Description of problem:

The default ssd filter file /etc/fail2ban/filter.d/sshd.conf, does not protect against brute force password guessing if using pam_sss for authentication. 

Version-Release number of selected component (if applicable):
0.9.7-1.el7

How reproducible:
Every time


Steps to Reproduce:
1. Using the default filter.d/sshd.conf file with using pam_sss.so for password-auth
2. Attempt to login using a valid username but invalid password 
3. The IP address will never be banned as the line below in /var/log/secure will never match a filter in /etc/fail2ban/filter.d/sshd.conf
pam_sss(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=hostname user=username

Actual results:
The IP address will never be banned,


Expected results:
The IP address should be banned after typing in the wrong password 5 times.


Additional info:
the fix is simple
the line
 ^%(__prefix_line_sl)spam_unix\(sshd:auth\):\s+authentication failure;\s*logname=\S*\s*uid=\d*\s*euid=\d*\s*tty=\S*\s*ruser=\S*\s*rhost=<HOST>\s.*%(__suff)s$
should be replaced with,but maybe the .+ in too aggressive? should be tested
 ^%(__prefix_line_sl)spam_.+\(sshd:auth\):\s+authentication failure;\s*logname=\S*\s*uid=\d*\s*euid=\d*\s*tty=\S*\s*ruser=\S*\s*rhost=<HOST>\s.*%(__suff)s$