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known port assignments and vulnerabilities
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| Port(s) | Protocol | Service | Details | Source |
|---|---|---|---|---|
| 8081 | tcp | http | Hyper Text Transfer Protocol (HTTP) - alternative ports used for web traffic. See also TCP ports 80, 81, 8080. Dreambox 8000 also uses port 8081 (TCP/UDP). Azure Cosmos DB Emulator uses port 8081 by default. https://docs.microsoft.com/en-us/azure/cosmos-db/local-emulator McAfee ePO uses these ports: If you're not running web services on this ports, keep in mind that some trojans also use it: A vulnerability has been reported in McAfee Agent, which can be exploited by malicious people to cause a DoS (Denial of Service). The vulnerability is caused due to an unspecified error within the McAfee Framework Service (FrameworkService.exe) when handling HTTP requests and can be exploited to cause a crash by sending a specially crafted HTTP request to default TCP port 8081. A non-privileged user of the Siemens web application RUGGEDCOM NMS < V1.2 on port 8080/TCP and 8081/TCP could perform a persistent Cross-Site Scripting (XSS) attack, potentially resulting in obtaining administrative permissions. The Siemens web application RUGGEDCOM NMS < V1.2 on port 8080/TCP and 8081/TCP could allow a remote attacker to perform a Cross-Site Request Forgery (CSRF) attack, potentially allowing an attacker to execute administrative operations, provided the targeted user has an active session and is induced to trigger a malicious request. An issue was discovered on Neato Botvac Connected 2.2.0 devices. They execute unauthenticated manual drive commands (sent to /bin/webserver on port 8081) if they already have an active session. Commands like forward, back, arc-left, arc-right, pivot-left, and pivot-right are executed even though the web socket replies with { "message" : "invalid authorization header" }. Without an active session, commands are still interpreted, but (except for eco-on and eco-off) have no effect, since without active driving, a driving direction does not change anything. A replay issue was discovered on Neato Botvac Connected 2.2.0 devices. Manual control mode requires authentication, but once recorded, the authentication (always transmitted in cleartext) can be replayed to /bin/webserver on port 8081. There are no nonces, and timestamps are not checked at all. | SG |
| 8081 | tcp | HTTP alternate, e.g. McAfee ePolicy Orchestrator (ePO) (unofficial) | Wikipedia | |
| 8081 | tcp | blackice | BlackICE ICEcap | SANS |
| 8081 | tcp | blackice-icecap | ICECap user console | Nmap |
| 8081 | tcp | nai-epolicy | NAI McAfee EPO ePolicy Orchestrator HTTP | Neophasis |
| 8081 | tcp | threat | Danmec | Bekkoame |
| 8081 | tcp | threat | W32.Bufei | Bekkoame |
| 8081 | tcp,udp | sunproxyadmin | Sun Proxy Admin Service, registered 2005-08 | IANA |
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Related ports: 80 443 591 8008 8009 8080 8443
External Resources
SANS ISC: port 8081
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.
| Please use the "Add Comment" button below to provide additional information or comments about port 8081.
I believe you can add Azure Cosmos DB Emulator to the list, it's default port is 8081.
by anonymous Thanks, confirmed my suspicions of this.
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