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Port 30003 Details


known port assignments and vulnerabilities
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Port(s) Protocol Service Details Source
30003 tcp trojan Lamers Death trojan

tcsd in TrouSerS before 0.3.10 allows remote attackers to cause a denial of service (daemon crash) via a crafted type_offset value in a TCP packet to port 30003.
References: [CVE-2012-0698]

In Universal Robots Robot Controllers Version CB 3.1, SW Version 3.4.5-100, ports 30001/TCP to 30003/TCP listen for arbitrary URScript code and execute the code. This enables a remote attacker who has access to the ports to remotely execute code that may allow root access to be obtained.
References: [CVE-2018-10635], [BID-104710]
SG
30003 tcp LamersDeath [trojan] Lamers Death SANS
30003 tcp,udp amicon-fpsu-ra Amicon FPSU-IP Remote Administration, registered 2013-04-25 IANA
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Related ports: 30001  30002  

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External Resources
SANS ISC: port 30003

Notes:
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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