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TITLE:
LibTIFF Denial of Service Vulnerabilities

SECUNIA ADVISORY ID:
SA40422

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/40422/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=40422

RELEASE DATE:
2010-07-02

DISCUSS ADVISORY:
http://secunia.com/advisories/40422/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
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 * Popularity
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 * Criticality Level
 * Impact
 * Where
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 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/40422/

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https://ca.secunia.com/?page=viewadvisory&vuln_id=40422

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 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
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DESCRIPTION:
Some vulnerabilities have been reported in LibTIFF, which can be
exploited by malicious people to cause a DoS (Denial of Service).

1) An error within the "putcontig8bitYCbCr12tile()" function in
libtiff/tif_getimage.c can be exploited to cause a crash when trying
to flip an image vertically on 64-bit platforms.

2) An error within the "TIFFYCbCrtoRGB()" function in
libtiff/tif_color.c when processing invalid ReferenceBlackWhite
values can be exploited to cause a crash.

3) An assertion error within the "OJPEGPostDecode()" function in
libtiff/tif_ojpeg.c can be exploited to terminate an application
using the library.

4) The "TIFFNewScanlineSize()", "TIFFScanlineSize()", and
"TIFFVStripSize()" functions in libtiff/tif_strip.c call the
"TIFFGetField()" without properly checking the return value, which
can potentially be exploited to e.g. cause a crash.

5) The library does not properly handle images with "SamplesPerPixel"
set to "1" and "Photometric" set to "YCbCr", which can be exploited to
cause a crash.

6) Errors when handling TIFF images with undefined strip byte counts
can be exploited to cause a crash.

SOLUTION:
Do not process untrusted TIFF images.

PROVIDED AND/OR DISCOVERED BY:
1-4, 6) Reported in e.g. Red Hat bug #583081 or #603024
5) Sauli Pahlman

ORIGINAL ADVISORY:
1) http://bugzilla.maptools.org/show_bug.cgi?id=2207
https://bugzilla.redhat.com/show_bug.cgi?id=583081
2) http://bugzilla.maptools.org/show_bug.cgi?id=2208
https://bugzilla.redhat.com/show_bug.cgi?id=583081
3) http://bugzilla.maptools.org/show_bug.cgi?id=2209
https://bugzilla.redhat.com/show_bug.cgi?id=583081
4) http://bugzilla.maptools.org/show_bug.cgi?id=2215
https://bugzilla.redhat.com/show_bug.cgi?id=583081
5) http://bugzilla.maptools.org/show_bug.cgi?id=2216
6) http://bugzilla.maptools.org/show_bug.cgi?id=1996#c12 
https://bugzilla.redhat.com/show_bug.cgi?id=603024#c9

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

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About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.

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