Advisory Details

March 5th, 2009

Mozilla Firefox XUL Linked Clones Double Free Vulnerability

ZDI-09-013
ZDI-CAN-423

CVE ID CVE-2009-0775
CVSS SCORE
AFFECTED VENDORS Mozilla Firefox
AFFECTED PRODUCTS 3.0.x
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 6870. 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.

The specific flaw exists during the browsers garbage collection process. When multiple DOM elements are cloned and linked to one another and the browser is reloaded, a memory corruption occurs resulting in a double free. This can be leveraged to execute arbitrary code under the context of the current user.

ADDITIONAL DETAILS Mozilla Firefox has issued an update to correct this vulnerability. More details can be found at:
http://www.mozilla.org/security/announce/2009/mfsa2009-08.html
DISCLOSURE TIMELINE
  • 2009-01-19 - Vulnerability reported to vendor
  • 2009-03-05 - Coordinated public release of advisory
CREDIT Anonymous
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