diff --git a/config/filter.d/apache-shellshock.conf b/config/filter.d/apache-shellshock.conf new file mode 100644 index 00000000..39df1704 --- /dev/null +++ b/config/filter.d/apache-shellshock.conf @@ -0,0 +1,26 @@ +# Fail2Ban filter to block web requests containing custom headers attempting to exploit the shellshock bug +# +# + +[INCLUDES] + +# overwrite with apache-common.local if _apache_error_client is incorrect. +before = apache-common.conf + +[Definition] + +failregex = ^%(_apache_error_client)s (AH01215: )?/bin/(ba)?sh: warning: HTTP_.*?: ignoring function definition attempt(, referer: \S+)?\s*$ + ^%(_apache_error_client)s (AH01215: )?/bin/(ba)?sh: error importing function definition for `HTTP_.*?'(, referer: \S+)?\s*$ + +ignoreregex = + + +# DEV Notes: +# +# https://wiki.apache.org/httpd/ListOfErrors for apache error IDs +# +# example log lines: +# [Thu Sep 25 09:27:18.813902 2014] [cgi:error] [pid 16860] [client 89.207.132.76:59635] AH01215: /bin/bash: warning: HTTP_TEST: ignoring function definition attempt +# [Thu Sep 25 09:29:56.141832 2014] [cgi:error] [pid 16864] [client 162.247.73.206:41273] AH01215: /bin/bash: error importing function definition for `HTTP_TEST' +# +# Author: Eugene Hopkinson (riot@riot.so)