Vulnerability Description
runc is a CLI tool for spawning and running containers on Linux according to the OCI specification. A bug was found in runc prior to version 1.1.2 where `runc exec --cap` created processes with non-empty inheritable Linux process capabilities, creating an atypical Linux environment and enabling programs with inheritable file capabilities to elevate those capabilities to the permitted set during execve(2). This bug did not affect the container security sandbox as the inheritable set never contained more capabilities than were included in the container's bounding set. This bug has been fixed in runc 1.1.2. This fix changes `runc exec --cap` behavior such that the additional capabilities granted to the process being executed (as specified via `--cap` arguments) do not include inheritable capabilities. In addition, `runc spec` is changed to not set any inheritable capabilities in the created example OCI spec (`config.json`) file.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linuxfoundation | Runc | < 1.1.2 |
| Fedoraproject | Fedora | 34 |
Related Weaknesses (CWE)
References
- https://github.com/opencontainers/runc/commit/d04de3a9b72d7a2455c1885fc75eb36d02PatchThird Party Advisory
- https://github.com/opencontainers/runc/releases/tag/v1.1.2Release NotesThird Party Advisory
- https://github.com/opencontainers/runc/security/advisories/GHSA-f3fp-gc8g-vw66Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/03/msg00023.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://github.com/opencontainers/runc/commit/d04de3a9b72d7a2455c1885fc75eb36d02PatchThird Party Advisory
- https://github.com/opencontainers/runc/releases/tag/v1.1.2Release NotesThird Party Advisory
- https://github.com/opencontainers/runc/security/advisories/GHSA-f3fp-gc8g-vw66Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/03/msg00023.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
FAQ
What is CVE-2022-29162?
CVE-2022-29162 is a vulnerability with a CVSS score of 5.9 (MEDIUM). runc is a CLI tool for spawning and running containers on Linux according to the OCI specification. A bug was found in runc prior to version 1.1.2 where `runc exec --cap` created processes with non-em...
How severe is CVE-2022-29162?
CVE-2022-29162 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-29162?
Check the references section above for vendor advisories and patch information. Affected products include: Linuxfoundation Runc, Fedoraproject Fedora.