CVE-2015-5752

Backup in Apple iOS before 8.4.1 allows attackers to bypass intended restrictions on filesystem access via a crafted app that creates 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

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

• http://lists.apple.com/archives/security-announce/2015/Aug/msg00002.html
• http://www.securityfocus.com/bid/76337
• http://www.securitytracker.com/id/1033275
• https://support.apple.com/kb/HT205030