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Fortinet Protects Against Vulnerability in Internet Explorer Could Allow Remote Code Execution

Last Modified: Oct 24, 2011 17:42:22

Summary

Fortinet's FortiGuard Labs protects against a remote code execution vulnerability in Internet Explorer.

Impact

Remote Code Execution

Risk

Critical

Affected Software

For a list of Internet Explorer versions affected, please see the Microsoft Security Advisory reference below.

Solutions

  • FortiGuard Labs released the following signature which covers this specific vulnerability
    • MS.IE.Event.Invalid.Pointer.Memory.Corruption on Jan 21, 2010
  • Since an attack scenario would require a user to visit a malicious website, it is recommended to have a layered security solution through webfiltering and intrusion prevention for mitigation.

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.

Additional Information

The vulnerability exists as an invalid pointer reference within Internet Explorer. It is possible under certain conditions for the invalid pointer to be accessed after an object is deleted. In a specially-crafted attack, in attempting to access a freed object, Internet Explorer can be caused to allow remote code execution. In order to compromise a system / remotely execute code, an attacker would lure a user to a maliciously crafted website.

References