Firewall Builder temp file symlink

firewallbuilder-temp-symlink (53392)

Medium Risk

Description:

Firewall Builder could allow a local attacker to launch a symlink attack. Temporary files are created insecurely. A local attacker could exploit this vulnerability by creating a symbolic link from a temporary file to various files on the system, which could allow the attacker to overwrite arbitrary files on the system with elevated privileges.

*CVSS:

Base Score:	3.3
Access Vector:	Local
Access Complexity:	Medium
Authentication:	None
Confidentiality Impact:	None
Integrity Impact:	Partial
Availability Impact:	Partial
Temporal Score:	2.9
Exploitability:	High
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

File Manipulation

Remedy:

Upgrade to the latest version of Firewall Builder (3.0.7 or later), available from the NetCitadel Web site. See References.

References:

• Firewall Builder Blog: Firewall Builder v3.0.7 Released.
• NetCitadel Web site: Firewall Builder.
• BID-36468: NetCitadel Firewall Builder Script Generation Insecure Temporary File Creation Vulnerability
• 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.
• OSVDB ID: 58247: Firewall Builder iptables Script Temporary File Symlink Arbitrary File Overwrite
• SA36809: Firewall Builder Insecure Temporary Files
• VUPEN/ADV-2010-0389: Firewall Builder Iptables Script Insecure Temporary File Vulnerability

Platforms Affected:

• NetCitadel Firewall Builder 3.0.4
• NetCitadel Firewall Builder 3.0.5
• NetCitadel Firewall Builder 3.0.6

Reported:

Sep 18, 2009

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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