Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Siemens | Simatic Pcs 7 Firmware | <= 8.2 |
| Siemens | Simatic Pcs 7 | - |
| Siemens | Simatic Pdm Firmware | - |
| Siemens | Simatic Pdm | - |
| Siemens | Simatic Step 7 Firmware | >= 5.0, < 5.7 |
| Siemens | Simatic Step 7 | - |
| Siemens | Sinamics Starter Firmware | < 5.4 |
| Siemens | Sinamics Starter | - |
Related Weaknesses (CWE)
References
- https://cert-portal.siemens.com/productcert/pdf/ssa-661034.pdfPatchVendor Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-661034.pdfPatchVendor Advisory
FAQ
What is CVE-2021-31894?
CVE-2021-31894 is a vulnerability with a CVSS score of 8.8 (HIGH). 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 vers...
How severe is CVE-2021-31894?
CVE-2021-31894 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-31894?
Check the references section above for vendor advisories and patch information. Affected products include: Siemens Simatic Pcs 7 Firmware, Siemens Simatic Pcs 7, Siemens Simatic Pdm Firmware, Siemens Simatic Pdm, Siemens Simatic Step 7 Firmware.