CVE-2021-21284
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in go/github.com/moby/moby
GHSA-7452-xqpj-6rpc, CVE-2021-21284
go/github.com/moby/moby
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
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.
All versions before 19.3.15, all versions starting from 20.10.0-beta1 before 20.10.3
Upgrade to versions 19.3.15, 20.10.3 or above.
2024-02-01
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