Filter fail2ban khusus untuk upaya bruteforce phpMyadmin

9

Dalam pencarian saya untuk memblokir phpMyAdminupaya login gagal yang berlebihan dengan fail2ban, saya telah membuat skrip yang mencatat upaya yang gagal untuk file:/var/log/phpmyadmin_auth.log

Log khusus

Format /var/log/phpmyadmin_auth.logfile adalah:

phpMyadmin login failed with username: root; ip: 192.168.1.50; url: http://somedomain.com/phpmyadmin/index.php
phpMyadmin login failed with username: ; ip: 192.168.1.50; url: http://192.168.1.48/phpmyadmin/index.php

Filter khusus

[Definition]

# Count all bans in the logfile
failregex = phpMyadmin login failed with username: .*; ip: <HOST>;

Penjara phpMyAdmin

[phpmyadmin]

enabled  = true
port    = http,https
filter   = phpmyadmin
action   = sendmail-whois[name=HTTP]
logpath  = /var/log/phpmyadmin_auth.log
maxretry = 6

The fail2banlog berisi:

2012-10-04 10:52:22,756 fail2ban.server : INFO   Stopping all jails
2012-10-04 10:52:23,091 fail2ban.jail   : INFO   Jail 'ssh-iptables' stopped
2012-10-04 10:52:23,866 fail2ban.jail   : INFO   Jail 'fail2ban' stopped
2012-10-04 10:52:23,994 fail2ban.jail   : INFO   Jail 'ssh' stopped
2012-10-04 10:52:23,994 fail2ban.server : INFO   Exiting Fail2ban
2012-10-04 10:52:24,253 fail2ban.server : INFO   Changed logging target to /var/log/fail2ban.log for Fail2ban v0.8.6
2012-10-04 10:52:24,253 fail2ban.jail   : INFO   Creating new jail 'ssh'
2012-10-04 10:52:24,253 fail2ban.jail   : INFO   Jail 'ssh' uses poller
2012-10-04 10:52:24,260 fail2ban.filter : INFO   Added logfile = /var/log/auth.log
2012-10-04 10:52:24,260 fail2ban.filter : INFO   Set maxRetry = 6
2012-10-04 10:52:24,261 fail2ban.filter : INFO   Set findtime = 600
2012-10-04 10:52:24,261 fail2ban.actions: INFO   Set banTime = 600
2012-10-04 10:52:24,279 fail2ban.jail   : INFO   Creating new jail 'ssh-iptables'
2012-10-04 10:52:24,279 fail2ban.jail   : INFO   Jail 'ssh-iptables' uses poller
2012-10-04 10:52:24,279 fail2ban.filter : INFO   Added logfile = /var/log/auth.log
2012-10-04 10:52:24,280 fail2ban.filter : INFO   Set maxRetry = 5
2012-10-04 10:52:24,280 fail2ban.filter : INFO   Set findtime = 600
2012-10-04 10:52:24,280 fail2ban.actions: INFO   Set banTime = 600
2012-10-04 10:52:24,287 fail2ban.jail   : INFO   Creating new jail 'fail2ban'
2012-10-04 10:52:24,287 fail2ban.jail   : INFO   Jail 'fail2ban' uses poller
2012-10-04 10:52:24,287 fail2ban.filter : INFO   Added logfile = /var/log/fail2ban.log
2012-10-04 10:52:24,287 fail2ban.filter : INFO   Set maxRetry = 3
2012-10-04 10:52:24,288 fail2ban.filter : INFO   Set findtime = 604800
2012-10-04 10:52:24,288 fail2ban.actions: INFO   Set banTime = 604800
2012-10-04 10:52:24,292 fail2ban.jail   : INFO   Jail 'ssh' started
2012-10-04 10:52:24,293 fail2ban.jail   : INFO   Jail 'ssh-iptables' started
2012-10-04 10:52:24,297 fail2ban.jail   : INFO   Jail 'fail2ban' started

Ketika saya menerbitkan:

sudo service fail2ban restart

fail2banemail yang ingin saya sampaikan sshtelah dimulai kembali, tetapi saya tidak menerima email semacam itu tentang phpmyadminpenjara saya . Login gagal berulang phpMyAdmintidak menyebabkan email dikirim.

Apakah saya melewatkan beberapa pengaturan kritis? Apakah ekspresi reguler filter saya salah?

Perbarui: menambahkan perubahan dari instalasi default

Dimulai dengan fail2baninstalasi yang bersih :

cp /etc/fail2ban/jail.conf /etc/fail2ban/jail.local

Ubah alamat email menjadi milik saya, tindakan ke:

action = %(action_mwl)s

Tambahkan yang berikut ke jail.local

[phpmyadmin]

enabled  = true
port     = http,https
filter   = phpmyadmin
action   = sendmail-whois[name=HTTP]
logpath  = /var/log/phpmyadmin_auth.log
maxretry = 4

Tambahkan yang berikut ke /etc/fail2ban/filter.d/phpmyadmin.conf

# phpmyadmin configuration file
#
# Author: Michael Robinson
#

[Definition]

# 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>\S+)
# Values:  TEXT
#

# Count all bans in the logfile
failregex = phpMyadmin login failed with username: .*; ip: <HOST>;

# Option:  ignoreregex
# Notes.:  regex to ignore. If this regex matches, the line is ignored.
# Values:  TEXT
#

# Ignore our own bans, to keep our counts exact.
# In your config, name your jail 'fail2ban', or change this line!
ignoreregex =

Mengulang kembali fail2ban

sudo service fail2ban restart

PS: Saya suka telur

security  configuration  fail2ban 
— Michael Robinson
sumber
1
Tampaknya tidak mengambil jail baru Anda di konfigurasi. Silakan tentukan dengan pasti file mana yang Anda ubah.
— mgorven
@mgorven Saya telah memperbarui pertanyaan saya dengan tinjauan umum yang komprehensif tentang apa yang saya ubah
— Michael Robinson
Apakah ini upaya login yang sebenarnya ke instance phpmyadmin Anda atau hanya pemindai yang mencari phpmyadmin?
— Scott Pack
Saya percaya mereka yang terakhir
— Michael Robinson

Jawaban:

8

Itu bagus tapi mengapa tidak menggunakan fungsi apache untuk login gagal login?

