CVE-2014-2251
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.74%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 2.0
- 8.3 HIGHAV:N/AC:M/Au:N/C:P/I:P/A:C
- EPSS
- 2.74% probability · 85th percentile
- CISA KEV
- Not listed
- Affected
- siemens/simatic s7-1500 cpu firmware
- Source
- cve@mitre.org
References
- http://ics-cert.us-cert.gov/advisories/ICSA-14-073-01US Government Resource
- http://www.siemens.com/innovation/pool/de/forschungsfelder/siemens_security_advisory_ssa-456423.pdfPatch, Vendor Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-456423.pdf
- http://ics-cert.us-cert.gov/advisories/ICSA-14-073-01US Government Resource
- http://www.siemens.com/innovation/pool/de/forschungsfelder/siemens_security_advisory_ssa-456423.pdfPatch, Vendor Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-456423.pdf
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.