A vulnerability has been reported in Firefox, which can be exploited by malicious people to cause a DoS (Denial of Service) and potentially compromise a user's system.

A vulnerability has been reported in Firefox, which can be exploited by malicious people to cause a DoS (Denial of Service) and potentially compromise a user's system.

The vulnerability is caused due to a reference to a deleted object when designMode is enabled. This can be exploited to corrupt the memory and cause a crash by calling the "contentWindow.focus()" method on a container with specially crafted content.

Successful exploitation may allow execution of arbitrary code.

The vulnerability has been reported in versions 1.5 through 1.5.0.2.

Update to version 1.5.0.3.
http://www.mozilla.com/firefox/