|
Port 1723 Details
known port assignments and vulnerabilities
threat/application/port search:
| Port(s) |
Protocol |
Service |
Details |
Source |
| 1723 |
tcp,udp |
PPTP |
PPTP VPN (Point-to-Point Tunneling Protocol Virtual Private Networking).
PPTP has a number of known vulnerabilities. It is no longer considered secure, as cracking the initial MS-CHAPv2 authentication can be reduced to the difficulty of cracking a single DES 56-bit key, which can be brute-forced in a short period of time. It is prone to MITM (man in the middle) attacks, where an attacker can capture the handshake and do an offline attack to derive the RC4 key and decrypt the traffic. PPTP is also vulnerable to bit-flipping attacks, i.e. an attacker can modify PPTP packets without possibility of detection. OpenVPN with AES encryption is a much more secure choice.
See also:
port 500/udp (IPSec IKE)
port 1701/tcp (L2TP)
port 1194/udp (OpenVPN)
QNAP NAS uses port 1723/TCP for PPTP VPN. It can also use 1194/UDP (OpenVPN), and a number of other ports, as follows: 80,8081/TCP (web server), 443,8080/TCP (web admin), 20,21,22/TCP (FTP/SSH), 13131/TCP (telnet), 873,8899/TCP (remote replication), 20001/UDP (CloudLink - optional, only required for access without manual port forwarding)
Mac OS X Server VPN service also uses port 1723 (TCP).
The Siemens Gigaset SE361 WLAN router allows remote attackers to cause a denial of service (device reboot) via a flood of crafted TCP packets to port 1723.
References: [CVE-2009-3322] [BID-36366]
SMC Networks Barricade Wireless Cable/DSL Broadband Router SMC7004VWBR allows remote attackers to cause a denial of service via certain packets to PPTP port 1723 on the internal interface.
References: [CVE-2003-0419]
The PPTP implementation in Cisco IOS 12.2 and 15.0 through 15.3, when NAT is used, allows remote attackers to cause a denial of service (device reload) via crafted TCP port-1723 packets, aka Bug ID CSCtq14817.
References: [CVE-2013-5481] |
SG
|
| 1723 |
tcp,udp |
|
Microsoft Point-to-Point Tunneling Protocol (PPTP) (official) |
Wikipedia
|
| 1723 |
tcp |
pptp |
Point-to-point tunnelling protocol |
SANS
|
| 1723 |
udp |
pptp |
pptp |
SANS
|
| 1723 |
tcp |
applications |
Point-to-Point Tunneling Protocol |
Portforward
|
| 1723 |
tcp |
pptp |
Point-to-point tunnelling protocol |
Nmap
|
| 1723 |
tcp,udp |
pptp |
pptp |
IANA
|
|
7 records found
Related ports: 500 1194 1701 4500
|