If you have received this Security Alert 971492 and you wish to verify whether your IIS 6.0 Web Servers have the Webdav Extension enabled, then please see below for a useful script which you can run across your environment. Please of course test this in a pre-production environment prior to deployment in your live production environment.
cscript adsutil.vbs get w3svc/WebSvcExtRestrictionList –s:ServerName
"0,<windir>\system32\inetsrv\httpext.dll,0,WEBDAV,WebDAV" means webdav is disabled,
"1,<windir>\system32\inetsrv\httpext.dll,0,WEBDAV,WebDAV" means webdav is enabled