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.

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2025-ec760de8e2 advisory.

    Update to master to fix CVE-2025-34451

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2025-58fe871812 advisory.

    Update to master to fix CVE-2025-34451

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2025-34451)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
281833	Fedora 42 : proxychains-ng (2025-ec760de8e2)	Nessus	Fedora Local Security Checks	medium
281828	Fedora 43 : proxychains-ng (2025-58fe871812)	Nessus	Fedora Local Security Checks	medium
279421	Linux Distros Unpatched Vulnerability : CVE-2025-34451	Nessus	Misc.	medium

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CVE-2025-34451

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