Tambahkan baris ini ke Apache Config Anda (yaitu: /etc/apache2/conf.d/phpmyadmin.conf) di Bagian VirtualHost yang sesuai:

LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\" %{userID}n %{userStatus}n" pma_combined
CustomLog /var/log/apache2/phpmyadmin_access.log pma_combined

Kemudian buat filter fail2ban:

/etc/fail2ban/filter.d/phpmyadmin.conf

[Definition]
denied = mysql-denied|allow-denied|root-denied|empty-denied
failregex = ^<HOST> -.*(?:%(denied)s)$
ignoreregex =

Sekarang tambahkan jail ke /etc/fail2ban/jail.local

[phpmyadmin]
enabled = true
port = http,https
filter = phpmyadmin
logpath = /var/log/apache2/phpmyadmin_access.log

Mulai ulang apache dan fail2ban:

service  apache2 reload
service fail2ban reload

dan Anda selesai, tidak perlu skrip php seterusnya ..

— spacebiker
sumber
3
Harap jangan mengedit secara langsung jail.conf, buat salinannyajail.local
— NineCattoRules
Anda benar @Simone, saya mengubah jawaban saya, terima kasih
— spacebiker
Saya mengalami masalah dengan solusinya. Silakan lihat: serverfault.com/questions/815396/…
2

  1. Anda harus mengubah skrip Anda untuk memasukkan stempel waktu dalam file log. Tanpa ini, fail2ban tidak akan berfungsi

  2. gunakan fail2ban-regex /var/log/phpmyadmin_auth.log /etc/fail2ban/filter.d/phpmyadmin.confuntuk memverifikasi regex Anda terlebih dahulu.

  3. Saya dapat memulai fail2ban dengan sukses menggunakan konfigurasi asli Anda (sebelum jail.local)

    Oct  7 00:42:07 hostname yum: Installed: python-inotify-0.9.1-1.el5.noarch 
Oct  7 00:42:08 hostname yum: Installed: fail2ban-0.8.4-29.el5.noarch
Oct  7 00:42:10 hostname yum: Installed: phpMyAdmin-2.11.11.3-2.el5.noarch
Oct  7 01:01:03 hostname fail2ban.server : INFO   Changed logging target to SYSLOG for Fail2ban v0.8.4
Oct  7 01:01:03 hostname fail2ban.jail   : INFO   Creating new jail 'phpmyadmin'
Oct  7 01:01:03 hostname fail2ban.jail   : INFO   Jail 'phpmyadmin' uses Gamin
Oct  7 01:01:03 hostname fail2ban.filter : INFO   Set maxRetry = 2
Oct  7 01:01:03 hostname fail2ban.filter : INFO   Set findtime = 600
Oct  7 01:01:03 hostname fail2ban.actions: INFO   Set banTime = 600
Oct  7 01:01:03 hostname fail2ban.jail   : INFO   Creating new jail 'ssh-iptables'
Oct  7 01:01:03 hostname fail2ban.jail   : INFO   Jail 'ssh-iptables' uses Gamin
Oct  7 01:01:03 hostname fail2ban.filter : INFO   Added logfile = /var/log/secure
Oct  7 01:01:03 hostname fail2ban.filter : INFO   Set maxRetry = 5
Oct  7 01:01:03 hostname fail2ban.filter : INFO   Set findtime = 600
Oct  7 01:01:03 hostname fail2ban.actions: INFO   Set banTime = 600
Oct  7 01:01:03 hostname fail2ban.jail   : INFO   Jail 'phpmyadmin' started
Oct  7 01:01:03 hostname fail2ban.jail   : INFO   Jail 'ssh-iptables' started
Oct  7 01:10:54 hostname fail2ban.jail   : INFO   Jail 'phpmyadmin' stopped
Oct  7 01:10:55 hostname fail2ban.jail   : INFO   Jail 'ssh-iptables' stopped
Oct  7 01:10:55 hostname fail2ban.server : INFO   Exiting Fail2ban
Oct  7 01:10:56 hostname fail2ban.server : INFO   Changed logging target to SYSLOG for Fail2ban v0.8.4
Oct  7 01:10:56 hostname fail2ban.jail   : INFO   Creating new jail 'phpmyadmin'
Oct  7 01:10:56 hostname fail2ban.jail   : INFO   Jail 'phpmyadmin' uses Gamin
Oct  7 01:10:56 hostname fail2ban.filter : INFO   Added logfile = /var/log/phpmyadmin_auth.log

  4. Setelah regex yang benar ada, Anda dapat menggunakan audit untuk melihat apakah file Anda diakses atau tidak oleh fail2ban.

Saya menggunakan auditctl -w /var/log/phpmyadmin_auth.log -p warx -k phpmyadmin_fail2ban

— Nehal Dattani
sumber
Saya mengalami masalah dengan solusinya, silakan lihat: serverfault.com/questions/815396/...
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