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

* 'exim' of https://github.com/grooverdan/fail2ban:
  DOC: credits/blame to me for changes to exim
  ENH: new exim filter regexs. Also note a begining PID in this format. Thanks to ftoppi for the log entries
  TST/ENH: Improve regex around exim
pull/271/head
Yaroslav Halchenko 2013-06-23 00:21:28 -04:00
parent 057f0ad135 25c3bbfc2f
commit b9e971c25d
4 changed files with 29 additions and 4 deletions
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2
ChangeLog
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@ -19,7 +19,7 @@ ver. 0.8.11 (2013/XX/XXX) - wanna-be-released
Daniel Black
* filter.d/{asterisk,assp,dovecot,proftpd}.conf -- regex hardening
and extra failure examples in sample logs
Daniel Black & Georgiy Mernov
Daniel Black & Georgiy Mernov & ftoppi
* filter.d/exim.conf -- regex hardening and extra failure examples in
sample logs
Yaroslav Halchenko

1
THANKS
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@ -18,6 +18,7 @@ Daniel Black
David Nutter
Eric Gerbier
Enrico Labedzki
ftoppi
Georgiy Mernov
Guillaume Delvit
Hanno 'Rince' Wagner

16
config/filter.d/exim.conf
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@ -1,7 +1,7 @@
# Fail2Ban configuration file
#
# Author: Cyril Jaquier
#
# Daniel Black (rewrote with strong regexs)
#
[Definition]
@ -13,8 +13,18 @@
# (?:::f{4,6}:)?(?P<host>[\w\-.^_]+)
# Values: TEXT
#
failregex = ^ H=\S+ \(\S+\) \[<HOST>\] sender verify fail for <\S+>: (?:rejected by local_scan|Unrouteable address)\s*$
^ login authenticator failed for (\S+ )?\(\S+\) \[<HOST>\]: 535 Incorrect authentication data( \(set_id=.*\)|: \d+ Time\(s\))?\s*$
# From exim source code: ./src/receive.c:add_host_info_for_log
host_info = H=([\w.-]+ )?(\(\S+\) )?\[<HOST>\](:\d+)? (?:I=\[\S+\]:\d+ )?(?:U=\S+ )?(P=e?smtp )?
pid = ( \[\d+\])?
failregex = ^%(pid)s %(host_info)ssender verify fail for <\S+>: Unrouteable address\s*$
^%(pid)s \S+ F=(?:<>|\S+@\S+) %(host_info)s(?:temporarily )?rejected by local_scan\(\): .{0,256}$
^%(pid)s login authenticator failed for (\S+ )?\(\S+\) \[<HOST>\]: 535 Incorrect authentication data( \(set_id=.*\)|: \d+ Time\(s\))?\s*$
^%(pid)s %(host_info)sF=(?:<>|[^@]+@\S+) rejected RCPT [^@]+@\S+: (rejected found in dnsbl \S+|relay not permitted)\s*$
^%(pid)s \S+ %(host_info)sF=(?:<>|[^@]+@\S+) rejected after DATA: This message contains a virus \(\S+\)\.\s*$
^%(pid)s SMTP protocol synchronization error \(.*\): rejected (connection from|"\S+") %(host_info)s(next )?input=".*"\s*$
^%(pid)s SMTP call from \S+ \[<HOST>\](:\d+)? (I=\[\S+\]:\d+ )?dropped: too many nonmail commands \(last was "\S+"\)\s*$
# Option: ignoreregex
# Notes.: regex to ignore. If this regex matches, the line is ignored.

14
testcases/files/logs/exim
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@ -4,3 +4,17 @@
2013-06-12 03:57:58 login authenticator failed for (ylmf-pc) [120.196.140.45]: 535 Incorrect authentication data: 1 Time(s)
2013-06-12 13:18:11 login authenticator failed for (USER-KVI9FGS9KP) [101.66.165.86]: 535 Incorrect authentication data
2013-06-10 10:10:59 H=ufficioestampa.it (srv.ufficioestampa.it) [193.169.56.211] sender verify fail for <user@example.com>: Unrouteable address
# http://forum.lissyara.su/viewtopic.php?f=20&t=2985
2010-11-24 21:48:41 1PLKOW-00046U-EW F=wvhluo@droolindog.com H=93-143-146-237.adsl.net.t-com.hr (droolindog.com) [93.143.146.237] I=[10.10.10.32]:25 P=esmtp temporarily rejected by local_scan(): Temporary local problem
# http://us.generation-nt.com/answer/exim-spamassassin-2010-0-x64-help-204020461.html
2011-07-07 15:44:16 1QexIu-0006dj-PX F=XXXXXX@XXXXXXXXXXXX H=localhost (saf.bio.caltech.edu) [127.0.0.1] P=esmtp temporarily rejected by local_scan(): Local configuration error - local_scan() library failure/usr/lib/exim/sa-exim.so: cannot open shared object file: No such file or directory
# http://www.clues.ltd.uk/howto/debian-sa-fprot-HOWTO.html
2004-01-18 07:15:35 1Ai79e-0000Dq-8i F=uzwltcmwto24@melissacam.biz H=lsanca1-ar3-4-47-028-040.lsanca1.elnk.dsl.genuity.net [4.47.28.40] P=smtp rejected by local_scan(): Rejected: hits=7.5 required=5.0 trigger=5.0
# https://github.com/fail2ban/fail2ban/pull/251#issuecomment-19493875
2013-06-15 11:19:33 [2249] H=([2.181.148.95]) [2.181.148.95]:52391 I=[1.2.3.4]:25 F=fantasizesg4@google.com rejected RCPT some@email.com: rejected found in dnsbl zen.spamhaus.org
2013-06-10 18:33:32 [10099] H=(yakult.com.tw) [202.132.70.178]:3755 I=[1.2.3.4]:25 F=menacedsj04@listserv.eurasia.org rejected RCPT dir@ml3.ru: relay not permitted
2013-06-09 10:21:28 [14127] 1UlasQ-0003fr-45 F=mcorporation4@aol.com H=(mail38.fssprus.ru) [46.254.240.82]:43671 I=[1.2.3.4]:25 P=esmtp rejected by local_scan(): Rejected
2013-06-15 11:20:36 [2516] 1Unmew-0000ea-SE H=egeftech.static.otenet.gr [83.235.177.148]:32706 I=[1.2.3.4]:25 F=auguriesvbd40@google.com rejected after DATA: This message contains a virus (Sanesecurity.Junk.39934.UNOFFICIAL).
2013-06-02 06:54:20 [13314] SMTP protocol synchronization error (input sent without waiting for greeting): rejected connection from H=[211.148.195.192]:25936 I=[1.2.3.4]:25 input="GET / HTTP/1.1\r\n\r\n"
2013-06-02 09:05:48 [18505] SMTP protocol synchronization error (next input sent too soon: pipelining was not advertised): rejected "RSET" H=ba77.mx83.fr [82.96.160.77]:58302 I=[1.2.3.4]:25 next input="QUIT\r\n"
2013-06-02 09:22:05 [19591] SMTP call from pc012-6201.spo.scu.edu.tw [163.14.21.161]:3767 I=[1.2.3.4]:25 dropped: too many nonmail commands (last was "RSET")