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
Configurations
History
31 Dec 2025, 17:45
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.8 |
| CPE | cpe:2.3:a:proxychains-ng_project:proxychains-ng:*:*:*:*:*:*:*:* | |
| First Time |
Proxychains-ng Project
Proxychains-ng Project proxychains-ng |
|
| CWE | CWE-787 | |
| References | () https://github.com/httpsgithu/proxychains-ng/commit/cc005b7 - Patch | |
| References | () https://github.com/marlinkcyber/advisories/blob/main/advisories/MCSAID-2025-008-proxychains-ng-stack-buffer-overflow-proxy_from_string.md - Exploit, Third Party Advisory | |
| References | () https://github.com/rofl0r/proxychains-ng/issues/606 - Exploit, Patch | |
| References | () https://www.vulncheck.com/advisories/rofl0r-proxychains-ng-stack-based-buffer-overflow - Third Party Advisory |
18 Dec 2025, 22:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-12-18 22:15
Updated : 2025-12-31 17:45
NVD link : CVE-2025-34451
Mitre link : CVE-2025-34451
CVE.ORG link : CVE-2025-34451
JSON object : View
Products Affected
proxychains-ng_project
- proxychains-ng