EUVD-2024-2176 · Published Jun 10, 2024
docker cp allows unexpected chmod of host files in Moby Docker Engine
Impact
A bug was found in Moby (Docker Engine) where attempting to copy files using docker cp into a specially-crafted container can result in Unix file permission changes for existing files in the host’s filesystem, widening access to others. This bug does not directly allow files to be read, modified, or executed without an additional cooperating process.
Patches
This bug has been fixed in Moby (Docker Engine) 20.10.9. Users should update to this version as soon as possible. Running containers do not need to be restarted.
Workarounds
Ensure you only run trusted containers.
Credits
The Moby project would like to thank Lei Wang and Ruizhi Xiao for responsibly disclosing this issue in accordance with the Moby security policy.
For more information
If you have any questions or comments about this advisory:
- Open an issue
- Email us at security@docker.com if you think you’ve found a security bug
Technologies
Weaknesses
CVSS scores
- v3.12.8
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N
MITRE ATT&CK
InferredWhere this vulnerability fits in an attack
References
- https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf
- https://github.com/moby/moby/commit/bce32e5c93be4caf1a592582155b9cb837fc129a
- https://github.com/moby/moby/security/advisories/GHSA-v994-f8vw-g7j4
- 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://nvd.nist.gov/vuln/detail/CVE-2021-41089
Potentially impacted assets
See if this affects your attack surface
