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51 lines
2.2 KiB
Plaintext
51 lines
2.2 KiB
Plaintext
# ---------------------------------------------------------------
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# Core ModSecurity Rule Set
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# Copyright (C) 2006 Breach Security Inc. All rights reserved.
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#
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# The ModSecuirty Core Rule Set is distributed under GPL version 2
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# Please see the enclosed LICENCE file for full details.
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# ---------------------------------------------------------------
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#
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# TODO in some cases a valid client (usually automated) generates requests that
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# violates the HTTP protocol. Create exceptions for those clients, but try
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# to limit the exception to a source IP or other additional properties of
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# the request such as URL and not allow the violation generally.
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#
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# Use status code 400 response status code by default as protocol violations
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# are in essence bad requests.
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SecDefaultAction "log,pass,phase:1,status:400"
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# Do not accept requests without common headers.
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#
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# Implies either an attacker or a legitimate automation client.
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#
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SecRule REQUEST_URI "^/$" "chain,skip:4"
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SecRule REMOTE_ADDR "^127\.0\.0\.1$" "chain"
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SecRule REQUEST_HEADERS:User-Agent "^Apache.*\(internal dummy connection\)$" "t:none"
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SecRule &REQUEST_HEADERS:Host "@eq 0" \
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"skip:1,log,auditlog,msg:'Request Missing a Host Header',id:'960008',severity:'4'"
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SecRule REQUEST_HEADERS:Host "^$" \
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"log,auditlog,msg:'Request Missing a Host Header',id:'960008',severity:'4'"
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SecRule &REQUEST_HEADERS:Accept "@eq 0" \
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"chain,skip:1,log,auditlog,msg:'Request Missing an Accept Header', severity:'2',id:'960015'"
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SecRule REQUEST_METHOD "!OPTIONS"
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SecRule REQUEST_HEADERS:Accept "^$" \
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"chain,log,auditlog,msg:'Request Missing an Accept Header', severity:'2',id:'960015'"
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SecRule REQUEST_METHOD "!OPTIONS"
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SecRule &REQUEST_HEADERS:User-Agent "@eq 0" \
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"skip:1,log,auditlog,msg:'Request Missing a User Agent Header',id:'960009',severity:'4'"
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SecRule REQUEST_HEADERS:User-Agent "^$" \
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"log,auditlog,msg:'Request Missing a User Agent Header',id:'960009',severity:'4'"
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# Check that the host header is not an IP address
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#
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SecRule REQUEST_HEADERS:Host "^[\d\.]+$" "deny,log,auditlog,status:400,msg:'Host header is a numeric IP address', severity:'2',id:'960017'"
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