Microsoft Office RTF Drawing Object Heap Overflow VulnerabilityZDI-08-085: December 9th, 2008
TippingPoint™ IPS Customer ProtectionTippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 6611. For further product information on the TippingPoint IPS:
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.
Vendor ResponseMicrosoft has issued an update to correct this vulnerability. More details can be found at:
2008-06-25 - Vulnerability reported to vendor
2008-12-09 - Coordinated public release of advisory
CreditThis vulnerability was discovered by:
wushi of team509