CVE-2004-1901

Portage before 2.0.50-r3 allows local users to overwrite arbitrary files via a hard link attack on the lockfiles.

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://secunia.com/advisories/11305
• http://security.gentoo.org/glsa/glsa-200404-01.xml
• http://www.securityfocus.com/bid/10060
• https://exchange.xforce.ibmcloud.com/vulnerabilities/15754