Technical Description

Multiple vulnerabilities have been identified in LibTIFF, which could be exploited by attackers to execute arbitrary commands or cause a denial of service.

The first issue is due to buffer overflow errors in the "TIFFFetchAnyArray()" [tif_dirread.c] function and in certain cleanup methods and functions, which could be exploited by attackers to crash a vulnerable application via a malformed TIFF image.

The second flaw is due to an integer overflow error in the "TIFFFetchData()" [tif_dirread.c] function, which could be exploited by attackers to execute arbitrary commands via a specially crafted TIFF image.

The third vulnerability is due to a double-free error in "tif_jpeg.c" within certain setfield/getfield methods in cleanup functions, which could be exploited by attackers to crash a vulnerable application or execute arbitrary commands.

The fourth flaw is due to an error in the "TIFFToRGB()" [tif_color.c] function that does not properly handle a TIFF image with Yr/Yg/Yb values that exceed the YCR/YCG/YCB values, which could be exploited by attackers to crash a vulnerable application via a malformed image.

Affected Products

LibTIFF version 3.8.0 and prior

Solution

Upgrade to LibTIFF version 3.8.1 :
http://www.remotesensing.org/libtiff/

References

http://www.vupen.com/english/advisories/2006/1563
http://www.remotesensing.org/libtiff/v3.8.1.html
http://bugzilla.remotesensing.org/show_bug.cgi?id=1102
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=189933

Credits

Vulnerabilities reported by Tavis Ormandy

ChangeLog

2006-04-28 : Initial release
2006-05-03 : Additional Vulnerability

Vulnerability Management

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