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TITLE:
LibTIFF LZW Decoder Buffer Underflow Vulnerability

SECUNIA ADVISORY ID:
SA31610

VERIFY ADVISORY:
http://secunia.com/advisories/31610/

CRITICAL:
Moderately critical

IMPACT:
DoS, System access

WHERE:
>From remote

SOFTWARE:
LibTIFF 3.x
http://secunia.com/product/4053/

DESCRIPTION:
A vulnerability has been reported in LibTIFF, which can be exploited
by malicious people to cause a DoS (Denial of Service) or to
potentially compromise a user's system.

The vulnerability is caused due to errors within the "LZWDecode()"
and "LZWDecodeCompat()" functions in libtiff/tif_lzw.c. These can be
exploited to cause a buffer underflow via a specially crafted TIFF
file.

The vulnerability is reported in version 3.8.2. Other versions may
also be affected.

SOLUTION:
Do not process untrusted TIFF files using LibTIFF.

PROVIDED AND/OR DISCOVERED BY:
Debian credits Drew Yao of Apple Product Security.

ORIGINAL ADVISORY:
http://security-tracker.debian.net/tracker/CVE-2008-2327

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About:
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http://secunia.com/about_secunia_advisories/


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