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MainRule

例子：

MainRule "str:--" "msg:mysql comment (--)" "mz:BODY|URL|ARGS|$HEADERS_VAR:Cookie" "s:$SQL:4" id:1007;

MainRule的匹配模式有:

str：字符串
rx：正则表达式
d:libinj_xss：libinjection检测为xss
d:libinj_sql：libinjection检测为sql注入

”str:--”，代表匹配 -- 这个字符。

"msg:mysql comment (--)" 用于描述规则。

"mz:BODY|URL|ARGS|$HEADERS_VAR:Cookie" 匹配区域Match Zones：

mz支持以下区域：

ARGS: GET args 参数
HEADERS：HTTP Headers
BODY： POST args (和 RAW_BODY)
URL：在?之前的URL

评分Score

"s:$SQL:2" 如果请求符合这条规则，那么名为$SQL的这个计数器就会加2；如果这个请求中有多个参数符合这条规则，那么计数器也会相应地增加。

当$SQL这个计数器符合在location中CheckRule对于$SQL计数器的定义时，将采取相对应的动作，如：

CheckRule "$SQL >= 8" BLOCK;

当计数器$SQL分数大于等于8，nginx将禁止访问。

最后是规则id，这id在编写白名单的时候会用到：

id:1002

BasicRule

白名单的添加最好能以日志为基础进行操作。如果你不想在配置Naxsi的时候导致服务无法访问，那么可以打开学习模式：

LearningMode;
SecRulesEnabled;
DeniedUrl "/RequestDenied";
CheckRule "$SQL >= 8" BLOCK;
CheckRule "$RFI >= 8" BLOCK;
CheckRule "$TRAVERSAL >= 4" BLOCK;
CheckRule "$EVADE >= 4" BLOCK;
CheckRule "$XSS >= 8" BLOCK;

以上的CheckRule意味着当名为$SQL、$RFI、$TRAVERSAL、$EVADE和$XSS这些计数器的值达到设定值后，将禁止访问。

动作包含：

DROP：抛弃请求，不做任何回应
BLOCK：根据DeniedUrl的设定进行跳转
ALLOW：允许通过
LOG：仅记录在日志中，不做任何动作

Naxsi 核心规则

##################################
## INTERNAL RULES IDS:1-999     ##
##################################
#@MainRule "msg:weird request, unable to parse" id:1;
#@MainRule "msg:request too big, stored on disk and not parsed" id:2;
#@MainRule "msg:invalid hex encoding, null bytes" id:10;
#@MainRule "msg:unknown content-type" id:11;
#@MainRule "msg:invalid formatted url" id:12;
#@MainRule "msg:invalid POST format" id:13;
#@MainRule "msg:invalid POST boundary" id:14;
#@MainRule "msg:invalid JSON" id:15;
#@MainRule "msg:empty POST" id:16;
#@MainRule "msg:libinjection_sql" id:17;
#@MainRule "msg:libinjection_xss" id:18;
#@MainRule "msg:no generic rules" id:19;
#@MainRule "msg:bad utf8" id:20;

