From: Secunia Security Advisories (sec-advsecunia.com)
Date: Thu Sep 27 2007 - 10:17:12 CDT

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TITLE:
Tk GIF Processing Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA26942

VERIFY ADVISORY:
http://secunia.com/advisories/26942/

CRITICAL:
Moderately critical

IMPACT:
DoS, System access

WHERE:
From remote

SOFTWARE:
Tcl/Tk 8.x
http://secunia.com/product/5666/

DESCRIPTION:
A vulnerability has been reported in Tk, which can potentially be
exploited by malicious people to compromise an application using the
library.

The vulnerability is caused due to a boundary error within the
"ReadImage()" function in generic/tkImgGIF.c. This can be exploited
to cause a buffer overflow via interlaced GIF files containing
multiple smaller frames following the first frame.

Successful exploitation may allow execution of arbitrary code.

The vulnerability is reported in versions prior to 8.4.16.

SOLUTION:
Update to version 8.4.16.
http://www.tcl.tk/software/tcltk/downloadnow84.tml

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
http://sourceforge.net/project/shownotes.php?release_id=541207

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