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Toast.net Performance Testing

Port 53 Details


known port assignments and vulnerabilities
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Port(s) Protocol Service Details Source
53 tcp,udp DNS DNS (Domain Name Service) is used for domain name resolution.

Apple MacDNS, FaceTime also use this port.

There are some attacks that target vulnerabilities within DNS servers. Some trojans also use this port: ADM worm, li0n, MscanWorm, MuSka52, Trojan.Esteem.C (05.12.2005), W32.Spybot.ABDO (12.12.2005).

W32.Dasher.B (12.16.2005) - a worm that exploits the MS Distributed Transaction Coordinator Remote exploit (MS Security Bulletin [MS05-051]).
Listens for remote commands on port 53/tcp. Connects to an FTP server on port 21211/tcp. Scans for systems vulnerable to the [MS05-051] exploit on port 1025/tcp.

Xbox LIVE uses ports 53 tcp/udp, 80 tcp, 88 udp, 3074 tcp/udp.

Bonk (DoS) trojan horse also uses port 53 (TCP).

Siemens Gigaset SE461 WiMAX router 1.5-BL024.9.6401, and possibly other versions, allows remote attackers to cause a denial of service (device restart and loss of configuration) by connecting to TCP port 53, then closing the connection.
References: [CVE-2009-1152] [BID-34220]

Stack-based buffer overflow in the dns_decode_reverse_name function in dns_decode.c in dproxy-nexgen allows remote attackers to execute arbitrary code by sending a crafted packet to port 53/udp, a different issue than [CVE-2007-1465].
References: [CVE-2007-1866] [SECUNIA-24688]

Kerio Personal Firewall (KPF) 2.1.4 has a default rule to accept incoming packets from DNS (UDP port 53), which allows remote attackers to bypass the firewall filters via packets with a source port of 53.
References: [CVE-2003-1491] [BID-7436]
SG
53 tcp,udp Domain Name System (DNS) (official) Wikipedia
53 tcp trojan ADM worm, li0n, MscanWorm, MuSka52 Trojans
53 tcp,udp domain Domain Name Server IANA
53 udp applications Lineage II Portforward
53,80,443,10070-10080 tcp applications Socom, Socom 2. Also uses ports 6000-6999,10070 udp Portforward
53,80,443,10070,10080 tcp applications Twisted Metal Black Online (also uses ports 6000-6999 udp) Portforward
53 tcp ADMworm [trojan] ADM worm Neophasis
53 tcp Lion [trojan] Lion Neophasis
53 tcp threat Civcat Bekkoame
53 tcp threat Esteems Bekkoame
53 tcp threat W32.Dasher Bekkoame
53 tcp threat W32.Spybot Bekkoame
13 records found
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Related ports: 80  88  953  1025  3074  21211  

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External Resources
SANS Internet Storm Center: port 53

Notes:
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.

Please use the "Add Comment" button below to provide additional information or comments about port 53.
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by clairmont32 - 2014-02-18 12:21
Trojan.Zbot uses a 12 character DGA query for internet connectivity checks.
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