Vulnerability Database
289,599
Total vulnerabilities in the database
CVE-2021-21284
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.
| Software | From | Fixed in |
|---|---|---|
| docker / docker | 20.0.0 | 20.10.3 |
| docker / docker | - | 19.03.15 |
| debian / debian_linux | 10.0 | 10.0.x |
| netapp / e-series_santricity_os_controller | 11.0.0 | 11.60.3.x |
github.com/moby/moby
|
- | 19.3.15 |
|
github.com/moby/moby
|
20.10.0-beta1 | 20.10.3 |
- 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
- https://security.gentoo.org/glsa/202107-23
- https://security.netapp.com/advisory/ntap-20210226-0005
- https://security.netapp.com/advisory/ntap-20210226-0005/
- https://www.debian.org/security/2021/dsa-4865