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Port 1434 Details

known port assignments and vulnerabilities
threat/application/port search:
Port(s) Protocol Service Details Source
1434 tcp,udp ms-sql-s Microsoft SQL Server.

Vulnerabilities: Check CERT advisories CA-2002-22 - multiple vulnerabilities, CA-2003-04 MS SQL Server Worm. The Gaobot family of worms also exploit this port.

See also: Microsoft Security Bulletin [MS02-061].

Digispid.B.Worm (05.21.2002) - worm that spreads to computers running MS SQL server and have blank SQL admin password. Uses port 1433/tcp.
W32.Kelvir.R (04.12.2005) - 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 a component of SQL-DMO for Microsoft Data Access Components (MDAC) 2.5 through 2.7 allows remote attackers to execute arbitrary code via a long response to a broadcast request to UDP port 1434.
References: [CVE-2003-0353] [BID-8455]
1434 udp Microsoft SQL Server database management system Monitor (official) Wikipedia
1434 tcp,udp threat W32.Spybot Bekkoame
1434 tcp,udp threat W32.SQLExp.Worm Bekkoame
1434 udp threat W32.Gaobot Bekkoame
1434 udp threat W32.Kelvir Bekkoame
1434 udp threat W32.Kiman Bekkoame
1434 udp threat W32.Spybot Bekkoame
1434 tcp,udp ms-sql-m Microsoft-SQL-Monitor IANA
9 records found
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Related ports: 1433  4022  7022  

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External Resources
SANS Internet Storm Center: port 1434

Well Known Ports: 0 through 1023.
Registered Ports: 1024 through 49151.
Dynamic/Private : 49152 through 65535.

TCP ports use the Transmission Control Protocol. TCP is the most commonly used protocol on the Internet and any TCP/IP network. Whereas the IP protocol deals only with packets, 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, a communications protocol for the Internet network, transport, and session layers. Like TCP (Transmission Control Protocol), UDP is used with IP (the Internet Protocol) and makes possible 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, 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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