Description
A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions), SIMATIC S7-400 CPU family (incl. SIPLUS variants) (All versions), SIMATIC WinAC RTX (F) 2010 (All versions), SINUMERIK 840D sl (All versions). The authentication protocol between a client and a PLC via port 102/tcp (ISO-TSAP) insufficiently protects the transmitted password. This could allow an attacker that is able to intercept the network traffic to obtain valid PLC credentials.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Siemens | SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) | All versions | — |
| Siemens | SIMATIC S7-400 CPU family (incl. SIPLUS variants) | All versions | — |
| Siemens | SIMATIC WinAC RTX (F) 2010 | All versions | — |
| Siemens | SINUMERIK 840D sl | All versions | — |
Advisories 1
- ICSA-20-252-02 Siemens SIMATIC S7-300 and S7-400 CPUs (Update C) CISA ICS & IT advisories · Dec 8, 2020