The random-number generator on Siemens SIMATIC S7-1500 CPU PLC devices with firmware before 1.5.0 does not have sufficient entropy, which makes it easier for remote attackers to defeat cryptographic protection mechanisms and hijack sessions via unspecified vectors.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Simatic_s7-1500_cpu_firmware | Siemens | * | 1.1.2 (including) |
| Simatic_s7-1500_cpu_firmware | Siemens | 1.0.1 (including) | 1.0.1 (including) |
| Simatic_s7-1500_cpu_firmware | Siemens | 1.1.0 (including) | 1.1.0 (including) |
| Simatic_s7-1500_cpu_firmware | Siemens | 1.1.1 (including) | 1.1.1 (including) |
References
- http://ics-cert.us-cert.gov/advisories/ICSA-14-073-01
- http://www.siemens.com/innovation/pool/de/forschungsfelder/siemens_security_advisory_ssa-456423.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-456423.pdf
- http://ics-cert.us-cert.gov/advisories/ICSA-14-073-01
- http://www.siemens.com/innovation/pool/de/forschungsfelder/siemens_security_advisory_ssa-456423.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-456423.pdf