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.
How to fix
- siemens simatic_step_7_firmware5.7 or later
- siemens sinamics_starter_firmware5.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| siemens simatic_pcs_7_firmware | v ≤ 8.2, 9.0 | — |
| siemens simatic_pdm_firmware | No range specified | — |
| siemens simatic_step_7_firmware | 5.0 ≤ v < 5.7 | 5.7 |
| siemens sinamics_starter_firmware | v < 5.4, 5.4 | 5.4 |
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