[NT] Microsoft Excel Rich Text Memory Corruption Vulnerability (MS08-014)



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Microsoft Excel Rich Text Memory Corruption Vulnerability (MS08-014)
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SUMMARY

A vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Microsoft Office Excel. Exploitation requires
that the attacker coerce the target into opening a malicious .XLS file.

DETAILS

Vulnerable Systems:
* Microsoft Office Excel 2003
* Microsoft Office Excel 2002
* Microsoft Office Excel 2000

The specific flaw exists within the parsing of the BIFF file format used
by Microsoft Excel. During the processing of a malformed tag a heap
allocation can be adversely controlled. When user supplied data is copied
to a heap buffer the resulting data results in a arbitrary memory
overwrite. If successfully exploited this could lead to system compromise
under the credentials of the currently logged in user.

Vendor Response:
Microsoft has issued an update to correct this vulnerability. More details
can be found at:
<http://www.microsoft.com/technet/security/Bulletin/MS08-014.mspx>
http://www.microsoft.com/technet/security/Bulletin/MS08-014.mspx

Disclosure Timeline:
2007-10-17 - Vulnerability reported to vendor
2008-03-11 - Coordinated public release of advisory

CVE Information:
<http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0116>
CVE-2008-0116


ADDITIONAL INFORMATION

The information has been provided by <mailto:dvlabs@xxxxxxxxxxxxxxxx>
TippingPoint DVLabs.
The original article can be found at:
<http://dvlabs.tippingpoint.com/advisory/TPTI-08-03>
http://dvlabs.tippingpoint.com/advisory/TPTI-08-03



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