Executive Summary



This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Informations
Name CVE-2021-21284 First vendor Publication 2021-02-02
Vendor Cve Last vendor Modification 2022-04-29

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N
Overall CVSS Score 6.8
Base Score 6.8 Environmental Score 6.8
impact SubScore 4 Temporal Score 6.8
Exploitabality Sub Score 2.3
 
Attack Vector Adjacent Attack Complexity Low
Privileges Required Low User Interaction None
Scope Changed Confidentiality Impact None
Integrity Impact High Availability Impact None
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:A/AC:L/Au:S/C:N/I:P/A:N)
Cvss Base Score 2.7 Attack Range Adjacent network
Cvss Impact Score 2.9 Attack Complexity Low
Cvss Expoit Score 5.1 Authentication Requires single instance
Calculate full CVSS 2.0 Vectors scores

Detail

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/" that cause writing files with extended privileges. Versions 20.10.3 and 19.03.15 contain patches that prevent privilege escalation from remapped user.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21284

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (CWE/SANS Top 25)

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 378
Application 18
Os 1

Sources (Detail)

Source Url
CONFIRM https://github.com/moby/moby/security/advisories/GHSA-7452-xqpj-6rpc
https://security.netapp.com/advisory/ntap-20210226-0005/
DEBIAN https://www.debian.org/security/2021/dsa-4865
GENTOO https://security.gentoo.org/glsa/202107-23
MISC 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

Alert History

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Date Informations
2022-11-08 01:54:33
  • Multiple Updates
2022-05-14 01:54:00
  • Multiple Updates
2022-04-30 02:06:54
  • Multiple Updates
2021-08-05 01:41:56
  • Multiple Updates
2021-07-10 12:40:20
  • Multiple Updates
2021-05-04 14:07:40
  • Multiple Updates
2021-04-22 03:12:42
  • Multiple Updates
2021-03-26 12:37:59
  • Multiple Updates
2021-02-10 21:23:29
  • Multiple Updates
2021-02-03 00:23:05
  • Multiple Updates
2021-02-02 21:23:38
  • First insertion