Detections
Analytics

Siemens SIMATIC S7-1500 PLCs < 1.5 Random Number Generator Insufficient Entropy

high Nessus Network Monitor Plugin ID 720194

Synopsis

Siemens SIMATIC S7-1500 PLCs make it easier for remote attackers to defeat cryptographic protection mechanisms and hijack sessions via unspecified vectors.

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.

Solution

Update the S7 1500 firmware to 1.5 or later.

See Also

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

Plugin Details

Severity: High

ID: 720194

Family: SCADA

Published: 5/8/2019

Updated: 9/30/2019

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 8.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:C

Vulnerability Information

Patch Publication Date: 3/14/2014

Vulnerability Publication Date: 3/14/2014

Reference Information

CVE: CVE-2014-2251