CVE-2021-40358

Description

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.

Category

9.9
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.58%
Vendor Advisory siemens.com
Affected: Siemens SIMATIC PCS 7 V8.2
Affected: Siemens SIMATIC PCS 7 V9.0
Affected: Siemens SIMATIC PCS 7 V9.1
Affected: Siemens SIMATIC WinCC V15 and earlier
Affected: Siemens SIMATIC WinCC V16
Affected: Siemens SIMATIC WinCC V17
Affected: Siemens SIMATIC WinCC V7.4
Affected: Siemens SIMATIC WinCC V7.5
Published at:
Updated at:

References

Link Tags
https://cert-portal.siemens.com/productcert/pdf/ssa-840188.pdf vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-40358?
CVE-2021-40358 has been scored as a critical severity vulnerability.
How to fix CVE-2021-40358?
To fix CVE-2021-40358, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-40358 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-40358 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-40358?
CVE-2021-40358 affects Siemens SIMATIC PCS 7 V8.2, Siemens SIMATIC PCS 7 V9.0, Siemens SIMATIC PCS 7 V9.1, Siemens SIMATIC WinCC V15 and earlier, Siemens SIMATIC WinCC V16, Siemens SIMATIC WinCC V17, Siemens SIMATIC WinCC V7.4, Siemens SIMATIC WinCC V7.5.
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