Path traversal in SIMATIC PCS 7 and Siemens SIMATIC WinCC - CVE-2021-40358
Published: November 18, 2021
Vulnerability identifier: #VU58235
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-40358
CWE-ID: CWE-22
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform directory traversal attacks.
The vulnerability exists due to input validation error when processing directory traversal sequences. A remote authenticated attacker can send a specially crafted HTTP request and read, write or delete critical files.
Affected software
SIMATIC PCS 7
Siemens SIMATIC WinCC
Siemens SIMATIC WinCC
How to mitigate CVE-2021-40358
Install update from vendor's website.
SIMATIC PCS 7 - update to 7.5 SP2 Update 5