CVE-2016-8562
Published on November 18, 2016
A vulnerability has been identified in SIMATIC CP 1543-1 (All versions < V2.0.28), SIPLUS NET CP 1543-1 (All versions < V2.0.28). Under special conditions it was possible to write SNMP variables on port 161/udp which should be read-only and should only be configured with TIA-Portal. A write to these variables could reduce the availability or cause a denial-of-service.
Known Exploited Vulnerability
This Siemens SIMATIC CP 1543-1 Improper Privilege Management Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. An improper privilege management vulnerability exists within the Siemens SIMATIC Communication Processor (CP) that allows a privileged attacker to remotely cause a denial of service.
The following remediation steps are recommended / required by March 24, 2022: Apply updates per vendor instructions.
Vulnerability Analysis
CVE-2016-8562 is exploitable with network access, and requires small amount of user privileges. This vulnerability is consided to have a high level of attack complexity. This vulnerability is known to be actively exploited by threat actors. The potential impact of an exploit of this vulnerability is considered to be very high.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.