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33fce8a71d
- fixing some Metrics::add_data() call signatures - slight refactors to cluster framework @if and adding a NONE NodeType for so local_node_type() will return that instead of just emitting an error when cluster mode isn't enabled - `make restdoc` target now uses bro's bare-mode - bro scripts generated from bifs now really only live in the build/src/base/ directory and changed the DocSourcesList.cmake to dynamically figure out what bifs exist by looking in src/ instead of build/src/ - add some missing @load dependencies
61 lines
3 KiB
Text
61 lines
3 KiB
Text
##! SQL injection detection in HTTP.
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@load base/frameworks/notice/main
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@load base/frameworks/metrics/main
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@load base/protocols/http/main
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module HTTP;
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export {
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redef enum Notice::Type += {
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SQL_Injection_Attacker,
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SQL_Injection_Attack,
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};
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redef enum Metrics::ID += {
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SQL_ATTACKS,
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SQL_ATTACKS_AGAINST,
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};
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redef enum Tags += {
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## Indicator of a URI based SQL injection attack.
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URI_SQLI,
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## Indicator of client body based SQL injection attack. This is
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## typically the body content of a POST request. Not implemented yet.
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POST_SQLI,
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## Indicator of a cookie based SQL injection attack. Not implemented yet.
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COOKIE_SQLI,
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};
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## This regular expression is used to match URI based SQL injections
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const match_sql_injection_uri =
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/[\?&][^[:blank:]\x00-\x37\|]+?=[\-[:alnum:]%]+([[:blank:]\x00-\x37]|\/\*.*?\*\/)*['"]?([[:blank:]\x00-\x37]|\/\*.*?\*\/|\)?;)+.*?([hH][aA][vV][iI][nN][gG]|[uU][nN][iI][oO][nN]|[eE][xX][eE][cC]|[sS][eE][lL][eE][cC][tT]|[dD][eE][lL][eE][tT][eE]|[dD][rR][oO][pP]|[dD][eE][cC][lL][aA][rR][eE]|[cC][rR][eE][aA][tT][eE]|[iI][nN][sS][eE][rR][tT])([[:blank:]\x00-\x37]|\/\*.*?\*\/)+/
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| /[\?&][^[:blank:]\x00-\x37\|]+?=[\-0-9%]+([[:blank:]\x00-\x37]|\/\*.*?\*\/)*['"]?([[:blank:]\x00-\x37]|\/\*.*?\*\/|\)?;)+([xX]?[oO][rR]|[nN]?[aA][nN][dD])([[:blank:]\x00-\x37]|\/\*.*?\*\/)+['"]?(([^a-zA-Z&]+)?=|[eE][xX][iI][sS][tT][sS])/
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| /[\?&][^[:blank:]\x00-\x37]+?=[\-0-9%]*([[:blank:]\x00-\x37]|\/\*.*?\*\/)*['"]([[:blank:]\x00-\x37]|\/\*.*?\*\/)*(-|=|\+|\|\|)([[:blank:]\x00-\x37]|\/\*.*?\*\/)*([0-9]|\(?[cC][oO][nN][vV][eE][rR][tT]|[cC][aA][sS][tT])/
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| /[\?&][^[:blank:]\x00-\x37\|]+?=([[:blank:]\x00-\x37]|\/\*.*?\*\/)*['"]([[:blank:]\x00-\x37]|\/\*.*?\*\/|;)*([xX]?[oO][rR]|[nN]?[aA][nN][dD]|[hH][aA][vV][iI][nN][gG]|[uU][nN][iI][oO][nN]|[eE][xX][eE][cC]|[sS][eE][lL][eE][cC][tT]|[dD][eE][lL][eE][tT][eE]|[dD][rR][oO][pP]|[dD][eE][cC][lL][aA][rR][eE]|[cC][rR][eE][aA][tT][eE]|[rR][eE][gG][eE][xX][pP]|[iI][nN][sS][eE][rR][tT])([[:blank:]\x00-\x37]|\/\*.*?\*\/|[\[(])+[a-zA-Z&]{2,}/
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| /[\?&][^[:blank:]\x00-\x37]+?=[^\.]*?([cC][hH][aA][rR]|[aA][sS][cC][iI][iI]|[sS][uU][bB][sS][tT][rR][iI][nN][gG]|[tT][rR][uU][nN][cC][aA][tT][eE]|[vV][eE][rR][sS][iI][oO][nN]|[lL][eE][nN][gG][tT][hH])\(/
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| /\/\*![[:digit:]]{5}.*?\*\// &redef;
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}
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event bro_init()
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{
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Metrics::add_filter(SQL_ATTACKS, [$log=T,
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$break_interval=1mins,
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$note=SQL_Injection_Attacker]);
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Metrics::add_filter(SQL_ATTACKS_AGAINST, [$log=T,
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$break_interval=1mins,
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$note=SQL_Injection_Attack,
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$notice_thresholds=vector(10,100)]);
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}
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event http_request(c: connection, method: string, original_URI: string,
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unescaped_URI: string, version: string) &priority=3
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{
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if ( match_sql_injection_uri in unescaped_URI )
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{
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add c$http$tags[URI_SQLI];
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Metrics::add_data(SQL_ATTACKS, [$host=c$id$orig_h], 1);
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Metrics::add_data(SQL_ATTACKS_AGAINST, [$host=c$id$resp_h], 1);
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}
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}
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