIMATIC WinCC V17 (All versions < V17 Update 2), SIMATIC WinCC V7.4 (All versions < V7.4 SP1 Update 19), SIMATIC WinCC V7.5 (All versions < V7.5 SP2 Update 5). Legitimate file operations on the web server of the affected systems do not properly neutralize special elements within the pathname. An attacker could then cause the pathname to resolve to a location outside of the restricted directory on the server and read, write or delete unexpected critical files.
Weakness Type
What is a Directory traversal Vulnerability?
The software 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 software 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.
CVE-2021-40358 has been classified to as a Directory traversal vulnerability or weakness.
Products Associated with CVE-2021-40358
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Affected Versions
Siemens SIMATIC PCS 7 V8.2:- Version All versions is affected.
- Version All versions < V9.0 SP3 UC04 is affected.
- Version All versions < V9.1 SP1 is affected.
- Version All versions < V15 SP1 Update 7 is affected.
- Version All versions < V16 Update 5 is affected.
- Version All versions < V17 Update 2 is affected.
- Version All versions < V7.4 SP1 Update 19 is affected.
- Version All versions < V7.5 SP2 Update 5 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.