mirror of https://github.com/fail2ban/fail2ban
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
41 lines
2.1 KiB
41 lines
2.1 KiB
# Fail2Ban filter to block web requests on a long or suspicious nature
|
|
#
|
|
|
|
[INCLUDES]
|
|
|
|
# overwrite with apache-common.local if _apache_error_client is incorrect.
|
|
before = apache-common.conf
|
|
|
|
[Definition]
|
|
|
|
failregex = ^%(_apache_error_client)s (?:(?:AH0013[456]: )?Invalid (method|URI) in request\b|(?:AH00565: )?request failed: URI too long \(longer than \d+\)|request failed: erroneous characters after protocol string:|(?:AH00566: )?request failed: invalid characters in URI\b)
|
|
|
|
ignoreregex =
|
|
|
|
# DEV Notes:
|
|
#
|
|
# [sebres] Because this apache-log could contain very long URLs (and/or referrer),
|
|
# the parsing of it anchored way may be very vulnerable (at least as regards
|
|
# the system resources, see gh-1790). Thus rewritten without end-anchor ($).
|
|
#
|
|
# fgrep -r 'URI too long' httpd-2.*
|
|
# httpd-2.2.25/server/protocol.c: "request failed: URI too long (longer than %d)", r->server->limit_req_line);
|
|
# httpd-2.4.4/server/protocol.c: "request failed: URI too long (longer than %d)",
|
|
#
|
|
# fgrep -r 'in request' ../httpd-2.* | fgrep Invalid
|
|
# httpd-2.2.25/server/core.c: "Invalid URI in request %s", r->the_request);
|
|
# httpd-2.2.25/server/core.c: "Invalid method in request %s", r->the_request);
|
|
# httpd-2.2.25/docs/manual/rewrite/flags.html.fr:avertissements 'Invalid URI in request'.
|
|
# httpd-2.4.4/server/core.c: "Invalid URI in request %s", r->the_request);
|
|
# httpd-2.4.4/server/core.c: "Invalid method in request %s - possible attempt to establish SSL connection on non-SSL port", r->the_request);
|
|
# httpd-2.4.4/server/core.c: "Invalid method in request %s", r->the_request);
|
|
#
|
|
# fgrep -r 'invalid characters in URI' httpd-2.*
|
|
# httpd-2.4.4/server/protocol.c: "request failed: invalid characters in URI");
|
|
#
|
|
# http://svn.apache.org/viewvc/httpd/httpd/trunk/server/core.c?r1=739382&r2=739620&pathrev=739620
|
|
# ...possible attempt to establish SSL connection on non-SSL port
|
|
#
|
|
# https://wiki.apache.org/httpd/ListOfErrors
|
|
# Author: Tim Connors
|