CVE-2021-31894

Description

A vulnerability has been identified in SIMATIC PCS 7 V8.2 and earlier (All versions), SIMATIC PCS 7 V9.X (All versions < V9.1 SP2), SIMATIC PDM (All versions < V9.2 SP2), SIMATIC STEP 7 V5.X (All versions < V5.7), SINAMICS STARTER (containing STEP 7 OEM version) (All versions < V5.4 SP2 HF1). A directory containing metafiles relevant to devices' configurations has write permissions. An attacker could leverage this vulnerability by changing the content of certain metafiles and subsequently manipulate parameters or behavior of devices that would be later configured by the affected software.

Category

8.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.08%
Vendor Advisory siemens.com
Affected: Siemens SIMATIC PCS 7 V8.2 and earlier
Affected: Siemens SIMATIC PCS 7 V9.X
Affected: Siemens SIMATIC PDM
Affected: Siemens SIMATIC STEP 7 V5.X
Affected: Siemens SINAMICS STARTER (containing STEP 7 OEM version)
Published at:
Updated at:

References

Link Tags
https://cert-portal.siemens.com/productcert/pdf/ssa-661034.pdf patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-31894?
CVE-2021-31894 has been scored as a high severity vulnerability.
How to fix CVE-2021-31894?
To fix CVE-2021-31894, 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-2021-31894 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-31894 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-31894?
CVE-2021-31894 affects Siemens SIMATIC PCS 7 V8.2 and earlier, Siemens SIMATIC PCS 7 V9.X, Siemens SIMATIC PDM, Siemens SIMATIC STEP 7 V5.X, Siemens SINAMICS STARTER (containing STEP 7 OEM version).
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