FortiGuard Advisory: Apple Safari Remote Memory Corruption Vulnerability

["noreply-secresearch () fortinet com" <noreply-secresearch () fortinet com>]

Apple Safari Remote Memory Corruption Vulnerability
2009.June.09

Fortinet's FortiGuard Global Security Research Team Discovers Vulnerability in Apple Safari.

Summary:
========
A memory corruption vulnerability exists in Apple Safari which allows a remote attacker to execute arbitrary code 
through a malicious webpage.

Impact:
=======
Remote Code Execution.

Risk:
=====
Critical

Affected Software:
==================
For a list of product versions affected, please see the Apple Security Update reference below.

Additional Information:
=======================
The memory corruption vulnerability occurs when handling HTML table elements. A remote attacker may craft a malicious 
webpage and lure an unsuspecting user. When the page is viewed and these elements are processed, arbitrary code 
execution may occur resulting in the victims machine being compromised.

Solutions:
==========
Apple security updates are available via their Software Update mechanism.
Apple security updates are available for manual download here.
The FortiGuard Global Security Research Team released a signature "DHTML.Malicious.Table.Elements", which covers this 
specific vulnerability.

Fortinet customers who subscribe to Fortinet's intrusion prevention (IPS) service should be protected against this 
memory corruption vulnerability. Fortinet's IPS service is one component of FortiGuard Subscription Services, which 
also offer comprehensive solutions such as antivirus, Web content filtering and antispam capabilities. These services 
enable protection against threats on both application and network layers. FortiGuard Services are continuously updated 
by the FortiGuard Global Security Research Team, which enables Fortinet to deliver a combination of multi-layered 
security intelligence and true zero-day protection from new and emerging threats. These updates are delivered to all 
FortiGate, FortiMail and FortiClient products. Fortinet strictly follows responsible disclosure guidelines to ensure 
optimum protection during a threat's lifecycle. 

References:
===========
FortiGuard Advisory: http://www.fortiguardcenter.com/advisory/FGA-2009-23.html
Apple Security Updates for Safari 4.0: http://support.apple.com/kb/HT3613
Apple Security Updates for iPhone: http://support.apple.com/kb/HT3318
CVE ID: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4231

Acknowledgement:
================
Haifei Li of Fortinet's FortiGuard Global Security Research Team


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