Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Proxychains-Ng Project | Proxychains-Ng | <= 4.17 |
Related Weaknesses (CWE)
References
- https://github.com/httpsgithu/proxychains-ng/commit/cc005b7Patch
- https://github.com/marlinkcyber/advisories/blob/main/advisories/MCSAID-2025-008-ExploitThird Party Advisory
- https://github.com/rofl0r/proxychains-ng/issues/606ExploitPatch
- https://www.vulncheck.com/advisories/rofl0r-proxychains-ng-stack-based-buffer-ovThird Party Advisory
- https://github.com/marlinkcyber/advisories/blob/main/advisories/MCSAID-2025-008-ExploitThird Party Advisory
FAQ
What is CVE-2025-34451?
CVE-2025-34451 is a vulnerability with a CVSS score of 7.8 (HIGH). 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/libproxychain...
How severe is CVE-2025-34451?
CVE-2025-34451 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-34451?
Check the references section above for vendor advisories and patch information. Affected products include: Proxychains-Ng Project Proxychains-Ng.