Mozilla Patches Three Critical Holes in Firefox

According to technical details released by the company, one problem pertains to malformed GIF image files that could crash Firefox on Mac OS X and might allow intruders to launch arbitrary code. The problem doesn't affect Firefox 2.x.

A second vulnerability involves combining two flaws to facilitate a direct attack that could lead to direct file access on a user's computer when such an attack is launched against Firefox 2.x. In Firefox 3.0 such an attack isn't possible; however, the vulnerability could still allow an intruder to launch arbitrary code.

The third vulnerability involves a reference pointer to Cascading Style Sheet (CSS) objects. Mozilla said that in their code the pointer is defined using a variable size that is too small, which leaves room for an overflow attack, which typically might allow the execution of arbitrary code.

More details are available at Mozilla's website.

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