Zero-Day Advisory

Fortinet Discovers Apple Safari DHTML Handling Remote Code Execution Vulnerability

Summary

Fortinet's FortiGuard Labs has discovered DHTML handling remote code execution vulnerability in Apple Safari.

Solutions

FortiGuard Labs released the following FortiGate IPS signature which covers this specific vulnerability:

DHTML.Malicious.Table.Elements.Remote.Code.Execution
Released Oct 29, 2008
Apple security updates are available via their Software Update mechanism.

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.

References

• http://support.apple.com/kb/HT3318

• http://support.apple.com/kb/HT3613

• CVE-2008-4231

Acknowledgement

Haifei Li of Fortinet's FortiGuard Global Security Research Team

IPS Subscription

Fortinet customers who subscribe to Fortinet's intrusion prevention (IPS) service should be protected against this vulnerability with the appropriate configuration parameters in place. 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 FortiGuard Labs, 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.