Description (CNA)
crun is an open source OCI Container Runtime fully written in C. Prior to version 1.28, crun's default device setup opens the container rootfs `/dev` directory without `O_NOFOLLOW`. If an OCI bundle contains `rootfs/dev` as a symlink and the bundle configuration does not mount `/dev`, crun follows that symlink and creates the default device nodes and stdio symlinks at the symlink target outside the container rootfs. In a local rootful crun replay, this created fixed device nodes and symlinks outside the rootfs before crun returned failure. A pre-existing file named `ptmx` in the target directory was also replaced by crun's forced `ptmx -> pts/ptmx` symlink. Version 1.28 fixes the issue.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| containers / crun | affected < 1.28 |
CWE
CWE-61
References
- https://github.com/containers/crun/security/advisories/GHSA-7vwr-4279-7gq5
- https://github.com/containers/crun/releases/tag/1.28
ADP enrichment
No English description supplied.
No references supplied.