search menu icon-carat-right cmu-wordmark

CERT Coordination Center

Microsoft Windows BR549.DLL ActiveX control contains vulnerability

Vulnerability Note VU#548964

Original Release Date: 2003-08-26 | Last Revised: 2003-09-12


The Microsoft Windows BR549.DLL ActiveX control, which provides support for the Windows Reporting Tool, contains an unknown vulnerability. The impact of this vulnerability is not known.


Microsoft Security Bulletin MS03-032 briefly describes a vulnerability in the BR549.DLL ActiveX control:

This patch also sets the Kill Bit on the BR549.DLL ActiveX control. This control implemented support for the Windows Reporting Tool, which is no longer supported by Internet Explorer. The control has been found to contain a security vulnerability. To protect customers who have this control installed, the patch prevents the control from running or from being reintroduced onto users' systems by setting the Kill Bit for this control.
The vulnerability may be a buffer overflow. Presumably, the ActiveX control could be instantiated by Internet Explorer (IE) and the vulnerability could be exploited when a victim viewed a specially crafted HTML document such as a web page or HTML email message.

The class ID (CLSID) for this ActiveX control is 167701E3-FDCF-11D0-A48E-006097C549FF.


The impact of this vulnerability is not known. In the case of a buffer overflow, a remote attacker could execute arbitrary code with the privileges of the user running IE. The attacker could also cause a denial of service.


Apply patch
Apply 822925 or a more recent cumulative patch for IE. See Microsoft Security Bulletin MS03-032.

Vendor Information


Microsoft Corporation Affected

Notified:  August 25, 2003 Updated: August 25, 2003



Vendor Statement

Please see Microsoft Security Bulletin MS03-032.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.


The CERT/CC has no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

CVSS Metrics

Group Score Vector



Microsoft credits Greg Jones of KPMG UK for reporting this vulnerability.

This document was written by Art Manion.

Other Information

CVE IDs: CVE-2003-0530
CERT Advisory: CA-2003-22
Severity Metric: 7.78
Date Public: 2003-08-20
Date First Published: 2003-08-26
Date Last Updated: 2003-09-12 15:35 UTC
Document Revision: 16

Sponsored by CISA.