SSA-617264 (Last Update: 2020-04-13): Multiple Security Vulnerabilities in SIMATIC S7-400 V5 PN CPUs

Published

2020-04-13 00:00:00 UTC

Summary

When receiving malformed network data, SIMATIC S7-400 V5 PN CPUs may go into defect mode. This would allow attackers to perform a Denial-of-Service attack on the CPUs.

Siemens will not publish a fix for this vulnerability as this product version is discontinued since October 2011 [1]. Version V6 is not affected by these specific problems. [1] https://support.industry.siemens.com/cs/ww/en/view/50252551