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Port 1433 Details

known port assignments and vulnerabilities
threat/application/port search:
Port(s) Protocol Service Details Source
1433 tcp ms-sql-s Microsoft SQL Server.

Vulnerabilities: Check CERT advisories CA-2002-22 - multiple vulnerabilities, CA-2003-04 MS SQL Server Worm. See also Microsoft Security Bulletin [MS02-061].

The Gaobot family of worms also exploit this port.

IBM License Metric Tool ports
1433 TCP - SQL server connection
9081 TCP - HTTPS web browser connections to server
50000 TCP - DB2 server connection
52311 TCP - BigFix clients and console connect to the server

Digispid.B.Worm [Symantec-2002-052108-5430-99] (2002.05.21) - worm that spreads to computers running MS SQL server and have blank SQL admin password. Uses port 1433/tcp.
W32.Kelvir.R [Symantec-2005-041214-1218-99] (2005.04.12) - worm that spreads through MSN messenger and drops a variant of W32.Spybot.Worm. It spreads using several known MS vulnerabilities, including MS security Bulletin [MS02-061] Microsoft SQL Server 2000 or MSDE 2000 audit using port 1434/udp.

Buffer overflow in the authentication function for Microsoft SQL Server 2000 and Microsoft Desktop Engine (MSDE) 2000 allows remote attackers to execute arbitrary code via a long request to TCP port 1433, a.k.a. the "Hello" overflow.
References: [CVE-2002-1123], [BID-5411]

The database server in Siemens SIMATIC WinCC before 7.3, as used in PCS7 and other products, allows remote authenticated users to gain privileges via a request to TCP port 1433.
References: [CVE-2014-4684]
1433 tcp Microsoft SQL Server database management system Server (official) Wikipedia
1433 tcp trojan Voyager Alpha Force Trojans
80,4010,4011,1433 tcp applications Video Insight IP Server Portforward
80,1433,4000,11111 tcp applications Video Insight Server Portforward
1433 tcp,udp threat W32.Spybot Bekkoame
1433 tcp,udp ms-sql-s Microsoft-SQL-Server IANA
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Related ports: 1030  1434  4022  7022  9081  50000  52311  

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External Resources
SANS Internet Storm Center: port 1433

Port numbers in computer networking represent communication endpoints. Ports are unsigned 16-bit integers (0-65535) that identify a specific process, or network service. IANA is responsible for internet protocol resources, including the registration of commonly used port numbers for well-known internet services.
Well Known Ports: 0 through 1023.
Registered Ports: 1024 through 49151.
Dynamic/Private : 49152 through 65535.

TCP ports use the Transmission Control Protocol, the most commonly used protocol on the Internet and any TCP/IP network. TCP enables two hosts to establish a connection and exchange streams of data. TCP guarantees delivery of data and that packets will be delivered in the same order in which they were sent. Guaranteed communication/delivery is the key difference between TCP and UDP.

UDP ports use the Datagram Protocol. Like TCP, UDP is used in combination with IP (the Internet Protocol) and facilitates the transmission of datagrams from one computer to applications on another computer, but unlike TCP, UDP is connectionless and does not guarantee reliable communication; it's up to the application that received the message to process any errors and verify correct delivery. UDP is often used with time-sensitive applications, such as audio/video streaming and realtime gaming, where dropping some packets is preferable to waiting for delayed data.

When troubleshooting unknown open ports, it is useful to find exactly what services/processes are listening to them. This can be accomplished in both Windows command prompt and Linux variants using the "netstat -aon" command. We also recommend runnig multiple anti-virus/anti-malware scans to rule out the possibility of active malicious software. For more detailed and personalized help please use our forums.

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