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POPS Attack code posted for unpatched Firefox 3.5 flaw July 14th, 2009 Mozilla’s security response team is scrambling to respond to the release of exploit code A zero day exploit (Firefox 3.5 Heap Spray Vulnerability) affecting Mozilla’s latest Firefox release has been published in the wild. Through an error in the processing of JavaScript code in ‘font tags’ malicious attackers could achieve arbitrary code execution and install malware on the affected hosts. There’s no indication of its use on a global scale just yet, however due to the fact that the PoC is now public, it shouldn’t take long before cybercriminals embed it within the diverse exploits set of their web malware exploitation kits, allowing it to scale.