ZDI-11-157: Mozilla Firefox nsTreeRange Dangling Pointer Remote Code Execution Vulnerability

2011-05-1000:00:00

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http://www.zerodayinitiative.com/advisories/ZDI-11-157

May 9, 2011

– CVSS:
9, (AV:N/AC:L/Au:N/C:P/I:P/A:C)

– Affected Vendors:
Mozilla

– Affected Products:
Mozilla Firefox

– TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 11194.
For further product information on the TippingPoint IPS, visit:

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 user defined
functions of a nsTreeSelection element. When executing the function
invalidateSelection it is possible to free the nsTreeSelection object
that the function operates on. Any further operations on the freed
object can result in remote code execution.

– Vendor Response:
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:
2011-02-02 - Vulnerability reported to vendor
2011-05-09 - Coordinated public release of advisory

– Credit:
This vulnerability was discovered by:
* regenrecht

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