U.S. flag   An official website of the United States government
Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock (Dot gov) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

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

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to nvd@nist.gov.

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

CPEs loading, please wait.

Denotes Vulnerable Software
Are we missing a CPE here? Please let us know.

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.