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rofl0r/proxychains-ng <= 4.17 Stack-based Buffer Overflow
rofl0r/proxychains-ng versions up to and including 4.17 and prior to commit cc005b7 contain a stack-based buffer overflow vulnerability in the function proxy_from_string() located in src/libproxychains.c. When parsing crafted proxy configuration entries containing overly long username or password fields, the application may write beyond the bounds of fixed-size stack buffers, leading to memory corruption or crashes. This vulnerability may allow denial of service and, under certain conditions, could be leveraged for further exploitation depending on the execution environment and applied mitigations.
References
- https://github.com/httpsgithu/proxychains-ng/commit/cc005b7 patch
- https://www.vulncheck.com/advisories/rofl0r-proxychains-ng-stack-based-buffer-o… third-party-advisory
- https://github.com/marlinkcyber/advisories/blob/main/advisories/MCSAID-2025-008… technical-description exploit
- https://github.com/rofl0r/proxychains-ng/issues/606 issue-tracking
- https://github.com/marlinkcyber/advisories/blob/main/advisories/MCSAID-2025-008… exploit
- https://github.com/marlinkcyber/advisories/blob/main/advisories/MCSAID-2025-008… technical-description exploit
- https://github.com/rofl0r/proxychains-ng/issues/606 issue-tracking
- https://github.com/httpsgithu/proxychains-ng/commit/cc005b7 patch
- https://www.vulncheck.com/advisories/rofl0r-proxychains-ng-stack-based-buffer-o… third-party-advisory
- https://github.com/marlinkcyber/advisories/blob/main/advisories/MCSAID-2025-008… exploit
Affected products
proxychains-ng
- ==commit cc005b7
- =<4.17
Matching in nixpkgs
pkgs.proxychains-ng
Preloader which hooks calls to sockets in dynamically linked programs and redirects it through one or more socks/http proxies
Package maintainers
-
@usertam Samuel Tam <code@usertam.dev>
-
@ZenithalHourlyRate zenithal <i@zenithal.me>