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1.3 KiB
CVE-2021-21284
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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.
POC
Reference
No PoCs from references.
Github
- https://github.com/ARPSyndicate/cvemon
- https://github.com/adavarski/HomeLab-Proxmox-k8s-DevSecOps-playground
- https://github.com/adavarski/HomeLab-k8s-DevSecOps-playground
- https://github.com/fenixsecurelabs/core-nexus
- https://github.com/phoenixvlabs/core-nexus
- https://github.com/phxvlabsio/core-nexus