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Merge branch 'dovecot' of https://github.com/grooverdan/fail2ban 

* 'dovecot' of https://github.com/grooverdan/fail2ban:
  TST: attempts at injection with username=rhost=1.2.3.4 have no user= logged in dovecot-1.2.15
  ENH: dovecot regexs rewritten and extra failures

Conflicts:
	ChangeLog -- merged entries
pull/265/merge
Yaroslav Halchenko 2013-06-14 12:14:40 -04:00
parent 948be73115 e8b6acfa65
commit ab2c738b43
3 changed files with 22 additions and 11 deletions
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3
ChangeLog
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@ -16,7 +16,8 @@ ver. 0.8.11 (2013/XX/XXX) - wanna-be-released
- Enhancements:
Daniel Black
* filter.d/{asterisk,assp}.conf -- regex hardening
* filter.d/{asterisk,assp,dovecot}.conf -- regex hardening and
extra failure examples in sample logs
ver. 0.8.10 (2013/06/12) - wanna-be-secure
-----------

21
config/filter.d/dovecot.conf
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@ -1,20 +1,23 @@
# Fail2Ban configuration file for dovcot
# Fail2Ban configuration file for dovecot
#
# Author: Martin Waschbuesch
#
#
# Daniel Black (rewrote with begin and end anchors)
[INCLUDES]
before = common.conf
[Definition]
_daemon = dovecot(-auth)?
# Option: failregex
# Notes.: regex to match the password failures messages in the logfile. The
# host must be matched by a group named "host". The tag "<HOST>" can
# be used for standard IP/hostname matching and is only an alias for
# (?:::f{4,6}:)?(?P<host>[\w\-.^_]+)
# Notes.: regex to match the password failures messages in the logfile.
# first regex is essentially a copy of pam-generic.conf
# Values: TEXT
#
failregex = .*(?:pop3-login|imap-login):.*(?:Authentication failure|Aborted login \(auth failed|Aborted login \(tried to use disabled|Disconnected \(auth failed).*\s+rip=(?P<host>\S*),.*
pam.*dovecot.*(?:authentication failure).*\s+rhost=<HOST>(?:\s+user=.*)?\s*$
failregex = ^%(__prefix_line)s(pam_unix(?:\(\S+\))?:)?\s+authentication failure; logname=\S* uid=\S* euid=\S* tty=dovecot ruser=\S* rhost=<HOST>(\s+user=\S*)?\s*$
^%(__prefix_line)s(pop3|imap)-login: (Info: )?(Aborted login|Disconnected)(: Inactivity)? \((no auth attempts|auth failed, \d+ attempts|tried to use disabled \S+ auth)\):( user=<\S+>,)?( method=\S+,)? rip=<HOST>, lip=(\d{1,3}\.){3}\d{1,3},( TLS( handshaking)?(: Disconnected)?)?\s*$
# Option: ignoreregex
# Notes.: regex to ignore. If this regex matches, the line is ignored.

9
testcases/files/logs/dovecot
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@ -3,6 +3,13 @@
@e040c6d8a3bfa62d358083300119c259cd44dcd0 dovecot-auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=web rhost=176.61.140.224
# Above example with injected rhost into ruser -- should not match for 1.2.3.4
@e040c6d8a3bfa62d358083300119c259cd44dcd0 dovecot-auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=rhost=1.2.3.4 rhost=192.0.43.10
@e040c6d8a3bfa62d358083300119c259cd44dcd0 dovecot-auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=root rhost=176.61.140.224 user=root
@e040c6d8a3bfa62d358083300119c259cd44dcd0 dovecot-auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=root rhost=176.61.140.225 user=root
Dec 12 11:19:11 dunnart dovecot: pop3-login: Aborted login (tried to use disabled plaintext auth): rip=190.210.136.21, lip=113.212.99.193
Jun 13 16:30:54 platypus dovecot: imap-login: Disconnected (auth failed, 2 attempts): user=<username.bob>, method=PLAIN, rip=49.176.98.87, lip=113.212.99.194, TLS
Jun 14 00:48:21 platypus dovecot: imap-login: Disconnected (auth failed, 1 attempts): method=PLAIN, rip=59.167.242.100, lip=113.212.99.194, TLS: Disconnected
Jun 13 20:48:11 platypus dovecot: pop3-login: Disconnected (no auth attempts): rip=121.44.24.254, lip=113.212.99.194, TLS: Disconnected
Jun 13 21:48:06 platypus dovecot: pop3-login: Disconnected: Inactivity (no auth attempts): rip=180.200.180.81, lip=113.212.99.194, TLS
Jun 13 20:20:21 platypus dovecot: imap-login: Disconnected (no auth attempts): rip=180.189.168.166, lip=113.212.99.194, TLS handshaking: Disconnected