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ZDI-12-110 : Mozilla Firefox AttributeChildRemoved Use-After-Free Remote
Code Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-12-110
June 28, 2012

- -- CVE ID:
CVE-2011-3659

- -- CVSS:
7.5, AV:N/AC:L/Au:N/C:P/I:P/A:P

- -- 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 12418.
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 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. 

- -- Vendor Response:
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:
This vulnerability was discovered by:
* regenrecht


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