Advisory Details

January 11th, 2011

Microsoft Internet Explorer MSADO CacheSize Remote Code Execution Vulnerability

ZDI-11-002
ZDI-CAN-856

CVE ID CVE-2011-0027
CVSS SCORE 9, (AV:N/AC:L/Au:N/C:P/I:P/A:C)
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Internet Explorer 8
TIPPINGPOINT™ IPS CUSTOMER PROTECTION TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 10761. 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 Internet Explorer. This vulnerability was submitted to the ZDI via at the annual Pwn2Own competition at CanSecWest. 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 MSADO component. When handling the a user specified CacheSize property the process uses this value to calculate the 'real' cache size. This value is used without proper validation. A remote attacker can exploit this vulnerability to execute arbitrary code under the context of the browser.

VENDOR RESPONSE Microsoft has issued an update to correct this vulnerability. More details can be found at:
http://www.microsoft.com/technet/security/bulletin/MS11-002.mspx
DISCLOSURE TIMELINE
  • 2010-03-26 - Vulnerability reported to vendor
  • 2011-01-11 - Coordinated public release of advisory
CREDIT Peter Vreugdenhil
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