Vulnerability Note VU#426737

IBM and Lenovo Access Support acpRunner ActiveX control fails to restrict access to methods

Original Release date: 14 Aug 2007 | Last revised: 23 Aug 2007

Overview

The IBM Lenovo Access Support acpRunner ActiveX control fails to restrict access to its methods, which can allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.

Description

The Access Support software package for IBM and Lenovo systems includes several ActiveX controls. This software package is also known as Automated Solutions. The acpRunner control, which is provided by AcpController.dll, provides several methods that can be used to download, extract, and run software from a remote server. The acpRunner ActiveX control fails to restrict the web domains that can take these actions.

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.

Solution

Apply an update

This issue is addressed in Automated Solutions fix pack 1. This update removes the vulnerable control and also provides an updated version of the acpRunner ActiveX control that properly restricts the web domains that can use the control.

This control also has been disabled via the kill bit in Microsoft Security Bulletin MS07-045.


Disable the acpRunner ActiveX control in Internet Explorer

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

    {E598AC61-4C6F-4F4D-877F-FAC49CA91FA3}
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_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{E598AC61-4C6F-4F4D-877F-FAC49CA91FA3}]
    "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 (Learn More)

VendorStatusDate NotifiedDate Updated
IBM CorporationAffected01 Feb 200725 Apr 2007
LenovoAffected13 Mar 200725 Apr 2007
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A N/A

References

Credit

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

This document was written by Will Dormann.

Other Information

  • CVE IDs: CVE-2007-2929
  • Date Public: 14 Aug 2007
  • Date First Published: 14 Aug 2007
  • Date Last Updated: 23 Aug 2007
  • Severity Metric: 2.89
  • Document Revision: 9

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