CrashHouseKeeping in Crash Reporting in Apple iOS before 7.1 and Apple TV before 6.1 allows local users to change arbitrary file permissions by leveraging a symlink.
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
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Tvos | Apple | * | 6.0.2 (including) |
| Tvos | Apple | 6.0 (including) | 6.0 (including) |
| Tvos | Apple | 6.0.1 (including) | 6.0.1 (including) |
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