moby Access to remapped root allows privilege escalation to real root

Impact 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. Patches Versions 20.10.3 and 19.03.15 contain patches that prevent privilege escalation fr...

SUSE CVE-2021-21285

In Docker before versions 9.03.15, 20.10.3 there is a vulnerability in which pulling an intentionally malformed Docker image manifest crashes the dockerd daemon. Versions 20.10.3 and 19.03.15 contain patches that prevent the daemon from crashing...

Vulnerabilities fixed in Docker

Vulnerabilities have been fixed in Docker. A local malicious person can, by exploiting the vulnerability with attribute CVE-2021-21284, gain root privileges from the container on the vulnerable system. To exploit this vulnerability, the Docker daemon must be configured with the --userns-remap...

CVE-2021-21284

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...