CVE-2021-41089
Description
Moby is an open-source project created by Docker to enable software containerization. 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. 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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Arch Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Fixed | 1:20.10.9-1 |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 20.10.10+dfsg1-1 |
| sid | Fixed | 20.10.10+dfsg1-1 |
| forky | Fixed | 20.10.10+dfsg1-1 |
| bullseye | Fixed | 20.10.5+dfsg1-1+deb11u1 |
| bookworm | Fixed | 20.10.10+dfsg1-1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Go | github.com/docker/docker | <20.10.9 | 20.10.9 |
| Go | github.com/docker/docker | <20.10.9+incompatible | 20.10.9+incompatible |
| Go | github.com/moby/moby | <20.10.9+incompatible | 20.10.9+incompatible |
References
- https://security-tracker.debian.org/tracker/CVE-2021-41089
- https://www.suse.com/security/cve/CVE-2021-41089.html
- https://github.com/moby/moby/security/advisories/GHSA-v994-f8vw-g7j4
- https://nvd.nist.gov/vuln/detail/CVE-2021-41089
- https://github.com/moby/moby/commit/bce32e5c93be4caf1a592582155b9cb837fc129a
- https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf
- https://github.com/moby/moby
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/B5Q6G6I4W5COQE25QMC7FJY3I3PAYFBB
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZNFADTCHHYWVM6W4NJ6CB4FNFM2VMBIB
- https://pkg.go.dev/vuln/GO-2024-2913
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.