TippingPoint Zero Day Initiative

TrendMicro Control Manager CASProcessor.exe BLOB Remote Code Execution Vulnerability

ZDI-11-235: July 12th, 2011

CVSS Score

Affected Vendors

Affected Products

    Control Manager

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 11468. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Trend Micro Control Manager. Authentication is not required to exploit this vulnerability.

The specific flaw exists within En_Utility.dll. A module called from CASProcessor.exe running on TCP port 20801. A specially crafted packet with malformed BLOB encrypted data, is handled by HandleMcpRequest(), and contains instructions that will allow for an integer wrap, leading to a heap overflow. An attacker can leverage this vulnerability to execute arbitrary code under the context of the SYSTEM.

Vendor Response

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

Disclosure Timeline

    2011-04-07 - Vulnerability reported to vendor
    2011-07-12 - Coordinated public release of advisory


This vulnerability was discovered by:
    Luigi Auriemma