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Port 110 Details
known port assignments and vulnerabilities
threat/application/port search:
| Port(s) |
Protocol |
Service |
Details |
Source |
| 110 |
udp |
pop-or-not |
POP3 server traffic (should be TCP only?)
Final Fantasy XI also uses this port. |
SG
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| 110 |
tcp |
POP3 |
POP3 (Post Office Protocol - Version 3)
Security Concerns: Re-usable cleartext password, no auditing of connections & attempts thus subject to grinding. Some POP3 server versions have had buffer overflow problems. CERT Advisories: CA-97.09
ADM, ProMail trojans also use port 110 (TCP).
Integer overflow in inetcomm.dll in Microsoft Outlook Express 5.5 SP2, 6, and 6 SP1; Windows Live Mail on Windows XP SP2 and SP3, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, and R2, and Windows 7; and Windows Mail on Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, and R2, and Windows 7 allows remote e-mail servers and man-in-the-middle attackers to execute arbitrary code via a crafted (1) POP3 or (2) IMAP response, as demonstrated by a certain +OK response on TCP port 110, aka "Outlook Express and Windows Mail Integer Overflow Vulnerability."
References: [CVE-2010-0816] [BID-40052]
Integer overflow in eXtremail 2.1.1 and earlier allows remote attackers to cause a denial of service, and possibly execute arbitrary code, via a long USER command containing "%s" sequences to the pop3 port (110/tcp), which are expanded to "%%s" before being used in the memmove function, possibly due to an incomplete fix for [CVE-2001-1078].
References: [CVE-2007-5467] [BID-26074] [SECUNIA-27220]
The POP3 service in YahooPOPs (aka YPOPs!) 1.6 allows a remote denial of service (reboot) via a long string to TCP port 110, a related issue to CVE-2004-1558.
References: [CVE-2024-24736] |
SG
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| 110 |
tcp |
|
Post Office Protocol 3 (POP3) (official) |
Wikipedia
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| 110 |
tcp |
trojan |
ADM worm |
Trojans
|
| 110 |
tcp,udp |
pop-3 |
PostOffice V.3 |
SANS
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| 110 |
tcp |
ProMailtrojan |
[trojan] ProMail trojan |
SANS
|
| 110 |
tcp,udp |
applications |
POP3 |
Portforward
|
| 110 |
tcp,udp |
pop3 |
PostOffice V.3 |
Nmap
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| 110 |
tcp |
threat |
Bancos |
Bekkoame
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| 110 |
tcp |
threat |
Civcat |
Bekkoame
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| 110 |
tcp,udp |
pop3 |
Post Office Protocol - Version 3 |
IANA
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11 records found
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jump to:
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Related ports: 25 443 25 109 143 587 993 995
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External Resources
SANS ISC: port 110
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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