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# SpamAssassin rules file: URI tests
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# Please don't modify this file as your changes will be overwritten with
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# the next update. Use @@LOCAL_RULES_DIR@@/local.cf instead.
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# See 'perldoc Mail::SpamAssassin::Conf' for details.
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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership.
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# The ASF licenses this file to you under the Apache License, Version 2.0
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# (the "License"); you may not use this file except in compliance with
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# the License. You may obtain a copy of the License at:
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# http://www.apache.org/licenses/LICENSE-2.0
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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###########################################################################
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require_version @@VERSION@@
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# possible IDN spoofing attack: http://www.shmoo.com/idn/homograph.txt
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# not expecting any hits on this (yet)
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uri HIGH_CODEPAGE_URI /^https?:\/\/[^\/]*\&\#(?:\d{4,}|[3456789]\d\d);/i
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tflags HIGH_CODEPAGE_URI userconf
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###########################################################################
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# Redirector URI patterns
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redirector_pattern /^http:\/\/chkpt\.zdnet\.com\/chkpt\/\w+\/(.*)$/i
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redirector_pattern /^http:\/\/www(?:\d+)?\.nate\.com\/r\/\w+\/(.*)$/i
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redirector_pattern /^http:\/\/.+\.gov\/(?:.*\/)?externalLink\.jhtml\?.*url=(.*?)(?:&.*)?$/i
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redirector_pattern /^http:\/\/redir\.internet\.com\/.+?\/.+?\/(.*)$/i
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redirector_pattern /^http:\/\/(?:.*?\.)?adtech\.de\/.*(?:;|\|)link=(.*?)(?:;|$)/i
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redirector_pattern m'^http.*?/redirect\.php\?.*(?<=[?&])goto=(.*?)(?:$|[&\#])'i
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redirector_pattern m'^https?:/*(?:[^/]+\.)?emf\d\.com/r\.cfm.*?&r=(.*)'i
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uri NUMERIC_HTTP_ADDR /^https?\:\/\/\d{7}/is
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describe NUMERIC_HTTP_ADDR Uses a numeric IP address in URL
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# Have gotten FPs off this, and whitespace can't be in the host, so...
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# % Visit my homepage: http://i.like.foo.com %
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uri HTTP_ESCAPED_HOST /^https?\:\/\/[^\/\s\?\']*%[0-9a-fA-F][0-9a-fA-F]/
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describe HTTP_ESCAPED_HOST Uses %-escapes inside a URL's hostname
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# look for URI with escaped 0-9, A-Z, or a-z characters (all other safe
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# characters have been well-tested, but are sometimes unnecessarily escaped
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# in nonspam; requiring "http" or "https" also reduces false positives).
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uri HTTP_EXCESSIVE_ESCAPES /^https?:\/\/\S*%(?:3\d|[46][1-9a-f]|[57][\da])/i
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describe HTTP_EXCESSIVE_ESCAPES Completely unnecessary %-escapes inside a URL
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uri IP_LINK_PLUS m{^https?://\d+\.\d+\.\d+\.\d+.{0,20}(?:cgi|click|ads|id=)}i
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describe IP_LINK_PLUS Dotted-decimal IP address followed by CGI
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# allow ports 80 and 443 which are http and https, respectively
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# we don't want to hit http://www.cnn.com:USArticle1840@www.liquidshirts.com/
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# though, which actually doesn't have a weird port in it.
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uri WEIRD_PORT m{https?://[^/\s]+?:\d+(?<!:80)(?<!:443)(?<!:8080)(?:/|\s|$)}
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describe WEIRD_PORT Uses non-standard port number for HTTP
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# Pretty good for most folks, except for jm: I have a really stupid
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# e-commerce bunch obfuscating their URLs with this for some reason. screw 'em
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# jm: hesitant to remove this outright; it should be good against phishers
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#uri HTTP_ENTITIES_HOST m{https?://[^\s\">/]*\&\#[\da-f]+}i
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#describe HTTP_ENTITIES_HOST URI obscured with character entities
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uri YAHOO_RD_REDIR m{^https?\://rd\.yahoo\.com/(?:[0-9]{4}|partner\b|dir\b)}i
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describe YAHOO_RD_REDIR Has Yahoo Redirect URI
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uri YAHOO_DRS_REDIR m{^https?://drs\.yahoo\.com/}i
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describe YAHOO_DRS_REDIR Has Yahoo Redirect URI
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# "www" hidden as "%77%77%77", "ww%77", etc.
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# note: *not* anchored to start of string, to catch use of redirectors
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uri HTTP_77 /http:\/\/.{0,2}\%77/
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describe HTTP_77 Contains an URL-encoded hostname (HTTP77)
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uri SPOOF_COM2OTH m{^https?://(?:\w+\.)+?com\.(?:\w+\.){2}}i
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describe SPOOF_COM2OTH URI contains ".com" in middle
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uri SPOOF_COM2COM m{^https?://(?:\w+\.)+?com\.(?:\w+\.)+?com}i
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describe SPOOF_COM2COM URI contains ".com" in middle and end
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uri SPOOF_NET2COM m{^https?://(?:\w+\.)+?(?:net|org)\.(?:\w+\.)+?com}i
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describe SPOOF_NET2COM URI contains ".net" or ".org", then ".com"
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uri URI_HEX m%^https?://[^/?]*\b[0-9a-f]{6,}\b%i
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describe URI_HEX URI hostname has long hexadecimal sequence
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uri URI_NOVOWEL m%^https?://[^/?]*[bcdfghjklmnpqrstvwxz]{7}%i
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describe URI_NOVOWEL URI hostname has long non-vowel sequence
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uri URI_UNSUBSCRIBE /\b(?:gone|opened|out)\.php/i
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describe URI_UNSUBSCRIBE URI contains suspicious unsubscribe link
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# bug 3896: URIs in various TLDs, other than 3rd level www
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uri URI_NO_WWW_INFO_CGI /^(?:https?:\/\/)?[^\/]+(?<!\/www)\.[^.]{7,}\.info\/(?=\S{15,})\S*\?/i
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describe URI_NO_WWW_INFO_CGI CGI in .info TLD other than third-level "www"
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uri URI_NO_WWW_BIZ_CGI /^(?:https?:\/\/)?[^\/]+(?<!\/www)\.[^.]{7,}\.biz\/(?=\S{15,})\S*\?/i
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describe URI_NO_WWW_BIZ_CGI CGI in .biz TLD other than third-level "www"
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###########################################################################
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uri NORMAL_HTTP_TO_IP m{^https?://\d+\.\d+\.\d+\.\d+}i
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describe NORMAL_HTTP_TO_IP Uses a dotted-decimal IP address in URL
added
removed
rules/20_uri_tests.cf
