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Fix ASSP filter to work with current release of ASSP 

ASSP V1 development stopped at the end of 2014 and it is now deprecated.
All users were urged to upgrade to ASSP V2 which is still actively
developed. For some reason fail2ban 0.9.5 (and trunk) still have code
which only understands ASSP V1 logs. This means the filter ignores brute
force attacks against ASSP.
Now updated with anchored patterns tested against 6 months of log data.
pull/1494/head
rhardy613 2016-08-05 17:26:47 -04:00
parent f73746d846
commit 890a3dcbb9
2 changed files with 27 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
config/filter.d/assp.conf
View File

@ -7,18 +7,25 @@
[Definition]
failregex = <HOST> \<\S+@\S+\.\S+\> to: \S+@\S+\.\S+ relay attempt blocked for: \S+$
<HOST> \[SMTP Error\] 535 5\.7\.8 Error: authentication failed.*$
failregex = ^\s*(?:[m0-9\-]+\s+)*(?:\[\S+\]\s+)*<HOST> (?:\<\S+@\S+\.\S+\> )*(?:to: \S+@\S+\.\S+ )*relay attempt blocked for(?: \(parsing\))*: \S+$
^\s*(?:[m0-9\-]+\s+)*(?:\[\S+\]\s+)*<HOST> \[SMTP Error\] 535 5\.7\.8 Error: authentication failed:\s+(?:\S+|Connection lost to authentication server|Invalid authentication mechanism|Invalid base64 data in continued response)*$
ignoreregex =
# DEV Notes:
#
# Examples:
# Jul-29-16 16:49:52 m1-25391-06124 [Worker_1] [TLS-out] [RelayAttempt] 0.0.0.0 <user@example.com> to: user@example.org relay attempt blocked for: someone@example.org
# Jul-30-16 16:59:42 [Worker_1] [TLS-out] 0.0.0.0 [SMTP Error] 535 5.7.8 Error: authentication failed: UGFzc3dvcmQ6
# Jul-30-16 00:15:36 m1-52131-09651 [Worker_1] [TLS-out] 0.0.0.0 [SMTP Error] 535 5.7.8 Error: authentication failed: UGFzc3dvcmQ6
# Jul-31-16 06:45:59 [Worker_1] [TLS-in] [TLS-out] 0.0.0.0 [SMTP Error] 535 5.7.8 Error: authentication failed:
# Examples matches:
# Jul-29-16 16:49:52 m1-25391-06124 [Worker_1] [TLS-out] [RelayAttempt] 0.0.0.0 <user@example.com> to: user@example.org relay attempt blocked for: someone@example.org
# Jul-30-16 16:59:42 [Worker_1] [TLS-out] 0.0.0.0 [SMTP Error] 535 5.7.8 Error: authentication failed: UGFzc3dvcmQ6
# Jul-30-16 00:15:36 m1-52131-09651 [Worker_1] [TLS-out] 0.0.0.0 [SMTP Error] 535 5.7.8 Error: authentication failed: UGFzc3dvcmQ6
# Jul-31-16 06:45:59 [Worker_1] [TLS-in] [TLS-out] 0.0.0.0 [SMTP Error] 535 5.7.8 Error: authentication failed:
# Jan-05-16 08:38:49 m1-01129-09140 [Worker_1] [TLS-in] [TLS-out] [RelayAttempt] 0.0.0.0 <user@example.com> relay attempt blocked for (parsing): <user2@example>
# Jun-12-16 16:43:37 m1-64217-12013 [Worker_1] [TLS-in] [TLS-out] [RelayAttempt] 0.0.0.0 <user@example.com> to: user2@example.com relay attempt blocked for (parsing): <a.notheruser69@example.c>
# Jan-22-16 22:25:51 [Worker_1] [TLS-out] 0.0.0.0 [SMTP Error] 535 5.7.8 Error: authentication failed: Invalid authentication mechanism
# Mar-19-16 13:42:20 [Worker_1] [TLS-out] 0.0.0.0 [SMTP Error] 535 5.7.8 Error: authentication failed: Invalid base64 data in continued response
# Jul-18-16 16:54:21 [Worker_2] [TLS-out] 0.0.0.0 [SMTP Error] 535 5.7.8 Error: authentication failed: Connection lost to authentication server
# Jul-18-16 17:14:23 m1-76453-02949 [Worker_1] [TLS-out] 0.0.0.0 [SMTP Error] 535 5.7.8 Error: authentication failed: Connection lost to authentication server
#
# Author: Enrico Labedzki (enrico.labedzki@deiwos.de)
# Updated: Robert Hardy (rhardy@webcon.ca)

14
fail2ban/tests/files/logs/assp
View File

@ -5,4 +5,16 @@ Jul-30-16 17:07:25 [Worker_1] [TLS-out] 0.0.0.0 [SMTP Error] 535 5.7.8 Error: au
# failJSON: { "time": "2016-07-30T17:11:05", "match": true , "host": "0.0.0.0" }
Jul-30-16 17:11:05 m1-13060-05386 [Worker_1] [TLS-out] 0.0.0.0 [SMTP Error] 535 5.7.8 Error: authentication failed: UGFzc3dvcmQ6
# failJSON: { "time": "2016-07-31T06:45:59", "match": true , "host": "0.0.0.0" }
Jul-31-16 06:45:59 [Worker_1] [TLS-in] [TLS-out] 0.0.0.0 [SMTP Error] 535 5.7.8 Error: authentication failed:
Jul-31-16 06:45:59 [Worker_1] [TLS-in] [TLS-out] 0.0.0.0 [SMTP Error] 535 5.7.8 Error: authentication failed:
# failJSON: { "time": "2016-01-05T08:38:49", "match": true , "host": "0.0.0.0" }
Jan-05-16 08:38:49 m1-01129-09140 [Worker_1] [TLS-in] [TLS-out] [RelayAttempt] 0.0.0.0 <user@example.com> relay attempt blocked for (parsing): <user2@example>
# failJSON: { "time": "2016-06-12T16:43:37", "match": true , "host": "0.0.0.0" }
Jun-12-16 16:43:37 m1-64217-12013 [Worker_1] [TLS-in] [TLS-out] [RelayAttempt] 0.0.0.0 <user@example.com> to: user2@example.com relay attempt blocked for (parsing): <a.notheruser69@example.c>
# failJSON: { "time": "2016-01-22T22:25:51", "match": true , "host": "0.0.0.0" }
Jan-22-16 22:25:51 [Worker_1] [TLS-out] 0.0.0.0 [SMTP Error] 535 5.7.8 Error: authentication failed: Invalid authentication mechanism
# failJSON: { "time": "2016-03-19T13:42:20", "match": true , "host": "0.0.0.0" }
Mar-19-16 13:42:20 [Worker_1] [TLS-out] 0.0.0.0 [SMTP Error] 535 5.7.8 Error: authentication failed: Invalid base64 data in continued response
# failJSON: { "time": "2016-07-18T16:54:21", "match": true , "host": "0.0.0.0" }
Jul-18-16 16:54:21 [Worker_2] [TLS-out] 0.0.0.0 [SMTP Error] 535 5.7.8 Error: authentication failed: Connection lost to authentication server
# failJSON: { "time": "2016-07-18T17:14:23", "match": true , "host": "0.0.0.0" }
Jul-18-16 17:14:23 m1-76453-02949 [Worker_1] [TLS-out] 0.0.0.0 [SMTP Error] 535 5.7.8 Error: authentication failed: Connection lost to authentication server