ZDI-09-013: Mozilla Firefox XUL Linked Clones Double Free Vulnerability



ZDI-09-013: Mozilla Firefox XUL Linked Clones Double Free Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-09-013
March 5, 2009

-- CVE ID:
CVE-2009-0775

-- Affected Vendors:
Mozilla Firefox

-- Affected Products:
Mozilla Firefox 3.0.x

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TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 6870.
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-- 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.

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

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