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Security Advisories

CVE-2021-21284

NVD

https://nvd.nist.gov/vuln/detail/CVE-2021-21284

Severity

6.8

Medium

CVSS V3

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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.

References

Affected packages


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