CVE-2021-31883: siemens capital embedded ar classic 431-422

Vulnerability summary

CVE-2021-31883 is a high (CVSS 7.5) vulnerability in siemens capital embedded ar classic 431-422. EPSS estimates a 1.53% chance of exploitation in the next 30 days, higher than 74.2% of scored vulnerabilities.

Timeline

1. 09-11-2021
   PublishedVulnerability first disclosed.
2. 11-03-2025
   Last modifiedVulnerability information updated.

Description

A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions < V2303). When processing a DHCP ACK message, the DHCP client application does not validate the length of the Vendor option(s), leading to Denial-of-Service conditions. (FSMD-2021-0013)

• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferThe product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.