CVE-2021-41103
Insufficiently restricted permissions on plugin directories
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
Description
containerd is an open source container runtime with an emphasis on simplicity, robustness and portability. A bug was found in containerd where container root directories and some plugins had insufficiently restricted permissions, allowing otherwise unprivileged Linux users to traverse directory contents and execute programs. When containers included executable programs with extended permission bits (such as setuid), unprivileged Linux users could discover and execute those programs. When the UID of an unprivileged Linux user on the host collided with the file owner or group inside a container, the unprivileged Linux user on the host could discover, read, and modify those files. This vulnerability has been fixed in containerd 1.4.11 and containerd 1.5.7. Users should update to these version when they are released and may restart containers or update directory permissions to mitigate the vulnerability. Users unable to update should limit access to the host to trusted users. Update directory permission on container bundles directories.
Timeline
ID reserved
By GitHub_M
- 19 days later
· 19 days later
Published
- 3 years later
· 3 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.0 | Medium5.9 | CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.52% · top 56% of all CVEs (7 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.9.
Weakness
Affected products
- affected < 1.4.11
- affected >= 1.5.0, < 1.5.7
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gogithub.com/containerd/containerdGHSA-c2h3-6mxw-7mvq (opens in a new tab)
References (7)
- https://github.com/containerd/containerd/security/advisories/GHSA-c2h3-6mxw-7mvq (opens in a new tab)x_transferred
- https://github.com/containerd/containerd/commit/5b46e404f6b9f661a205e28d59c982d3634148f8 (opens in a new tab)x_transferred
- FEDORA-2021-df975338d4 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2021-b5a9a481a2 (opens in a new tab)vendor-advisoryx_transferred
- DSA-5002 (opens in a new tab)vendor-advisoryx_transferred
- https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf (opens in a new tab)x_transferred
- GLSA-202401-31 (opens in a new tab)vendor-advisoryx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-c2h3-6mxw-7mvq (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-41103)Record last updated .