Vulnerability CVE-2014-2251
Published: 2014-03-16   Modified: 2014-03-18

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.

Type:

CWE-Other

CVSS2 => (AV:N/AC:M/Au:N/C:P/I:P/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
8.3/10
8.5/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Complete
Affected software
Siemens -> Simatic s7-1500 cpu firmware 

 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
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