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TITLE:
libTIFF BitsPerSample Tag Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA15320

VERIFY ADVISORY:
http://secunia.com/advisories/15320/

CRITICAL:
Moderately critical

IMPACT:
System access

WHERE:
>From remote

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

DESCRIPTION:
Tavis Ormandy has reported a vulnerability in libTIFF, which
potentially can be exploited by malicious people to compromise a
vulnerable system.

The vulnerability is caused due to a boundary error and can be
exploited to cause a buffer overflow via a specially crafted TIFF
image containing a malformed BitsPerSample tag.

Successful exploitation may allow execution of arbitrary code, if a
malicious TIFF image is opened in an application linked against the
vulnerable library.

SOLUTION:
A fix is reportedly available in the CVS repository.

PROVIDED AND/OR DISCOVERED BY:
Tavis Ormandy, Gentoo Linux Security Audit Team.

ORIGINAL ADVISORY:
libtiff:
http://bugzilla.remotesensing.org/show_bug.cgi?id=843

Gentoo:
http://security.gentoo.org/glsa/glsa-200505-07.xml

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