ZDI-08-023: Microsoft Office RTF Parsing Engine Memory Corruption Vulnerability

[zdi-disclosures@xxxxxxxx]

ZDI-08-023: Microsoft Office RTF Parsing Engine Memory Corruption 
Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-08-023
August 14, 2007

-- CVE ID:
CVE-2008-1091

-- Affected Vendors:
Microsoft

-- Affected Products:
Microsoft Office Excel
Microsoft Office Word

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 6099. 
For further product information on the TippingPoint IPS, visit:

    http://www.tippingpoint.com

-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Microsoft Office.  User interaction is
required to exploit this vulnerability in that the target must visit a
malicious page, open a malicious email, or open a malicious file.

The specific flaw exists when parsing malformed RTF documents.  When
processing a combination of RTF tags a heap overflow occurs.  Successful
exploitation can lead to remote compromise of a system 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/ms08-026.mspx

-- Disclosure Timeline:
2008-01-21 - Vulnerability reported to vendor
2008-05-13 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * wushi of team509

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