CVE-2022-48579

UnRAR before 6.2.3 allows extraction of files outside of the destination folder via symlink chains.

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://github.com/pmachapman/unrar/commit/2ecab6bb5ac4f3b88f270218445496662020205f#diff-ca3086f578522062d7e390ed2cd7e10f646378a8b8cbf287a6e4db5966df68ee
• https://lists.debian.org/debian-lts-announce/2023/08/msg00023.html