CVE-2011-0007

pimd 2.1.5 and possibly earlier versions allows user-assisted local users to overwrite arbitrary files via a symlink attack on (1) pimd.dump when a USR1 signal is sent, or (2) pimd.cache when USR2 is sent.

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/42759
• http://secunia.com/advisories/42793
• http://www.debian.org/security/2011/dsa-2147
• http://www.openwall.com/lists/oss-security/2011/01/07/3
• http://www.openwall.com/lists/oss-security/2011/01/07/4
• http://www.osvdb.org/70305
• http://www.securityfocus.com/bid/45715
• http://www.vupen.com/english/advisories/2011/0113
• https://exchange.xforce.ibmcloud.com/vulnerabilities/64528