CVE-2022-38730

Docker Desktop for Windows before 4.6 allows attackers to overwrite any file through the windowscontainers/start dockerBackendV2 API by controlling the data-root field inside the DaemonJSON field in the WindowsContainerStartRequest class. This allows exploiting a symlink vulnerability in ..dataRootnetworkfileslocal-kv.db because of a TOCTOU race condition.

Weakness

The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

Affected Software

Potential Mitigations

• Follow the principle of least privilege when assigning access rights to entities in a software system.
• Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/132.html
• https://cwe.mitre.org/data/definitions/17.html
• https://cwe.mitre.org/data/definitions/35.html
• https://cwe.mitre.org/data/definitions/76.html

References

• https://docs.docker.com/desktop/release-notes/#docker-desktop-460
• https://www.cyberark.com/resources/threat-research-blog/breaking-docker-named-pipes-systematically-docker-desktop-privilege-escalation-part-2
• https://docs.docker.com/desktop/release-notes/#docker-desktop-460
• https://www.cyberark.com/resources/threat-research-blog/breaking-docker-named-pipes-systematically-docker-desktop-privilege-escalation-part-2