CVE-2024-8408: Linksys WRT54G POST Parameter apply.cgi validate_services_port stack-based overflow

Vulnerability summary

CVE-2024-8408 is a critical (CVSS 9.8) Stack-based Buffer Overflow vulnerability in linksys wrt54g. EPSS estimates a 0.75% chance of exploitation in the next 30 days, higher than 54.4% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 04-09-2024
   PublishedVulnerability first disclosed.
2. 04-09-2024
   Last modifiedVulnerability information updated.

Description

A vulnerability was found in Linksys WRT54G 4.21.5. It has been rated as critical. Affected by this issue is the function validate_services_port of the file /apply.cgi of the component POST Parameter Handler. The manipulation of the argument services_array leads to stack-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

• CWE-121Stack-based Buffer OverflowA stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.