UBUNTU-CVE-2024-21626

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UBUNTU-CVE-2024-21626

Summary:

Details: 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 ("attack 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 ("attack 1"). Variants of attacks 1 and 2 could be also be used to overwrite semi-arbitrary host binaries, allowing for complete container escapes ("attack 3a" and "attack 3b"). runc 1.1.12 includes patches for this issue.

References: https://ubuntu.com/security/CVE-2024-21626, https://github.com/opencontainers/runc/security/advisories/GHSA-xr7r-f8xq-vfvv, https://ubuntu.com/security/notices/USN-6619-1, https://www.cve.org/CVERecord?id=CVE-2024-21626