diff --git a/ChangeLog b/ChangeLog index d386ceef..cb2959a5 100644 --- a/ChangeLog +++ b/ChangeLog @@ -45,6 +45,7 @@ ver. 1.0.1-dev-1 (20??/??/??) - development nightly edition - new options `kill-mode` and `kill` to drop established connections of intruder (see action for details, gh-3018) * `filter.d/nginx-http-auth.conf` - extended with parameter mode, so additionally to `auth` (or `normal`) mode `fallback` (or combined as `aggressive`) can find SSL errors while SSL handshaking, gh-2881 +* `filter.d/xrdp.conf` - new filter for XRDP, an open source RDP server ver. 0.11.2 (2020/11/23) - heal-the-world-with-security-tools diff --git a/config/filter.d/xrdp.conf b/config/filter.d/xrdp.conf new file mode 100644 index 00000000..c625b496 --- /dev/null +++ b/config/filter.d/xrdp.conf @@ -0,0 +1,34 @@ +# +# Fail2Ban filter for XRDP +# +# Detects login attempts with invalid credentials +# +# Requirements: +# - xrdp >= 0.9.19 +# - The log level in sesman.ini should be set to `INFO` or higher +# to emit the log messages needed for this filter. +# +# Author: Evan Linde +# + +[INCLUDES] + +# Read common prefixes. If any customizations available -- read them from +# common.local +before = common.conf + + +[DEFAULT] + +_daemon = xrdp-sesman + + +[Definition] + +authfail_re = \[INFO \] AUTHFAIL: user=.+ ip= time=\d+ + +failregex = ^%(__prefix_line)s%(authfail_re)s$ + +ignoreregex = + + diff --git a/config/jail.conf b/config/jail.conf index fe8db527..f04e8be7 100644 --- a/config/jail.conf +++ b/config/jail.conf @@ -978,3 +978,9 @@ banaction = %(banaction_allports)s [monitorix] port = 8080 logpath = /var/log/monitorix-httpd + + +[xrdp] +port = 3389 +logpath = /var/log/xrdp-sesman.log + diff --git a/fail2ban/tests/files/logs/xrdp b/fail2ban/tests/files/logs/xrdp new file mode 100644 index 00000000..1a9e8ee2 --- /dev/null +++ b/fail2ban/tests/files/logs/xrdp @@ -0,0 +1,37 @@ +# +# /var/log/xrdp-sesman.log -- should be about the same on any linux distro +# + +# failJSON: { "time": "2022-04-07T12:11:06", "match": true, "host": "10.171.161.151"} +[20220407-12:11:06] [INFO ] AUTHFAIL: user=badtypist ip=::ffff:10.171.161.151 time=1649351466 + +# ip injection: 10.171.161.151 should be matched as the host; 192.168.0.1 is an innocent, injected address +# failJSON: { "time": "2022-04-07T12:11:24", "match": true, "host": "10.171.161.151", "desc": "specifying ip address as username"} +[20220407-12:11:24] [INFO ] AUTHFAIL: user=192.168.0.1 ip=::ffff:10.171.161.151 time=1649351484 + +# ip injection: 10.171.161.151 should be matched as the host; 192.168.0.4 is an innocent, injected address +# failJSON: { "time": "2022-04-07T12:22:02", "match": true, "host": "10.171.161.151", "desc": "more devious log injection"} +[20220407-12:22:02] [INFO ] AUTHFAIL: user=loginjector ip=192.168.0.4 time=123456789\n[20220407-12:16:59] [INFO ] AUTHFAIL: user=endinjection ip=::ffff:10.171.161.151 time=1649352122 + + +# +# /var/log/messages -- RHEL/Fedora family +# + +# failJSON: { "time": "2005-04-07T12:11:06", "match": true, "host": "10.171.161.151"} +Apr 7 12:11:06 servername xrdp-sesman[41441]: [INFO ] AUTHFAIL: user=badtypist ip=::ffff:10.171.161.151 time=1649351466 + +# ip injection: 10.171.161.151 should be matched as the host; 192.168.0.1 is an innocent, injected address +# failJSON: { "time": "2005-04-07T12:11:24", "match": true, "host": "10.171.161.151", "desc": "specifying ip address as username"} +Apr 7 12:11:24 servername xrdp-sesman[41441]: [INFO ] AUTHFAIL: user=192.168.0.1 ip=::ffff:10.171.161.151 time=1649351484 + +# ip injection: 10.171.161.151 should be matched as the host; 192.168.0.4 is an innocent, injected address +# failJSON: { "time": "2005-04-07T12:22:02", "match": true, "host": "10.171.161.151", "desc": "more devious log injection"} +Apr 7 12:22:02 servername xrdp-sesman[41441]: [INFO ] AUTHFAIL: user=loginjector ip=192.168.0.4 time=123456789\n[20220407-12:16:59] [INFO ] AUTHFAIL: user=endinjection ip=::ffff:10.171.161.151 time=1649352122 + +# ip injection: innocent, injected ip 192.168.0.4 in a line that shouldn't contain a host +# failJSON: { "match": false } +Apr 7 12:22:02 servername xrdp[52415]: [INFO ] xrdp_wm_log_msg: login failed for user loginjector ip=192.168.0.4 time=12345\n[20220407-12:16:59] [INFO ] AUTHFAIL: user=endinjection + +# failJSON: { "match": false } +Apr 7 12:22:02 servername xrdp[52415]: [INFO ] n[20220407-12:16:59] [INFO ] AUTHFAIL: user=endinjection