MOBB Bug Among Mozilla Patches Fix avoids 'race conditions,' where a system tries to perform multiple operations simultaneously, bypassing normal processing
Among a round of security patches issued yesterday by Mozilla in a new version of its Firefox browser was a critical one first discovered by the head researcher of the Month of Browser Bugs (MOBB) project. (See Getting Buggy with the MOBB.)
But HD Moore, the researcher who heads up MOBB and found the Firefox bug, as of press time had not yet published the bug on his site. He had agreed to hold off until after Mozilla had released the updates to its browser. The MOBB project, although well-respected, has faced some criticism on publishing bugs before vendors have patched the problems.
"We strongly recommend that all users upgrade to this latest release," Chris Beard, vice president of products for Mozilla said in a statement.
Moore says his test script still needs some work, but he'll likely post it on the MOBB site soon. An attack using this vulnerability occurs in two stages: "First, you load multiple copies of the payload into memory and cause the target address to be allocated," he says. "Then you try to trigger the race condition that results in the program jumping to the payload."
Marc Maiffret, CTO for eEye Digital Security, which sells Blink, an endpoint intrusion-prevention system, says the Mozilla patches overall look like "more of the same" browser vulnerabilities out there today. But it's these non-Microsoft vulnerabilities that worry him most. "The scariest thing in security is the average company running predominantly Windows desktops or servers are so focused on Microsoft Patch Tuesday that they've forgotten most of the other software on their network," he says. "These are just as vulnerable if not more."
Kelly Jackson Higgins, Senior Editor, Dark Reading
eEye Digital Security
Kelly Jackson Higgins is the Executive Editor of Dark Reading. She is an award-winning veteran technology and business journalist with more than two decades of experience in reporting and editing for various publications, including Network Computing, Secure Enterprise ... View Full Bio