CVE-2009-4664

Firewall Builder 3.0.4, 3.0.5, and 3.0.6, when running on Linux, allows local users to gain privileges via a symlink attack on an unspecified temporary file that is created by the iptables script.

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://blog.fwbuilder.org/2009/09/firewall-builder-v307-released.html
• http://lists.fedoraproject.org/pipermail/package-announce/2010-February/035112.html
• http://osvdb.org/58247
• http://secunia.com/advisories/36809
• http://www.fwbuilder.org/docs/firewall_builder_release_notes.html#3.0.7
• http://www.securityfocus.com/bid/36468
• http://www.vupen.com/english/advisories/2010/0389
• https://bugzilla.redhat.com/show_bug.cgi?id=524588
• https://exchange.xforce.ibmcloud.com/vulnerabilities/53392