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.
History

Thu, 18 Dec 2025 22:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 18 Dec 2025 21:30:00 +0000

Type Values Removed Values Added
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.
Title rofl0r/proxychains-ng <= 4.17 Stack-based Buffer Overflow
Weaknesses CWE-121
References
Metrics cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2025-12-18T21:38:07.266Z

Reserved: 2025-04-15T19:15:22.602Z

Link: CVE-2025-34451

cve-icon Vulnrichment

Updated: 2025-12-18T21:38:01.915Z

cve-icon NVD

Status : Received

Published: 2025-12-18T22:15:56.320

Modified: 2025-12-18T22:15:56.320

Link: CVE-2025-34451

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.