CVE-2022-31793 Information

Description

do_request in request.c in muhttpd before 1.1.7 allows remote attackers to read arbitrary files by constructing a URL with a single character before a desired path on the filesystem. This occurs because the code skips over the first character when serving files. Arris NVG443 NVG599 NVG589 and NVG510 devices and Arris-derived BGW210 and BGW320 devices are affected.

Reference

https://derekabdine.com/blog/2022-arris-advisory https://blog.malwarebytes.com/exploits-and-vulnerabilities/2022/08/millions-of-arris-routers-are-vulnerable-to-path-traversal-attacks/ https://kb.cert.org/vuls/id/495801 http://inglorion.net/software/muhttpd/