bugtraq - Re: iDEFENSE Security Advisory 12.21.04: libtiff STRIPOFFSETS Integer Overflow Vulnerability

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Date: Mon, 27 Dec 2004 11:37:02 +0100
From: Marcus Meissner <meissner@...e.de>
To: customer service mailbox <customerservice@...fense.com>
Cc: bugtraq@...urityfocus.com, vulnwatch@...nwatch.org
Subject: Re: iDEFENSE Security Advisory 12.21.04: libtiff STRIPOFFSETS Integer Overflow Vulnerability

On Tue, Dec 21, 2004 at 05:09:30PM -0500, customer service mailbox wrote:
> libtiff STRIPOFFSETS Integer Overflow Vulnerability
> 
> iDEFENSE Security Advisory 12.21.04
> www.idefense.com/application/poi/display?id=173&type=vulnerabilities
> December 21, 2004
....

> The overflow occurs in the parsing of TIFF files set with the 
> STRIPOFFSETS flag in libtiff/tif_dirread.c. In the TIFFFetchStripThing()
> 
> function, the number of strips (nstrips) is used directly in a 
> CheckMalloc() routine without sanity checking. The call ultimately boils
> 	
> 	- SuSE Linux 

This problem had already been fixed in SUSE Linux with the last libtiff
update:
	http://www.novell.com/linux/security/advisories/2004_38_libtiff.html

Ciao, Marcus

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