Advisory Details

June 28th, 2012

Mozilla Firefox AttributeChildRemoved Use-After-Free Remote Code Execution Vulnerability

ZDI-12-110
ZDI-CAN-1413

CVE ID CVE-2011-3659
CVSS SCORE 7.5, (AV:N/AC:L/Au:N/C:P/I:P/A:P)
AFFECTED VENDORS Mozilla
AFFECTED PRODUCTS Firefox
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 12418. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Mozilla Firefox. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the way Firefox handles nsDOMAttribute child removal. It is possible to remove a child without setting the removed child pointer to NULL, thus leaving it still accessible as a dangling pointer. Subsequent use of this pointer allows for remote code execution.

ADDITIONAL DETAILS Mozilla has issued an update to correct this vulnerability. More details can be found at:
http://www.mozilla.org/security/announce/2012/mfsa2012-04.html
DISCLOSURE TIMELINE
  • 2011-12-01 - Vulnerability reported to vendor
  • 2012-06-28 - Coordinated public release of advisory
CREDIT regenrecht
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