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CVE-2014-4014 is a flaw in the Linux kernel capabilities implementation affecting versions before 3.14.8. The implementation incorrectly applies user-namespace capability considerations to inode permission checks, despite inodes not being namespaced. A local user can create a user namespace and bypass intended chmod restrictions, including setting the setgid bit on a file whose group is root.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (1 hidden).
This repository contains a proof-of-concept (PoC) exploit for CVE-2014-4014, a local privilege escalation vulnerability in the Linux kernel. The repository consists of a single C source file ('cve-2014-4014.c') and a README linking to a blog post with further details. The exploit works by creating a new user namespace and manipulating the UID mapping via '/proc/[pid]/uid_map'. It then sets the setgid bit on a user-specified file, which can be used to escalate privileges. The exploit must be run locally on a vulnerable Linux system, and the user must provide a file path as an argument. The code is concise and demonstrates the vulnerability without weaponization or automation, making it a classic PoC. No network endpoints are present; the only fingerprintable endpoint is the use of the '/proc/[pid]/uid_map' file.
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1 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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