Advisory Details

April 12th, 2011

Microsoft Office Excel RealTimeData Record Parsing Remote Code Execution Vulnerability

ZDI-11-120
ZDI-CAN-1007

CVE ID CVE-2011-0101
CVSS SCORE 9, (AV:N/AC:L/Au:N/C:P/I:P/A:C)
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Office Excel 2002
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 10872. 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 Microsoft Office Excel. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The flaw exists within the methods used for RealTimeData Record Parsing. When handling a stTopic field has a bit set specifying double byte characters in the following field the value of a global pointer is improperly calculated. This pointer is later used in a memcpy operation whose source is user supplied data. A remote attacker can exploit this vulnerability to execute arbitrary code under the context of the 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/ms11-021.mspx
DISCLOSURE TIMELINE
  • 2010-11-15 - Vulnerability reported to vendor
  • 2011-04-12 - Coordinated public release of advisory
CREDIT Aniway (Aniway.Anyway AT gmail DOT com)
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