CVE-2009-0032

CUPS on Mandriva Linux 2008.0, 2008.1, 2009.0, Corporate Server (CS) 3.0 and 4.0, and Multi Network Firewall (MNF) 2.0 allows local users to overwrite arbitrary files via a symlink attack on the /tmp/pdf.log temporary file.

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://securitytracker.com/id?1021637
• http://www.mandriva.com/security/advisories?name=MDVSA-2009:027
• http://www.mandriva.com/security/advisories?name=MDVSA-2009:028
• http://www.mandriva.com/security/advisories?name=MDVSA-2009:029
• http://www.securityfocus.com/bid/33418
• https://exchange.xforce.ibmcloud.com/vulnerabilities/48210