CVE-2025-34451rofl0r/proxychains-ng <= 4.17 Stack-based Buffer Overflow
Updated under an hour ago ()
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It affects rofl0r proxychains-ng and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
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
- 6.9 MEDIUM (v4.0, CNA)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
- Weakness (CWE)
- CWE-121
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Analyzed
- Record last updated
- May 13, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
rofl0r proxychains-ng rofl0r:proxychains_ng (from the name) | through 4.17; cc005b7132811c9149e77b5e33cff359fc95512e not affected | CNA record |
proxychains-ng_project proxychains-ng proxychains-ng_project:proxychains-ng | through 4.17 | NVD |
References
- https://github.com/marlinkcyber/advisories/blob/main/advisories/MCSAID-2025-008-proxychains-ng-stack-buffer-overflow-proxy_from_string.mdtechnical-description, exploit, third-party-advisory
- https://github.com/rofl0r/proxychains-ng/issues/606issue-tracking, exploit, patch
- https://github.com/httpsgithu/proxychains-ng/commit/cc005b7patch
- https://www.vulncheck.com/advisories/rofl0r-proxychains-ng-stack-based-buffer-overflowthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.