CVE-2021-25664: siemens capital embedded ar classic 431-422 Infinite Loop

Vulnerability summary

CVE-2021-25664 is a high (CVSS 8.7) Infinite Loop vulnerability in siemens capital embedded ar classic 431-422. EPSS estimates a 1.88% chance of exploitation in the next 30 days, higher than 79.1% of scored vulnerabilities.

Timeline

1. 22-04-2021
   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), Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2017.02.4), Nucleus ReadyStart V4 (All versions < V4.1.0), Nucleus Source Code (All versions including affected IPv6 stack). The function that processes the Hop-by-Hop extension header in IPv6 packets and its options lacks any checks against the length field of the header, allowing attackers to put the function into an infinite loop by supplying arbitrary length values.

• CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.