LEAD Technologies JPEG 2000 ActiveX control buffer overflow

ID VU:440112
Type cert
Reporter CERT
Modified 2007-05-18T00:00:00



The LEAD Technologies JPEG 2000 ActiveX control contains a buffer overflow, which can allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.


LEAD Technologies provides imaging software for Windows. The LEAD JPEG 2000 ActiveX control, which is provided by LTJ2K14.ocx, contains a buffer overflow in the BitmapDataPath property.


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. The attacker could also cause Internet Explorer (or the program using the WebBrowser control) to crash.


We are currently unaware of a practical solution to this problem. Please consider the following workarounds

Disable the LEAD JPEG 2000 ActiveX control in Internet Explorer

The vulnerable 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_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{00140020-B1BA-11CE-ABC6-F5B2E79D9E3F}]
"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

Vendor| Status| Date Notified| Date Updated
LEAD Technologies, Inc.| | 12 Feb 2007| 18 May 2007
If you are a vendor and your product is affected, let us know.

CVSS Metrics

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


  • <http://www.cert.org/tech_tips/securing_browser/#Internet_Explorer>
  • <http://moaxb.blogspot.com/2007/05/moaxb-18-leadtools-jpeg-2000-com.html>
  • <http://secunia.com/advisories/25313/>


This vulnerability was reported by Will Dormann of CERT/CC, however it was publicly disclosed by shinnai before the vendor could provide a fix.

This document was written by Will Dormann.

Other Information

  • CVE IDs: Unknown
  • Date Public: 18 May 2007
  • Date First Published: 18 May 2007
  • Date Last Updated: 18 May 2007
  • Severity Metric: 4.97
  • Document Revision: 5