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Security Advisories: GSA_kwCzR0hTQS1jMmgzLTZteHctN212cc0WHg
Insufficiently restricted permissions on plugin directories
Impact
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.
Patches
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.
Workarounds
Limit access to the host to trusted users. Update directory permission on container bundles directories.
For more information
If you have any questions or comments about this advisory:
- Open an issue in github.com/containerd/containerd
- Email us at [email protected]
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1jMmgzLTZteHctN212cc0WHg
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: over 2 years ago
Updated: 3 months ago
CVSS Score: 5.9
CVSS vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Identifiers: GHSA-c2h3-6mxw-7mvq, CVE-2021-41103
References:
- https://github.com/containerd/containerd/security/advisories/GHSA-c2h3-6mxw-7mvq
- https://nvd.nist.gov/vuln/detail/CVE-2021-41103
- https://github.com/containerd/containerd/commit/5b46e404f6b9f661a205e28d59c982d3634148f8
- https://lists.fedoraproject.org/archives/list/[email protected]/message/ZNFADTCHHYWVM6W4NJ6CB4FNFM2VMBIB/
- https://lists.fedoraproject.org/archives/list/[email protected]/message/B5Q6G6I4W5COQE25QMC7FJY3I3PAYFBB/
- https://www.debian.org/security/2021/dsa-5002
- https://github.com/containerd/containerd/releases/tag/v1.4.11
- https://github.com/containerd/containerd/releases/tag/v1.5.7
- https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B5Q6G6I4W5COQE25QMC7FJY3I3PAYFBB/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNFADTCHHYWVM6W4NJ6CB4FNFM2VMBIB/
- https://security.gentoo.org/glsa/202401-31
- https://github.com/advisories/GHSA-c2h3-6mxw-7mvq
Blast Radius: 26.1
Affected Packages
go:github.com/containerd/containerd
Dependent packages: 7,158Dependent repositories: 26,380
Downloads:
Affected Version Ranges: >= 1.5.0, < 1.5.7, < 1.4.11
Fixed in: 1.5.7, 1.4.11
All affected versions: 0.1.0, 0.2.0, 0.2.1, 0.2.2, 0.2.3, 0.2.4, 0.2.5, 0.2.6, 0.2.7, 0.2.8, 0.2.9, 1.0.0, 1.0.1, 1.0.2, 1.0.3, 1.1.0, 1.1.1, 1.1.2, 1.1.3, 1.1.4, 1.1.5, 1.1.6, 1.1.7, 1.1.8, 1.2.0, 1.2.1, 1.2.2, 1.2.3, 1.2.4, 1.2.5, 1.2.6, 1.2.7, 1.2.8, 1.2.9, 1.2.10, 1.2.11, 1.2.12, 1.2.13, 1.2.14, 1.3.0, 1.3.1, 1.3.2, 1.3.3, 1.3.4, 1.3.5, 1.3.6, 1.3.7, 1.3.8, 1.3.9, 1.3.10, 1.4.0, 1.4.1, 1.4.2, 1.4.3, 1.4.4, 1.4.5, 1.4.6, 1.4.7, 1.4.8, 1.4.9, 1.4.10, 1.5.0, 1.5.1, 1.5.2, 1.5.3, 1.5.4, 1.5.5, 1.5.6
All unaffected versions: 1.4.11, 1.4.12, 1.4.13, 1.5.7, 1.5.8, 1.5.9, 1.5.10, 1.5.11, 1.5.12, 1.5.13, 1.5.14, 1.5.15, 1.5.16, 1.5.17, 1.5.18, 1.6.0, 1.6.1, 1.6.2, 1.6.3, 1.6.4, 1.6.5, 1.6.6, 1.6.7, 1.6.8, 1.6.9, 1.6.10, 1.6.11, 1.6.12, 1.6.13, 1.6.14, 1.6.15, 1.6.16, 1.6.17, 1.6.18, 1.6.19, 1.6.20, 1.6.21, 1.6.22, 1.6.23, 1.6.24, 1.6.25, 1.6.26, 1.6.27, 1.7.0, 1.7.1, 1.7.2, 1.7.3, 1.7.4, 1.7.5, 1.7.6, 1.7.7, 1.7.8, 1.7.9, 1.7.10, 1.7.11, 1.7.12