ZDI-11-002: Microsoft Internet Explorer MSADO CacheSize Remote Code Execution Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-11-002

January 11, 2011

-- CVE ID:
CVE-2011-0027

-- CVSS:
9, (AV:N/AC:L/Au:N/C:P/I:P/A:C)

-- Affected Vendors:
Microsoft

-- Affected Products:
Microsoft Internet Explorer 8

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 10761.
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 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:
2010-12-07 - Vulnerability reported to vendor
2011-01-11 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * Peter Vreugdenhil

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