Advisory Details

December 9th, 2008

Microsoft Office RTF Drawing Object Heap Overflow Vulnerability

ZDI-08-085
ZDI-CAN-351

CVE ID CVE-2008-4028
CVSS SCORE
AFFECTED VENDORS Microsoft
Microsoft
AFFECTED PRODUCTS Outlook
Office Word
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 6611. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of various Microsoft products including Word and Outlook. User interaction is required to exploit this vulnerability in that the target must visit a malicious page, open a malicious e-mail, or open a malicious file.

The specific flaw exists within the parsing of RTF documents containing multiple drawing object tags. First, code within wwlib.dll allocates a buffer for the tag object. Later, a result from a call into mso.dll is copied into the same buffer but with a larger size than was allocated by the callee. Successful exploitation can lead to remote compromise of a system under the credentials of the currently logged in user.

ADDITIONAL DETAILS Microsoft has issued an update to correct this vulnerability. More details can be found at:
http://www.microsoft.com/technet/security/bulletin/MS08-072.mspx
DISCLOSURE TIMELINE
  • 2008-06-25 - Vulnerability reported to vendor
  • 2008-12-09 - Coordinated public release of advisory
CREDIT wushi of team509
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