Vulnerability 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 ("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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linuxfoundation | Runc | < 1.1.12 |
| Fedoraproject | Fedora | 39 |
Related Weaknesses (CWE)
References
- http://packetstormsecurity.com/files/176993/runc-1.1.11-File-Descriptor-Leak-PriExploitThird Party AdvisoryVDB Entry
- http://www.openwall.com/lists/oss-security/2024/02/01/1Mailing List
- http://www.openwall.com/lists/oss-security/2024/02/02/3Mailing List
- https://github.com/opencontainers/runc/commit/02120488a4c0fc487d1ed2867e901eeed7Patch
- https://github.com/opencontainers/runc/releases/tag/v1.1.12Release Notes
- https://github.com/opencontainers/runc/security/advisories/GHSA-xr7r-f8xq-vfvvExploitVendor Advisory
- https://lists.debian.org/debian-lts-announce/2024/02/msg00005.html
- https://lists.fedoraproject.org/archives/list/[email protected]
- https://lists.fedoraproject.org/archives/list/[email protected]Mailing List
- http://packetstormsecurity.com/files/176993/runc-1.1.11-File-Descriptor-Leak-PriExploitThird Party AdvisoryVDB Entry
- http://www.openwall.com/lists/oss-security/2024/02/01/1Mailing List
- http://www.openwall.com/lists/oss-security/2024/02/02/3Mailing List
- https://github.com/opencontainers/runc/commit/02120488a4c0fc487d1ed2867e901eeed7Patch
- https://github.com/opencontainers/runc/releases/tag/v1.1.12Release Notes
- https://github.com/opencontainers/runc/security/advisories/GHSA-xr7r-f8xq-vfvvExploitVendor Advisory
FAQ
What is CVE-2024-21626?
CVE-2024-21626 is a vulnerability with a CVSS score of 8.6 (HIGH). 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...
How severe is CVE-2024-21626?
CVE-2024-21626 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2024-21626?
Check the references section above for vendor advisories and patch information. Affected products include: Linuxfoundation Runc, Fedoraproject Fedora.