CVE-2021-21284
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-21284
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-21284.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-21284
- Aliases
- Related
- Published
- 2021-02-02T18:15:11Z
- Modified
- 2024-09-18T01:00:21Z
- Severity
-
- 6.8 (Medium) CVSS_V3 - CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N CVSS Calculator
- Summary
- [none]
- Details
-
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.
- References
-
- https://docs.docker.com/engine/release-notes/#20103
- 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://www.debian.org/security/2021/dsa-4865
- 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://security-tracker.debian.org/tracker/CVE-2021-21284
Affected packages
Debian:11 / docker.io
Package
- Name
- docker.io
- Purl
- pkg:deb/debian/docker.io?arch=source
Debian:12 / docker.io
Package
- Name
- docker.io
- Purl
- pkg:deb/debian/docker.io?arch=source
Debian:13 / docker.io
Package
- Name
- docker.io
- Purl
- pkg:deb/debian/docker.io?arch=source