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3 results tagged local privilege escalation
Project Glasswing's Claude Mythos AI identified a local privilege escalation (LPE) flaw in the Linux kernel. Any attacker who already has unprivileged shell access to an affected host can use this vulnerability to gain root. Cloud VMs, containers sharing a kernel, and CI/CD runners are all in scope. Here is the full technical and remediation picture for security teams.
CVE-2021-4034, named PwnKit by Qualys, is an out-of-bounds write vulnerability in pkexec, a SUID-root binary part of the polkit framework installed by default on virtually every Linux distribution. Any local unprivileged user can exploit it to gain root without any sudo permissions, without knowing any password, and without triggering standard auth log entries. Present since May 2009.
CVE-2021-3156, named Baron Samedit, is a heap-based buffer overflow in the sudo utility that allows any unprivileged local user to gain root privileges without authentication, without being listed in the sudoers file, and without any race condition. Present in sudo for nearly 10 years, it affects every major Linux distribution. Qualys developed working exploits for Ubuntu 20.04, 18.04, Debian 10, and Fedora 33 default installations.
