Executive Summary

Title Microsoft HeartbeatCtl ActiveX control buffer overflow
Name VU#570089 First vendor Publication 2008-04-21
Vendor VU-CERT Last vendor Modification 2008-04-21
Severity (Vendor) N/A Revision M

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:C/I:C/A:C)
Cvss Base Score 9.3 Attack Range Network
Cvss Impact Score 10 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores


Vulnerability Note VU#570089

Microsoft HeartbeatCtl ActiveX control buffer overflow


The Microsoft HeartbeatCtl ActiveX control contains a buffer overflow, which may allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.

I. Description

The Microsoft HeartbeatCtl ActiveX control is used to play multiplayer games on the MSN Games website. The HeartbeatCtl ActiveX control contains a buffer overflow in the handling of the "Host" parameter.

II. Impact

By convincing a user to view a specially crafted HTML document (e.g., a web page or an HTML email message or attachment), an attacker may be able to execute arbitrary code with the privileges of the user.

III. Solution

Apply an update

This issue is addressed in Microsoft Security Bulletin MS07-069. This update sets the kill bit for several unsupported versions of the HeartbeatCtl ActiveX control.

Disable the HeartbeatCtl ActiveX control in Internet Explorer

The vulnerable ActiveX control can be disabled in Internet Explorer by setting the kill bit for the following CLSID:

More information about how to set the kill bit is available in Microsoft Support Document 240797. Alternatively, the following text can be saved as a .REG file and imported to set the kill bit for this control:
    Windows Registry Editor Version 5.00

    [HKEY_LOCAL_MACHINESOFTWAREMicrosoftInternet ExplorerActiveX Compatibility{E5D419D6-A846-4514-9FAD-97E826C84822}]
    "Compatibility Flags"=dword:00000400
Disable ActiveX

Disabling ActiveX controls in the Internet Zone (or any zone used by an attacker) appears to prevent exploitation of this and other ActiveX vulnerabilities. Instructions for disabling ActiveX in the Internet Zone can be found in the "Securing Your Web Browser" document.

Systems Affected

VendorStatusDate Updated
Microsoft CorporationVulnerable21-Apr-2008




This vulnerability was reported by Will Dormann of the CERT/CC.

This document was written by Will Dormann.

Other Information

Date Public12/11/2007
Date First Published04/21/2008 05:29:07 PM
Date Last Updated04/21/2008
CERT Advisory 
CVE NameCVE-2007-6255
US-CERT Technical Alerts 
Document Revision6

Original Source

Url : http://www.kb.cert.org/vuls/id/570089

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-119 Failure to Constrain Operations within the Bounds of a Memory Buffer

CPE : Common Platform Enumeration

Os 1
Os 6
Os 2
Os 5

Open Source Vulnerability Database (OSVDB)

Id Description
44652 Microsoft HeartbeatCtl HRTBEAT.OCX ActiveX Unspecified Method Host Argument O...

Snort® IPS/IDS

Date Description
2014-01-10 Microsoft HeartbeatCtl ActiveX function call unicode access
RuleID : 13761 - Revision : 5 - Type : WEB-ACTIVEX
2014-01-10 Microsoft HeartbeatCtl ActiveX function call access
RuleID : 13760 - Revision : 9 - Type : BROWSER-PLUGINS
2014-01-10 Microsoft HeartbeatCtl ActiveX clsid unicode access
RuleID : 13759 - Revision : 5 - Type : WEB-ACTIVEX
2014-01-10 Microsoft HeartbeatCtl ActiveX clsid access
RuleID : 13758 - Revision : 10 - Type : BROWSER-PLUGINS

Alert History

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Date Informations
2013-05-11 12:26:40
  • Multiple Updates