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TITLE:
LibTIFF tiff2pdf Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA20488

VERIFY ADVISORY:
http://secunia.com/advisories/20488/

CRITICAL:
Moderately critical

IMPACT:
DoS, System access

WHERE:
>From remote

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

DESCRIPTION:
gpe92 has discovered a vulnerability in LibTIFF, which can be
exploited by malicious people to cause a DoS (Denial of Service) and
potentially compromise a user's system.

The vulnerability is caused due to a boundary error within tiff2pdf
when handling a TIFF file with a "DocumentName" tag that contains
UTF-8 characters. This can be exploited to cause a stack-based buffer
overflow and may allow arbitrary code execution.

The vulnerability has been confirmed in version 3.8.2. Other versions
may also be affected.

SOLUTION:
Restrict use to trusted TIFF files only.

PROVIDED AND/OR DISCOVERED BY:
gpe92

ORIGINAL ADVISORY:
http://bugzilla.remotesensing.org/show_bug.cgi?id=1196

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