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Vulnerability & Exploit Database

Vulnerabilities and exploits collected over reliable resources for security professionals and researchers to review

Docker CE: Improper Limitation of a Pathname to a Restricted Directory ("Path Traversal") (CVE-2021-21284)

Severity:
3
CVSS:
(AV:A/AC:L/Au:S/C:N/I:P/A:N)
Published:
02/02/2020
Created:
02/18/2020
Added:
02/17/2020
Modified:
02/17/2020

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

Solution(s)


  • docker-ce-upgrade-19_03_15
  • docker-ce-upgrade-20_10_3

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