Mozilla Firefox 3.5.1 Fixes Critical Security Issue

Mozilla has released Firefox 3.5.1, an update to their popular browser which fixes a critical security issue.

Firefox user zbyte reported a crash that we determined could result in an exploitable memory corruption problem. In certain cases after a return from a native function, such as escape(), the Just-in-Time (JIT) compiler could get into a corrupt state. This could be exploited by an attacker to run arbitrary code such as installing malware.

The update also fixes an issue that was making Firefox take a long time to load on some Windows systems.


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