Vulnerability CVE-2021-40358


Published: 2021-11-09

Description:
A vulnerability has been identified in SIMATIC PCS 7 V8.2 and earlier (All versions), SIMATIC PCS 7 V9.0 (All versions), SIMATIC PCS 7 V9.1 (All versions), SIMATIC WinCC V15 and earlier (All versions), SIMATIC WinCC V16 (All versions), SIMATIC WinCC V17 (All versions), SIMATIC WinCC V7.4 and earlier (All versions), SIMATIC WinCC V7.5 (All versions < V7.5 SP2 Update 5). Legitimate file operations 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.

Type:

CWE-22

(Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'))

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.5/10
6.4/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Siemens -> Simatic pcs 7 
Siemens -> Simatic wincc 

 References:
https://cert-portal.siemens.com/productcert/pdf/ssa-840188.pdf

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