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Mozilla Foundation Security Advisory 2013-48

Title: Memory corruption found using Address Sanitizer
Impact: Critical
Announced: May 14, 2013
Reporter: Abhishek Arya
Products: Firefox, Thunderbird

Fixed in: Firefox 21.0
  Firefox ESR 17.0.6
  Thunderbird 17.0.6
  Thunderbird ESR 17.0.6


Security researcher Abhishek Arya (Inferno) of the Google Chrome Security Team used the Address Sanitizer tool to discover a series of use-after-free, out of bounds read, and invalid write problems rated as moderate to critical as security issues in shipped software. Some of these issues are potentially exploitable, allowing for remote code execution. We would also like to thank Abhishek for reporting additional use-after-free flaws in dir=auto code introduced during Firefox development. These were fixed before general release.