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Inbound connection in port 593 (TCP) is not blocked in Windows firewall

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  • Misconfiguration Name
  • Inbound connection in port 593 (TCP) is not blocked in Windows firewall
  • Description
  • MS Security Bulletin [MS03-026] indicates a critical Remote Procedure Call (RPC) vulnerability that can be exploited via ports 593. To prevent this, disable the port 593 at the firewall and restrict RPC over unsecure networks.
  • Severity
  • Moderate
  • Category
  • Windows Firewall
  • Resolution
  • Follow the below steps to resolve the misconfiguration. Step 1: Open the Control Panel Step 2: Click on Windows Firewall/ Windows Defender firewall Step 3: Navigate to advanced settings. Step 4:Right click on inbound rules and click on new rule. Step 6:Select port and press next Step 7:Specify the port 593 under specific local ports, select TCP and press next. Step 8:click on block the connection and click next. Step 9:Select Domain, Private and Public and click next. Step 10:Give a name and description and click finish.
  • Does remediation require reboot?
  • No

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