Microsoft Internet Explorer MSADO CacheSize Remote Code Execution Vulnerability

August 22nd, 2012
ZDI-12-158 ZDI-CAN-1521

CVE ID

CVE-2012-1891

CVSS Score

7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected Vendors

Microsoft

Affected Products

Internet Explorer 9

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/

Additional Details

Microsoft has issued an update to correct this vulnerability. More details can be found at:
http://technet.microsoft.com/en-us/security/bulletin/ms12-045

Disclosure Timeline

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

Credit

Anonymous

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