CVE-2024-21626 Information

Description

runc is a CLI tool for spawning and running containers on Linux according to the OCI specification. In runc 1.1.11 and earlier due to an internal file descriptor leak an attacker could cause a newly-spawned container process (from runc exec) to have a working directory in the host filesystem namespace allowing for a container escape by giving access to the host filesystem (ttack 2). The same attack could be used by a malicious image to allow a container process to gain access to the host filesystem through runc run (ttack 1). Variants of attacks 1 and 2 could be also be used to overwrite semi-arbitrary host binaries allowing for complete container escapes (ttack 3a\ and ttack 3b). runc 1.1.12 includes patches for this issue.

Reference

https://github.com/opencontainers/runc/security/advisories/GHSA-xr7r-f8xq-vfvv https://github.com/opencontainers/runc/commit/02120488a4c0fc487d1ed2867e901eeed7ce8ecf https://github.com/opencontainers/runc/releases/tag/v1.1.12 http://www.openwall.com/lists/oss-security/2024/02/01/1