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/<remapping>" that cause writing files with extended privileges. Versions 20.10.3 and 19.03.15 contain patches that prevent privilege escalation from remapped user.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
moby moby
< 19.03.15affected>= 20.0.0, < 20.10.3affected
References
- https://docs.docker.com/engine/release-notes/#20103 ↗
- https://github.com/moby/moby/releases/tag/v20.10.3 ↗
- https://github.com/moby/moby/releases/tag/v19.03.15 ↗
- https://github.com/moby/moby/security/advisories/GHSA-7452-xqpj-6rpc ↗
- https://github.com/moby/moby/commit/64bd4485b3a66a597c02c95f5776395e540b2c7c ↗
- https://security.netapp.com/advisory/ntap-20210226-0005/ ↗
- https://www.debian.org/security/2021/dsa-4865 ↗
- https://security.gentoo.org/glsa/202107-23 ↗