CVE-2024-42987: tenda fh1206_firmware Out-of-bounds Write

Vulnerability summary

CVE-2024-42987 is a high (CVSS 7.5) Out-of-bounds Write vulnerability in tenda fh1206_firmware. EPSS estimates a 1.31% chance of exploitation in the next 30 days, higher than 70.3% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 15-08-2024
   PublishedVulnerability first disclosed.
2. 02-09-2025
   Last modifiedVulnerability information updated.

Description

Tenda FH1206 v02.03.01.35 was discovered to contain a stack-based buffer overflow vulnerability in the fromPptpUserAdd function. The vulnerability can be triggered via the modino, username, newpwd, or pptpdnetseg parameters, all of which are passed via HTTP POST and used in unsafe sprintf calls without proper length validation. A remote attacker can exploit this flaw through a crafted POST request, which may cause a Denial of Service (DoS). In certain scenarios, this issue could potentially be leveraged to achieve remote code execution.

• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.