Executive Summary

Title Yahoo! Installer Plugin for Widgets ActiveX control stack buffer overflow
Name VU#120760 First vendor Publication 2007-08-17
Vendor VU-CERT Last vendor Modification 2007-08-21
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#120760

Yahoo! Installer Plugin for Widgets ActiveX control stack buffer overflow


The Yahoo! Installer Plugin for Widgets ActiveX control contains a stack buffer overflow, which can allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.

I. Description

Yahoo! Widgets is a program for Windows that allows the user to run applications called "widgets." Yahoo! Widgets includes an ActiveX control called Yahoo! Installer Plugin for Widgets. This ActiveX control, which is provided by YDPCTL.dll, contains a stack buffer overflow in the GetComponentVersion() method.

Exploit code for this vulnerability is publicly available.

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 the July 24, 2007 Widgets Security Updates.

Disable the Yahoo! Installer Plugin for Widgets 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{7EC7B6C5-25BD-4586-A641-D2ACBB6629DD}]
    "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
Yahoo, Inc.Vulnerable17-Aug-2007




This vulnerability was reported by Parvez Anwar.

This document was written by Will Dormann.

Other Information

Date Public07/27/2007
Date First Published08/17/2007 04:38:45 PM
Date Last Updated08/21/2007
CERT Advisory 
CVE NameCVE-2007-4034
Document Revision4

Original Source

Url : http://www.kb.cert.org/vuls/id/120760

CWE : Common Weakness Enumeration

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

SAINT Exploits

Description Link
Yahoo! Widgets ActiveX control GetComponentVersion buffer overflow More info here

Open Source Vulnerability Database (OSVDB)

Id Description
37705 Yahoo! Widgets YDP YDPCTL.YDPControl.1 ActiveX (YDPCTL.dll) GetComponentVersi...

Snort® IPS/IDS

Date Description
2014-01-10 Yahoo Widgets Engine ActiveX function call unicode access
RuleID : 12196 - Revision : 7 - Type : WEB-ACTIVEX
2014-01-10 Yahoo Widgets Engine ActiveX function call access
RuleID : 12195 - Revision : 11 - Type : BROWSER-PLUGINS
2014-01-10 Yahoo Widgets Engine ActiveX clsid unicode access
RuleID : 12194 - Revision : 7 - Type : WEB-ACTIVEX
2014-01-10 Yahoo Widgets Engine ActiveX clsid access
RuleID : 12193 - Revision : 15 - Type : BROWSER-PLUGINS

Nessus® Vulnerability Scanner

Date Description
2007-07-27 Name : The remote Windows host has an ActiveX control that is affected by a buffer o...
File : yahoo_widgets_ydp_activex_overflow.nasl - Type : ACT_GATHER_INFO