CVE-2011-0402

dpkg-source in dpkg before 1.14.31 and 1.15.x allows user-assisted remote attackers to modify arbitrary files via a symlink attack on unspecified files in the .pc directory.

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://lists.fedoraproject.org/pipermail/package-announce/2011-January/053306.html
• http://lists.fedoraproject.org/pipermail/package-announce/2011-January/053311.html
• http://osvdb.org/70367
• http://secunia.com/advisories/42826
• http://secunia.com/advisories/42831
• http://secunia.com/advisories/43054
• http://www.debian.org/security/2011/dsa-2142
• http://www.securityfocus.com/bid/45703
• http://www.ubuntu.com/usn/USN-1038-1
• http://www.vupen.com/english/advisories/2011/0040
• http://www.vupen.com/english/advisories/2011/0044
• http://www.vupen.com/english/advisories/2011/0196
• https://exchange.xforce.ibmcloud.com/vulnerabilities/64614