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ENH: proftp regex hardening and log messages

pull/252/head
Daniel Black 2013-06-13 22:11:05 +10:00
parent 460e09af66
commit 4c67a269bf
3 changed files with 17 additions and 5 deletions
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2
ChangeLog
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@ -15,6 +15,8 @@ ver. 0.8.11 (2013/XX/XXX) - wanna-be-released
- New Features:
- Enhancements:
Daniel Black
* filter.d/proftpd -- harden and anchor regex and add two testcases
ver. 0.8.10 (2013/06/12) - wanna-be-secure

17
config/filter.d/proftpd.conf
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@ -1,8 +1,15 @@
# Fail2Ban configuration file
#
# Author: Yaroslav Halchenko
# Daniel Black - hardening of regex
#
#
[INCLUDES]
# Read common prefixes. If any customizations available -- read them from
# common.local
before = common.conf
[Definition]
@ -13,10 +20,10 @@
# (?:::f{4,6}:)?(?P<host>[\w\-.^_]+)
# Values: TEXT
#
failregex = \(\S+\[<HOST>\]\)[: -]+ USER \S+: no such user found from \S+ \[\S+\] to \S+:\S+ *$
\(\S+\[<HOST>\]\)[: -]+ USER \S+ \(Login failed\): .*$
\(\S+\[<HOST>\]\)[: -]+ SECURITY VIOLATION: \S+ login attempted\. *$
\(\S+\[<HOST>\]\)[: -]+ Maximum login attempts \(\d+\) exceeded *$
failregex = ^ %(__hostname)s %(__daemon_re)s%(__pid_re)s %(__hostname)s \(\S+\[<HOST>\]\)[: -]+ USER \S+: no such user found from \S+ \[\S+\] to \S+:\S+ *$
^ %(__hostname)s %(__daemon_re)s%(__pid_re)s %(__hostname)s \(\S+\[<HOST>\]\)[: -]+ USER \S+ \(Login failed\): .*$
^ %(__hostname)s %(__daemon_re)s%(__pid_re)s %(__hostname)s \(\S+\[<HOST>\]\)[: -]+ SECURITY VIOLATION: \S+ login attempted\. *$
^ %(__hostname)s %(__daemon_re)s%(__pid_re)s %(__hostname)s \(\S+\[<HOST>\]\)[: -]+ Maximum login attempts \(\d+\) exceeded *$
# Option: ignoreregex
# Notes.: regex to ignore. If this regex matches, the line is ignored.

3
testcases/files/logs/proftpd
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@ -1,5 +1,8 @@
Jan 10 00:00:00 myhost proftpd[12345] myhost.domain.com (123.123.123.123[123.123.123.123]): USER username (Login failed): User in /etc/ftpusers
Feb 1 00:00:00 myhost proftpd[12345] myhost.domain.com (123.123.123.123[123.123.123.123]): USER username: no such user found from 123.123.123.123 [123.123.123.123] to 234.234.234.234:21
Jun 09 07:30:58 platypus.ace-hosting.com.au proftpd[11864] platypus.ace-hosting.com.au (mail.bloodymonster.net[::ffff:67.227.224.66]): USER username (Login failed): Incorrect password.
Jun 09 11:15:43 platypus.ace-hosting.com.au proftpd[17424] platypus.ace-hosting.com.au (::ffff:101.71.143.238[::ffff:101.71.143.238]): USER god: no such user found from ::ffff:101.71.143.238 [::ffff:101.71.143.238] to ::ffff:123.212.99.194:21
Jun 13 22:07:23 platypus.ace-hosting.com.au proftpd[15719] platypus.ace-hosting.com.au (::ffff:59.167.242.100[::ffff:59.167.242.100]): SECURITY VIOLATION: root login attempted.