Advisory Details

May 10th, 2011

Mozilla Firefox OBJECT mObserverList Remote Code Execution Vulnerability

ZDI-11-159
ZDI-CAN-1033

CVE ID CVE-2011-0066
CVSS SCORE 9, (AV:N/AC:L/Au:N/C:P/I:P/A:C)
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 11198. 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 Firefox's handling of observer OBJECTs. If an observer OBJECT is removed from the mObserverList during an iteration of LOOP_OVER_OBSERVERS macro, one can heap spray over |mObserverList.mNext| and
change the execution flow. This would allow the attacker to execute arbitrary code under the context of the user running the browser.

ADDITIONAL DETAILS Mozilla has issued an update to correct this vulnerability. More details can be found at:
http://www.mozilla.org/security/announce/2011/mfsa2011-13.html
DISCLOSURE TIMELINE
  • 2011-02-17 - Vulnerability reported to vendor
  • 2011-05-10 - Coordinated public release of advisory
CREDIT regenrecht
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