Vulnerability Note VU#548964

Microsoft Windows BR549.DLL ActiveX control contains vulnerability

Original Release date: 26 Aug 2003 | Last revised: 12 Sep 2003


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.

Systems Affected (Learn More)

VendorStatusDate NotifiedDate Updated
Microsoft CorporationAffected25 Aug 200325 Aug 2003
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



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

This document was written by Art Manion.

Other Information

  • CVE IDs: CAN-2003-0530
  • CERT Advisory: CA-2003-22
  • Date Public: 20 Aug 2003
  • Date First Published: 26 Aug 2003
  • Date Last Updated: 12 Sep 2003
  • Severity Metric: 7.78
  • Document Revision: 16


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