##################################
## SQL Injections IDs:1000-1099 ##
##################################
MainRule "rx:select|union|update|delete|insert|table|from|ascii|hex|unhex|drop|load_file|substr|group_concat|dumpfile" "msg:sql keywords" "mz:BODY|URL|ARGS|$HEADERS_VAR:Cookie" "s:$SQL:4" id:1000;
MainRule "str:\"" "msg:double quote" "mz:BODY|URL|ARGS|$HEADERS_VAR:Cookie" "s:$SQL:8,$XSS:8" id:1001;
MainRule "str:0x" "msg:0x, possible hex encoding" "mz:BODY|URL|ARGS|$HEADERS_VAR:Cookie" "s:$SQL:2" id:1002;
## Hardcore rules
MainRule "str:/*" "msg:mysql comment (/*)" "mz:BODY|URL|ARGS|$HEADERS_VAR:Cookie" "s:$SQL:8" id:1003;
MainRule "str:*/" "msg:mysql comment (*/)" "mz:BODY|URL|ARGS|$HEADERS_VAR:Cookie" "s:$SQL:8" id:1004;
MainRule "str:|" "msg:mysql keyword (|)"  "mz:BODY|URL|ARGS|$HEADERS_VAR:Cookie" "s:$SQL:8" id:1005;
MainRule "str:&&" "msg:mysql keyword (&&)" "mz:BODY|URL|ARGS|$HEADERS_VAR:Cookie" "s:$SQL:8" id:1006;
## end of hardcore rules
MainRule "str:--" "msg:mysql comment (--)" "mz:BODY|URL|ARGS|$HEADERS_VAR:Cookie" "s:$SQL:4" id:1007;
MainRule "str:;" "msg:semicolon" "mz:BODY|URL|ARGS" "s:$SQL:4,$XSS:8" id:1008;
MainRule "str:=" "msg:equal sign in var, probable sql/xss" "mz:ARGS|BODY" "s:$SQL:2" id:1009;
MainRule "str:(" "msg:open parenthesis, probable sql/xss" "mz:ARGS|URL|BODY|$HEADERS_VAR:Cookie" "s:$SQL:4,$XSS:8" id:1010;
MainRule "str:)" "msg:close parenthesis, probable sql/xss" "mz:ARGS|URL|BODY|$HEADERS_VAR:Cookie" "s:$SQL:4,$XSS:8" id:1011;
MainRule "str:'" "msg:simple quote" "mz:ARGS|BODY|URL|$HEADERS_VAR:Cookie" "s:$SQL:4,$XSS:8" id:1013;
MainRule "str:," "msg:comma" "mz:BODY|URL|ARGS|$HEADERS_VAR:Cookie" "s:$SQL:4" id:1015;
MainRule "str:#" "msg:mysql comment (#)" "mz:BODY|URL|ARGS|$HEADERS_VAR:Cookie" "s:$SQL:4" id:1016;
MainRule "str:@@" "msg:double arobase (@@)" "mz:BODY|URL|ARGS|$HEADERS_VAR:Cookie" "s:$SQL:4" id:1017;


###############################
## OBVIOUS RFI IDs:1100-1199 ##
###############################
MainRule "str:http://" "msg:http:// scheme" "mz:ARGS|BODY|$HEADERS_VAR:Cookie" "s:$RFI:8" id:1100;
MainRule "str:https://" "msg:https:// scheme" "mz:ARGS|BODY|$HEADERS_VAR:Cookie" "s:$RFI:8" id:1101;
MainRule "str:ftp://" "msg:ftp:// scheme" "mz:ARGS|BODY|$HEADERS_VAR:Cookie" "s:$RFI:8" id:1102;
MainRule "str:php://" "msg:php:// scheme" "mz:ARGS|BODY|$HEADERS_VAR:Cookie" "s:$RFI:8" id:1103;
MainRule "str:sftp://" "msg:sftp:// scheme" "mz:ARGS|BODY|$HEADERS_VAR:Cookie" "s:$RFI:8" id:1104;
MainRule "str:zlib://" "msg:zlib:// scheme" "mz:ARGS|BODY|$HEADERS_VAR:Cookie" "s:$RFI:8" id:1105;
MainRule "str:data://" "msg:data:// scheme" "mz:ARGS|BODY|$HEADERS_VAR:Cookie" "s:$RFI:8" id:1106;
MainRule "str:glob://" "msg:glob:// scheme" "mz:ARGS|BODY|$HEADERS_VAR:Cookie" "s:$RFI:8" id:1107;
MainRule "str:phar://" "msg:phar:// scheme" "mz:ARGS|BODY|$HEADERS_VAR:Cookie" "s:$RFI:8" id:1108;
MainRule "str:file://" "msg:file:// scheme" "mz:ARGS|BODY|$HEADERS_VAR:Cookie" "s:$RFI:8" id:1109;
MainRule "str:gopher://" "msg:gopher:// scheme" "mz:ARGS|BODY|$HEADERS_VAR:Cookie" "s:$RFI:8" id:1110;
MainRule "str:zip://" "msg:zip:// scheme" "mz:ARGS|BODY|$HEADERS_VAR:Cookie" "s:$RFI:8" id:1111;
MainRule "str:expect://" "msg:expect:// scheme" "mz:ARGS|BODY|$HEADERS_VAR:Cookie" "s:$RFI:8" id:1112;
MainRule "str:input://" "msg:input:// scheme" "mz:ARGS|BODY|$HEADERS_VAR:Cookie" "s:$RFI:8" id:1113;


