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Port 102 Details

known port assignments and vulnerabilities
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Port(s) Protocol Service Details Source
102 tcp,udp iso-tsap Port used by X.400, X.500, ITOT, ISO-TSAP (Transport Service Access Point) protocol.

Microsoft Exchange uses this port for X.400 mail messaging traffic. No known vulnerabilities, but similar to data-driven attacks common to smtp plus possible direct attacks, such as with sendmail. Always static route inbound mail to a protected/hardened email server.

X.500 Directory Service - Used to distribute user names, user info and public keys.
Security Concerns: Depending on vendor implementation probes can reveal valuable user info for follow-on attacks. On poorly configured servers attackers can replace public keys for data capture or DOS purposes.

[RFC1006] [RFC2126]

Siemens SIMATIC S7-1200 PLCs 2.x and 3.x allow remote attackers to cause a denial of service (defect-mode transition and control outage) via crafted packets to TCP port 102 (aka the ISO-TSAP port).
References: [CVE-2013-0700]

Siemens SIMATIC HMI Comfort Panels before WinCC (TIA Portal) 13 SP1 Upd2 and SIMATIC WinCC Runtime Advanced before WinCC (TIA Portal) 13 SP1 Upd2 allow man-in-the-middle attackers to cause a denial of service via crafted packets on TCP port 102.
References: [CVE-2015-2822]

Siemens SIMATIC S7-300 CPU devices allow remote attackers to cause a denial of service (defect-mode transition) via crafted packets on (1) TCP port 102 or (2) Profibus.
References: [CVE-2015-2177]

Siemens SIMATIC CP 343-1 Advanced devices before 3.0.44, CP 343-1 Lean devices, CP 343-1 devices, TIM 3V-IE devices, TIM 3V-IE Advanced devices, TIM 3V-IE DNP3 devices, TIM 4R-IE devices, TIM 4R-IE DNP3 devices, CP 443-1 devices, and CP 443-1 Advanced devices might allow remote attackers to obtain administrative access via a session on TCP port 102.
References: [CVE-2015-8214]

Delf, Skun trojans also use this port (TCP).
102 tcp ISO-TSAP (Transport Service Access Point) Class 0 protocol (official) Wikipedia
102 tcp trojan Delf, Skun Trojans
102 tcp,udp iso-tsap ISO-TSAP Class 0 IANA
102 tcp,udp iso-tsap tsap ISO-TSAP Class 0 Nmap
102 tcp,udp iso-tsap ISO Transport Service Access Point Neophasis
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Related ports: 103  

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External Resources
SANS Internet Storm Center: port 102

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 102.
  User Reviews/Comments:
by bilal - 2012-07-12 12:13
Additionally, this port used for some industrial device or otomotion components comminication.
Like Siemens S7 devices uses this port for send&recive messages to other devices or scada hmi components...
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