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Nmap, Penetration Testing

Finding Vulnerability in Server/Client using Nmap

Heartbleed bug

The Heartbleed Bug is a serious vulnerability in the popular OpenSSL cryptographic software library. This weakness allows stealing the information protected by the SSL/TLS encryption used to secure the Internet.  

Open terminal in kali

nmap –script=ssl-heartbleed

Check the output from Nmap to see whether the server is vulnerable or not.

Poodle Bug

The POODLE attack is a man-in-the-middle exploit which takes advantage of Internet and security software clients’ fallback to SSL 3.0.  -“Wikipedia”.

 Open terminal in kali

nmap  –script  ssl-poodle

IRC Backdoor

Checks if an IRC server is backdoored by running a time-based command (ping) and checking how long it takes to respond. This script can be used to run an arbitrary command on the remote system. 

Open terminal in kali

nmap -sV –script=irc-unrealircd-backdoor  -p 6667

MS08-67 Vulnerability

Detects Microsoft Windows systems vulnerable to the remote code execution vulnerability known as MS08-067. This check is dangerous and it may crash systems.

Open terminal in kali

nmap  –script  smb-vuln-ms08-067  -p 445

DOS Vulnerability

Checks if a machine is vulnerable to MS12-020. RDP vulnerability addresses a denial of service vulnerability inside Terminal Server.

nmap -sV –script=rdp-ms12-020  -p 3389

Vsftpd Backdoor

Tests for the presence of the vsFTPd 2.3.4 backdoor reported CVE-2011-2523. This script attempts to exploit the backdoor using the innocuous id command by default, but that can be changed with the exploit.cmd or ftp-vsftpd-backdoor.cmd script arguments.

nmap –script ftp-vsftpd-backdoor  -p 21

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