TippingPoint Zero Day Initiative

Microsoft Internet Explorer MSADO CacheSize Remote Code Execution Vulnerability

ZDI-12-158: August 22nd, 2012


CVSS Score

Affected Vendors

Affected Products

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:

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Internet Explorer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific 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. This bug is a failed fix for CVE-2011-0027 / http://www.zerodayinitiative.com/advisories/ZDI-11-002/

Vendor Response

Microsoft has issued an update to correct this vulnerability. More details can be found at:

Disclosure Timeline

    2012-02-13 - Vulnerability reported to vendor
    2012-08-22 - Coordinated public release of advisory


This vulnerability was discovered by: