CVE-2021-41089: low-severity vulnerability in moby
`docker cp` allows unexpected chmod of host files
Published · Updated
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8Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 2.8epss 0.3%
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.
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N
Affected products
moby · mobyRelated CVEs — moby
In the same product, most dangerous first.
CVE-2024-41110CRITICALMoby authz zero length regressionEPSS 16.5%CVE-2026-34040HIGHMoby: AuthZ plugin bypass with oversized request bodyEPSS 9.3%CVE-2021-21285MEDIUMDocker daemon crash during image pull of malicious imageEPSS 3.3%CVE-2021-41091MEDIUMInsufficiently restricted permissions on data directory in Docker EngineEPSS 2.8%CVE-2023-28840HIGHmoby/moby's dockerd daemon encrypted overlay network may be unauthenticatedEPSS 2.6%CVE-2023-28842MEDIUMmoby/moby's dockerd daemon encrypted overlay network with a single endpoint is unauthenticatedEPSS 1.4%
References
https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdfhttps://github.com/moby/moby/commit/bce32e5c93be4caf1a592582155b9cb837fc129ahttps://github.com/moby/moby/security/advisories/GHSA-v994-f8vw-g7j4https://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/