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. It has an exploitability score of 1.6 out of four. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
Products Associated with CVE-2016-8562
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What versions are vulnerable to CVE-2016-8562?
Each of the following must match for the vulnerability to exist.