CVE-2009-3304

GForge 4.5.14, 4.7 rc2, and 4.8.2 allows local users to overwrite arbitrary files via a symlink attack on authorized_keys files in users home directories, related to deb-specific/ssh_dump_update.pl and cronjobs/cvs-cron/ssh_create.php.

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://security.debian.org/pool/updates/main/g/gforge/gforge_4.5.14-22etch13.diff.gz
• http://www.debian.org/security/2009/dsa-1945
• http://www.securityfocus.com/bid/37195