Learn-about-cve-2025-31133-poc

Learn-about-cve-2025-31133-poc Overview A proof-of-concept demonstration and learning environment for CVE-2025-31133 , a security vulnerability in runc that allows bypassing maskedPaths protection through a race condition. maskedPaths are designed to prevent containers from accessing sensitive ho...

CVE-2025-31133

CVE-2025-31133 PoC Exploit This document explains the functionality of the provided Proof-of-Concept PoC script for the runc vulnerability CVE-2025-31133. Summary Vulnerability: CVE-2025-31133 - A symbolic link race condition in runc's maskedPaths handling. Impact: A malicious container can bypas...

CVE-2025-31133

runc is a CLI tool for spawning and running containers according to the OCI specification. In versions 1.2.7 and below, 1.3.0-rc.1 through 1.3.1, 1.4.0-rc.1 and 1.4.0-rc.2 files, runc would not perform sufficient verification that the source of the bind-mount i.e., the container's /dev/null was...

CVE-2025-31133

runc is a CLI tool for spawning and running containers according to the OCI specification. In versions 1.2.7 and below, 1.3.0-rc.1 through 1.3.1, 1.4.0-rc.1 and 1.4.0-rc.2 files, runc would not perform sufficient verification that the source of the bind-mount i.e., the container's /dev/null was...

Exploit for CVE-2025-31133

CVE-2025-31133 runc maskedPaths Exploit PoC WARNING:...

Race Condition Enabling Link Following

Overview Affected versions of this package are vulnerable to Race Condition Enabling Link Following via a race condition in the maskedPaths feature. An attacker can gain unauthorized access to host files, execute arbitrary code with elevated privileges, or cause a denial of service by manipulatin...

rootless: `/sys/fs/cgroup` is writable when cgroupns isn't unshared in runc

Impact It was found that rootless runc makes /sys/fs/cgroup writable in following conditons: 1. when runc is executed inside the user namespace, and the config.json does not specify the cgroup namespace to be unshared e.g.., docker|podman|nerdctl run --cgroupns=host, with Rootless...

GHSA-M8CG-XC2P-R3FC rootless: `/sys/fs/cgroup` is writable when cgroupns isn't unshared in runc

Impact It was found that rootless runc makes /sys/fs/cgroup writable in following conditons: 1. when runc is executed inside the user namespace, and the config.json does not specify the cgroup namespace to be unshared e.g.., docker|podman|nerdctl run --cgroupns=host, with Rootless...

Design/Logic Flaw

runc is a CLI tool for spawning and running containers according to the OCI specification. In affected versions it was found that rootless runc makes /sys/fs/cgroup writable in following conditons: 1. when runc is executed inside the user namespace, and the config.json does not specify the cgroup...

CVE-2023-25809 rootless: `/sys/fs/cgroup` is writable when cgroupns isn't unshared in runc

runc is a CLI tool for spawning and running containers according to the OCI specification. In affected versions it was found that rootless runc makes /sys/fs/cgroup writable in following conditons: 1. when runc is executed inside the user namespace, and the config.json does not specify the cgroup...

CVE-2023-25809

CVE-2023-25809 affects runc (rootless and certain host configurations) where rootless runc can make /sys/fs/cgroup writable under two conditions: 1) inside a user namespace without unsharing cgroup namespace (e.g., docker/podman/nerdctl run --cgroupns=host), or 2) outside the user namespace with ...

CVE-2023-25809

runc is a CLI tool for spawning and running containers according to the OCI specification. In affected versions it was found that rootless runc makes /sys/fs/cgroup writable in following conditons: 1. when runc is executed inside the user namespace, and the config.json does not specify the cgroup...