bugtraq - ZDI-10-047: Mozilla Firefox libpr0n imgContainer Bits-Per-Pixel Change Remote Code Execution Vulnerability

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Date: Fri, 2 Apr 2010 12:56:41 -0500
From: ZDI Disclosures <zdi-disclosures@...pingpoint.com>
To: "'full-disclosure@...ts.grok.org.uk'" <full-disclosure@...ts.grok.org.uk>,
	"'bugtraq@...urityfocus.com'" <bugtraq@...urityfocus.com>
Subject: ZDI-10-047: Mozilla Firefox libpr0n imgContainer Bits-Per-Pixel
 Change Remote Code Execution Vulnerability

ZDI-10-047: Mozilla Firefox libpr0n imgContainer Bits-Per-Pixel Change Remote Code Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-10-047
April 2, 2010

-- CVE ID:
CVE-2010-0164

-- Affected Vendors:
Mozilla Firefox

-- Affected Products:
Mozilla Firefox 3.6.x

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 9620. 
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 libpr0n library which is responsible
for handling image caching and animation and is due to the way the
application handles animations received from the server via the
multipart/x-mixed-replace mimetype. During a case where the
bits-per-pixel changes, the application will free a pointer and then can
be made to reuse the freed pointer later. This can lead to code
execution under the context of the application.

-- 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/mfsa2010-09.html

-- Disclosure Timeline:
2010-02-18 - Vulnerability reported to vendor
2010-04-02 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * regenrecht

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