[security-alerts] FW: [SA20061] Microsoft Windows "itss.dll" Heap Corruption Vulnerability

["Kazennov, Vladimir" <Vladimir.Kazennov@xxxxxxxxxx>]

> 
> TITLE:
> Microsoft Windows "itss.dll" Heap Corruption Vulnerability
> 
> SECUNIA ADVISORY ID:
> SA20061
> 
> VERIFY ADVISORY:
> http://secunia.com/advisories/20061/
> 
> CRITICAL:
> Less critical
> 
> IMPACT:
> System access
> 
> WHERE:
> From remote
> 
> OPERATING SYSTEM:
> Microsoft Windows 2000 Advanced Server
> http://secunia.com/product/21/
> Microsoft Windows 2000 Datacenter Server
> http://secunia.com/product/1177/
> Microsoft Windows 2000 Professional
> http://secunia.com/product/1/
> Microsoft Windows 2000 Server
> http://secunia.com/product/20/
> Microsoft Windows XP Home Edition
> http://secunia.com/product/16/
> Microsoft Windows XP Professional
> http://secunia.com/product/22/
> 
> DESCRIPTION:
> Rubén Santamarta has discovered a vulnerability in Microsoft Windows,
> which potentially can be exploited by malicious people to compromise a
> user's system.
> 
> The vulnerability is caused due to a boundary error in the Infotech
> Storage System Library (itss.dll) when reading a ".CHM" file. This
> can be exploited to cause heap corruption and may allow arbitrary
> code execution via a specially crafted ".CHM" file.
> 
> Successful exploitation requires that the user is e.g. tricked in
> opening or decompiling a malicious ".CHM" file using "hh.exe".
> 
> The vulnerability has been confirmed in Windows XP SP2 (fully
> patched) and also reported in Windows 2000 SP4. Other versions may
> also be affected.
> 
> NOTE: The CHM file format should be considered insecure and treated
> similar to an executable file. However, this vulnerability is
> triggered even when the user decompiles the file without opening it.
> 
> SOLUTION:
> The vulnerability will reportedly be fixed in the next Service Pack.
> 
> Do not open or decompile untrusted ".CHM" files.
> 
> PROVIDED AND/OR DISCOVERED BY:
> Rubén Santamarta
> 
> ORIGINAL ADVISORY:
> http://reversemode.com/index.php?option=com_content&task=view&;
> id=11&Itemid=1
> 
>