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CVE-2021-21284 Detail

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.


Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://docs.docker.com/engine/release-notes/#20103 Release Notes  Vendor Advisory 
https://github.com/moby/moby/commit/64bd4485b3a66a597c02c95f5776395e540b2c7c Patch  Third Party Advisory 
https://github.com/moby/moby/releases/tag/v19.03.15 Release Notes  Third Party Advisory 
https://github.com/moby/moby/releases/tag/v20.10.3 Release Notes  Third Party Advisory 
https://github.com/moby/moby/security/advisories/GHSA-7452-xqpj-6rpc Third Party Advisory 
https://security.gentoo.org/glsa/202107-23 Patch  Third Party Advisory 
https://security.netapp.com/advisory/ntap-20210226-0005/ Third Party Advisory 
https://www.debian.org/security/2021/dsa-4865 Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') cwe source acceptance level NIST   GitHub, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

8 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-21284
NVD Published Date:
02/02/2021
NVD Last Modified:
04/29/2022
Source:
GitHub, Inc.