Firefox 21 Update Patches 8 Vulnerabilities, 3 Critical

Mozilla fixed eight vulnerabilities, three critical, in the 21st build of its flagship Firefox browser yesterday. One of the fixes remedies an Address Sanitizer memory corruption flaw MFSA 2013-48 that could’ve allowed remote code execution. The other two critical flaws could’ve also led to...

Use-after-free with video and onresize event — Mozilla

Security researcher Nils reported a use-after-free when resizing video while playing. This could allow for arbitrary code execution...