A Denial of Service (DoS) attack denies legitimate users access to computer services (or resources), usually by overloading the service with requests or by exploiting vulnerabilities, resulting in a degradation of performance, and possibly crashing the service or even the operating system.
SMBLoris is a remote and uncredentialed DoS attack against Microsoft Windows operating systems, caused by a 20+ year old vulnerability in the Server Message Block (SMB) network protocol implementation.
- Before using the SMBLoris NBSS Denial of Service auxiliary DoS module, we need to use the
ulimit
command to set the maximum number of open file descriptors to65535
, so we can handle simultaneous connections:
root@kali:~# ulimit -n 65535 root@kali:~# ulimit -n 65535 root@kali:~#
- Now that we have set the maximum number of simultaneous connections to
65535
, we can use the SMBLoris NBSS Denial of Service auxiliary DoS module to attack our target, by simply setting the...