CVE-2015-7724

AMD fglrx-driver before 15.9 allows local users to gain privileges via a symlink attack. NOTE: This vulnerability exists due to an incomplete fix for CVE-2015-7723.

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://packetstormsecurity.com/files/134120/AMD-fglrx-driver-15.7-Privilege-Escalation.html
• http://seclists.org/fulldisclosure/2015/Oct/103
• http://www.securityfocus.com/archive/1/536782/100/0/threaded
• http://www.securityfocus.com/bid/77361
• https://www.portcullis-security.com/security-research-and-downloads/security-advisories/cve-2015-7724/