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Scan Port by External Port Scanner

Scan Port by External Port Scanner(nmap)

Starting with Vuls v0.13, port scanning is available to make related vulnerabilities more visible.

Unless you write the config [servers.xxx-xxx-xxx-xxx.portscan], it will use the port scanning feature of the Vuls built-in. The following config.toml will use an external scanner (currently only nmap is supported) in scannerBinPath to scan ports.

  • config.toml
[servers]

[servers.127-0-0-1]
host                = "127.0.0.1"
port               = "22"
user               = "root"
scanMode           = ["fast-root"]
scanModules        = ["ospkg", "port"]

[servers.127-0-0-1.portscan]
scannerBinPath = "/usr/bin/nmap"
hasPrivileged = true
scanTechniques = ["sS"]
sourcePort = "65535"

  • scannerBinPath: PATH to the external scanner to be executed for port scanning in Vuls. Currently only nmap is supported.

  • hasPrivileged: Allows you to specify whether you have enough privileges to perform operations that require root privileges on UNIX systems (--privileged). The following options affect scanTechniques, sourcePort. If you want to use this function as a non-root user, you need to set the capability appropriately. Try running the following command, and if the capability is set as well, it should work well. See also this document.

$ getcap /usr/bin/nmap
/usr/bin/nmap = cap_net_bind_service,cap_net_admin,cap_net_raw+eip
  • scanTechniques: Allows you to specify the method of port scanning. Currently, the following are supported. Note that you need to set hasPrivileged to true if you want to use a scanning method other than -sT.
SCAN TECHNIQUES:
  -sS/sT/sA/sW/sM: TCP SYN/Connect()/ACK/Window/Maimon scans
  -sN/sF/sX: TCP Null, FIN, and Xmas scans.
  • sourcePort: packets will be sent from the specified single port number, if possible(-g). The port number can be from 0 to 65535, but if 0 is specified, it may not work on all systems, so a validation error is raised. sourcePort(-g) is incompatible with the default TCPConnect scan (-sT). If you want to set the source port, use a raw scan such as -sS.

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