Advisory Details

April 5th, 2010

Mozilla Firefox Cross Document DOM Node Moving Remote Code Execution Vulnerability

ZDI-10-063
ZDI-CAN-761

CVE ID CVE-2010-1121
CVSS SCORE 10.0, (AV:N/AC:L/Au:N/C:C/I:C/A:C)
AFFECTED VENDORS Mozilla Firefox
AFFECTED PRODUCTS 3.6.x
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 9666. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS

This vulnerability allows remote attackers to bypass specific script execution enforcements 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 when moving DOM nodes in between documents with a specific timing while triggering garbage collection. If timed correctly Firefox will incorrectly reference a previously freed object which can be leveraged by an attacker to execute arbitrary code under the context of the current user.

VENDOR RESPONSE Mozilla Firefox has issued an update to correct this vulnerability. More details can be found at:
http://www.mozilla.org/security/announce/2010/mfsa2010-25.html
DISCLOSURE TIMELINE
  • 2010-03-26 - Vulnerability reported to vendor
  • 2010-04-05 - Coordinated public release of advisory
CREDIT Nils of MWR InfoSecurity (http://twitter.com/MWRlabs)
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