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Microsoft Patches Wormable RCE Vulns in Remote Desktop Services
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tdsan
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tdsan,
User Rank: Ninja
8/15/2019 | 12:55:10 PM
Re: We talked about this before

Yes, we do the same thing but we do it at the router or firewall where the port on the outside is 3288 which is redirected to 3389, but we also limit who can access that port as well (ACLs that limit our local offices or we use a jump host with login credentials, but a valid point you made earlier.

Todd
REISEN1955
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REISEN1955,
User Rank: Ninja
8/15/2019 | 9:55:41 AM
Re: We talked about this before
Port 3389 - also a known problem and I have always disabled that and moved TCP/IP to another available port whenever possible.  
tdsan
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tdsan,
User Rank: Ninja
8/14/2019 | 5:12:10 PM
We talked about this before

The vulnerabilities exist in Remote Desktop Services, formerly known as Terminal Services, when an unauthenticated attacker connects to a target system using RDP and sends specially crafted requests.

I think there was a similar article you wrote where we talking about the same issue with RDP (not sure) but it seems the underlying thread is that users who have access to RDP, it is not being authenticated. At somepoint if we don't have controls in place, individuals or nation-states are going to breach that system. I would look at the following items:
  • Add IP address range to only allow internal or external site connections
  • The section of the image where it says "Remote IP Address", select  "These IP Addressess" | "Predefined set of Computers" | Select "LocalSubnet" and if there is a range of external addresses, then add as needed
  • Next go to Start | Run | Type "sysdm.cpl" | Select the Tab "Remote", and make your selection based on security level
  • Image result for rdp require the connection to be encrypted'
  • The last part would be to customize the RDP session to enable authentication and encryption

I think these steps mentioned should address the problem, but it seems we continue to see the same problem.

Oh well, on the journey to enlightenment, we need to be forever vigilant.

Todd

 

 


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