Hello Nick and people on the list I have seen 2 servers last month which have been hacked and actively used to scan TCP 3372 on foreign IPs There were servers which had port 3372 accessible (a firewall rule misconfiguration was making TCP ports >3000 accessible on the Internet) I was not able to find any tool which was used to hack the server on this port, but I think DTC was the culprit. These servers had also port 53 (DNS) accessible, they were running win2k with about 3 weeks of patch missing, no other services were on (no iis, "server" service turned off, on TCP/IP binded on NIC, ...) I found tools on the hacked servers : "infoscan.exe" 1.0 from uhhuhy (cnhonker.com), and dfind.exe from class101.org, and log files of recent scans which were corresponding to the complaints the server's owner received. The tools were placed in recycler directory, the hacker seems to have been able to send commands or get a remote shell. I'd be interested to hear information about remote code execution on this port if you find some, these details make me think a serious problem exists in DTC service. Thanks and have a nice day Maxime Ducharme -----Message d'origine----- De : Nick Boyce [mailto:nick.boyce@xxxxxxxxx] Envoyé : 13 mai, 2006 20:25 À : bugtraq@xxxxxxxxxxxxxxxxx Objet : Is MS06-018 a DoS or a system compromise ? There seems to be some confusion in MS Security Bulletin MS06-018, "Vulnerability in Microsoft Distributed Transaction Coordinator". The bulletin itself (http://www.microsoft.com/technet/security/bulletin/ms06-018.mspx) states : "An attacker could cause the Microsoft Distributed Transaction Coordinator (MSDTC) to stop responding. Note that the denial of service vulnerability would not allow an attacker to execute code or to elevate their user rights, but it could cause the affected system to stop accepting requests." whereas the linked download pages for both the Win2K and WinXP patches http://www.microsoft.com/downloads/details.aspx?familyid=8B98F380-0E5C-4B80- 9710-95E1B35AFD83&displaylang=en http://www.microsoft.com/downloads/details.aspx?familyid=D80B43B2-727B-46B6- 82D1-F2CBD916FE32&displaylang=en state : "A security issue has been identified in the Microsoft Distributed Transaction Controller service that could allow an attacker to compromise your Windows-based system and gain control over it." The related McAfee advisory (http://seclists.org/lists/bugtraq/2006/May/0215.html) states : "Exploitation can at most lead to a denial of service and therefore the risk factor is at medium." so I guess DoS is what it is ... but it would still be nice if someone in the know could confirm the download pages are wrong .... anyone from Microsoft here ? Cheers Nick Boyce -- One way to make your old car run better is to look up the price of a new model.
