Buffer overflow in the ScStoragePathFromUrl function in the WebDAV service in Internet Information Services (IIS) 6.0 in Microsoft Windows Server 2003 R2 allows remote attackers to execute arbitrary code via a long header beginning with "If: <http://" in a PROPFIND request, as exploited in the wild in July or August 2016.
https://www.exploit-db.com/exploits/41992/
https://www.exploit-db.com/exploits/41738/
https://github.com/rapid7/metasploit-framework/pull/8162
https://github.com/edwardz246003/IIS_exploit
https://github.com/danigargu/explodingcan
https://0patch.blogspot.com/2017/03/0patching-immortal-cve-2017-7269.html