ISS included information in its alert that explains how to properly use the Lockdown Tool and verify that WebDAV is disabled, Ingevaldson said.
Other utilities were provided for organizations that require the use of IIS, but could not apply the patch or deploy the Lockdown Tool.
The latest announcement recalls earlier Microsoft vulnerabilities that set the stage for the devastating Code Red and NIMDA worms, according to Ian Hameroff, a security strategist at Computer Associates International.
Adding to the danger of the new vulnerability is the fact that many administrators may not know that they have the WebDAV service enabled on their IIS server, Hameroff said.
The service is enabled by default on IIS 5, according to Hameroff.
Computer Associates is encouraging its customers to follow Microsoft's instructions for patching IIS or for shutting down the vulnerable WebDAV component on their IIS Web server. "We're warning our users that this is an open door to their business that needs to be shut," Hameroff said.
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