CVE-2021-31893
High
Description
A vulnerability has been identified in SIMATIC PCS 7 V8.2 and earlier (All versions), SIMATIC PCS 7 V9.0 (All versions < V9.0 SP3), SIMATIC PDM (All versions < V9.2), SIMATIC STEP 7 V5.X (All versions < V5.6 SP2 HF3), SINAMICS STARTER (containing STEP 7 OEM version) (All versions < V5.4 HF2). The affected software contains a buffer overflow vulnerability while handling certain files that could allow a local attacker to trigger a denial-of-service condition or potentially lead to remote code execution.
SeverityHigh
CVSS7.8
Exploit probability—
ProductSiemens Simatic Pcs Firmware
PublishedJul 13, 2021
First seenJul 13, 2021
Weakness typeCWE-120CWE-120
How to fix
Update
- siemens simatic_pdm_firmware9.2 or later
- siemens sinamics_starter_firmware5.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| siemens simatic_pcs_firmware | v ≤ 8.2, 9.0 | — |
| siemens simatic_pdm_firmware | v < 9.2 | 9.2 |
| siemens simatic_step_7_firmware | v ≤ 5.6 | — |
| siemens sinamics_starter_firmware | v < 5.4, 5.4 | 5.4 |
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