Docker CE: Improper Limitation of a Pathname to a Restricted Directory ("Path Traversal") (CVE-2021-21284)
Severity:
CVSS:
Published:
Created:
Added:
Modified:
Description:
In Docker before versions 9.03.15, 20.10.3 there is a vulnerability involving the --userns-remap option in which access to remapped root allows privilege escalation to real root. When using "--userns-remap", if the root user in the remapped namespace has access to the host filesystem they can modify files under "/var/lib/docker/
Solution(s)
- docker-ce-upgrade-19_03_15
- docker-ce-upgrade-20_10_3
Reference(s)
- https://attackerkb.com/topics/cve-2021-21284
- CVE - 2021-21284
- https://docs.docker.com/engine/release-notes/#20103
- https://github.com/moby/moby/commit/64bd4485b3a66a597c02c95f5776395e540b2c7c
- https://github.com/moby/moby/releases/tag/v19.03.15
- https://github.com/moby/moby/releases/tag/v20.10.3
- https://github.com/moby/moby/security/advisories/GHSA-7452-xqpj-6rpc
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