Zero-Day Advisory

Fortinet Discovers Remote Code Execution Vulnerability In Microsoft Internet Explorer


Fortinet's FortiGuard Labs has discovered remote code execution vulnerability In Microsoft Internet Explorer.


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

Released Jun 04, 2009

Use the solution provided by Microsoft.

Additional Information

The vulnerability occurs when Internet Explorer processes special DHTML functions. A crash may happen when destroying a window after making a sequence of calls on the "tr" element. These calls are linked to the insertion, deletion and attributes of a table cell. The crash may then allow the arbitrary execution of code on the browsers machine.


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.