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TITLE:
Mozilla Thunderbird GIF Image Processing Buffer Overflow
Vulnerability

SECUNIA ADVISORY ID:
SA14685

VERIFY ADVISORY:
http://secunia.com/advisories/14685/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
Mozilla Thunderbird 1.x
http://secunia.com/product/4652/
Mozilla Thunderbird 0.x
http://secunia.com/product/2637/

DESCRIPTION:
Mark Dowd has reported a vulnerability in Thunderbird, which can be
exploited by malicious people to compromise a user's system.

The vulnerability is caused due to a boundary error in the GIF image
processing of Netscape extension 2 blocks and can be exploited to
cause a heap-based buffer overflow via a specially crafted image.

Successful exploitation may allow execution of arbitrary code.

The vulnerability has been reported in versions prior to 1.0.2.

SOLUTION:
Update to version 1.0.2.
http://www.mozilla.org/products/thunderbird/

PROVIDED AND/OR DISCOVERED BY:
Mark Dowd, ISS X-Force

ORIGINAL ADVISORY:
Mozilla:
http://www.mozilla.org/security/announce/mfsa2005-30.html

ISS:
http://xforce.iss.net/xforce/alerts/id/191

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