Vulnerable Application
The R Services (rexecd, rlogind, and rshd) are a suite of unencrypted remote command/login services developed in the 1980s. These services are all but unused in modern computing, as they have been replace by telnet and ssh.
The following was done on Kali linux:
apt-get install rsh-server which includes: rexecd, rlogind and rshd.
Start the service: service openbsd-inetd start
Verification Steps
Install and configure rexec
Start msfconsole
Do: use auxiliary/scanner/rservices/rexec_login
Do: set rhosts
Set any other credentials that will need to be set
Do: run
Scenarios
A run against the configuration from these docs
msf > use auxiliary/scanner/rservices/rexec_login
msf auxiliary(rexec_login) > set username test
username => test
msf auxiliary(rexec_login) > set password 'test'
password => test
msf auxiliary(rexec_login) > run
[*] 127.0.0.1:512 - 127.0.0.1:512 - Starting rexec sweep
[+] 127.0.0.1:512 - 127.0.0.1:512, rexec 'test' : 'test'
[!] 127.0.0.1:512 - *** auxiliary/scanner/rservices/rexec_login is still calling the deprecated report_auth_info method! This needs to be updated!
[!] 127.0.0.1:512 - *** For detailed information about LoginScanners and the Credentials objects see:
[!] 127.0.0.1:512 - https://docs.metasploit.com/docs/development/developing-modules/guides/scanners/creating-metasploit-framework-loginscanners.html
[!] 127.0.0.1:512 - https://docs.metasploit.com/docs/development/developing-modules/guides/scanners/how-to-write-a-http-loginscanner-module.html
[!] 127.0.0.1:512 - *** For examples of modules converted to just report credentials without report_auth_info, see:
[!] 127.0.0.1:512 - https://github.com/rapid7/metasploit-framework/pull/5376
[!] 127.0.0.1:512 - https://github.com/rapid7/metasploit-framework/pull/5377
[*] Command shell session 2 opened (127.0.0.1:37489 -> 127.0.0.1:512) at 2017-04-27 20:56:54 -0400
[*] Scanned 1 of 1 hosts (100% complete)
[*] Auxiliary module execution completed
Confirming using NMAP
Utilizing rexec-brute
nmap -p 512 --script rexec-brute 127.0.0.1
Starting Nmap 7.40 ( https://nmap.org ) at 2017-04-27 21:23 EDT
Nmap scan report for localhost (127.0.0.1)
Host is up (0.000037s latency).
PORT STATE SERVICE
512/tcp open exec
| rexec-brute:
| Accounts:
| test:test - Valid credentials
|_ Statistics: Performed 7085940 guesses in 629 seconds, average tps: 9231.6