#######################################
## Directory traversal IDs:1200-1299 ##
#######################################                                          
MainRule "str:.." "msg:double dot" "mz:ARGS|URL|BODY|$HEADERS_VAR:Cookie" "s:$TRAVERSAL:4" id:1200;
MainRule "str:/etc/passwd" "msg:obvious probe" "mz:ARGS|URL|BODY|$HEADERS_VAR:Cookie" "s:$TRAVERSAL:4" id:1202;
MainRule "str:c:\\" "msg:obvious windows path" "mz:ARGS|URL|BODY|$HEADERS_VAR:Cookie" "s:$TRAVERSAL:4" id:1203;
MainRule "str:cmd.exe" "msg:obvious probe" "mz:ARGS|URL|BODY|$HEADERS_VAR:Cookie" "s:$TRAVERSAL:4" id:1204;
MainRule "str:\\" "msg:backslash" "mz:ARGS|URL|BODY|$HEADERS_VAR:Cookie" "s:$TRAVERSAL:4" id:1205;
#MainRule "str:/" "msg:slash in args" "mz:ARGS|BODY|$HEADERS_VAR:Cookie" "s:$TRAVERSAL:2" id:1206;
MainRule "str:/..;/" "msg:dir traversal bypass" "mz:ARGS|BODY|$HEADERS_VAR:Cookie" "s:$TRAVERSAL:2" id:1207;


########################################
## Cross Site Scripting IDs:1300-1399 ##
########################################
MainRule "str:<" "msg:html open tag" "mz:ARGS|URL|BODY|$HEADERS_VAR:Cookie" "s:$XSS:8" id:1302;
MainRule "str:>" "msg:html close tag" "mz:ARGS|URL|BODY|$HEADERS_VAR:Cookie" "s:$XSS:8" id:1303;
MainRule "str:[" "msg:open square backet ([), possible js" "mz:BODY|URL|ARGS|$HEADERS_VAR:Cookie" "s:$XSS:4" id:1310;
MainRule "str:]" "msg:close square bracket (]), possible js" "mz:BODY|URL|ARGS|$HEADERS_VAR:Cookie" "s:$XSS:4" id:1311;
MainRule "str:~" "msg:tilde (~) character" "mz:BODY|URL|ARGS|$HEADERS_VAR:Cookie" "s:$XSS:4" id:1312;
MainRule "str:`"  "msg:grave accent (`)" "mz:ARGS|URL|BODY|$HEADERS_VAR:Cookie" "s:$XSS:8" id:1314;
MainRule "rx:%[23]."  "msg:double encoding" "mz:ARGS|URL|BODY|$HEADERS_VAR:Cookie" "s:$XSS:8" id:1315;


####################################
## Evading tricks IDs: 1400-1500 ##
####################################
MainRule "str:&#" "msg:utf7/8 encoding" "mz:ARGS|BODY|URL|$HEADERS_VAR:Cookie" "s:$EVADE:4" id:1400;
MainRule "str:%U" "msg:M$ encoding" "mz:ARGS|BODY|URL|$HEADERS_VAR:Cookie" "s:$EVADE:4" id:1401;


#############################
## File uploads: 1500-1600 ##
#############################
MainRule "rx:\.ph|\.asp|\.ht|\.jsp" "msg:asp/php/jsp file upload" "mz:FILE_EXT" "s:$UPLOAD:8" id:1500;

参考：

https://ngx.hk/2016/12/06/naxsi规则简单说明.html

https://github.com/nbs-system/naxsi/blob/master/naxsi_config/naxsi_core.rules

修改时间 2021-05-12