[Full-disclosure] FortiGuard Advisory: Apple Safari Remote Memory Corruption Vulnerability

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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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