Nginx中防止SQL注入攻擊的相關(guān)配置介紹
防止sql注入最好的辦法是對于提交后臺(tái)的所有數(shù)據(jù)都進(jìn)行過濾轉(zhuǎn)義。
對于簡單的情況,比如包含單引號(hào)' , 分號(hào);, <, >, 等字符可通過rewrite直接重訂向到404頁面來避免。
用rewrite有個(gè)前提需要知道,一般用rewrite進(jìn)行正則匹配只能匹配到網(wǎng)頁的URI,也就是url中?前部分,?以后部分是請求參數(shù)。
問號(hào)后面的請求參數(shù),在nginx用$query_string表 示,不能在rewrite中匹配到,需要用if判斷
例如,對于參數(shù)中帶有單引號(hào)的'進(jìn)行匹配然后定向到錯(cuò)誤頁面,
/plus/list.php?tid=19&mid=1124' rewrite ^.*([;'<>]).* /error.html break;
直接寫這樣的一條重寫肯定不會(huì)正確匹配,因?yàn)閞ewrite參數(shù)只會(huì)匹配請求的uri,也就是/plus/list.php部分。
需要使用$query_string 借助if進(jìn)行判斷,如果查詢串種包含特殊字符,返回404。
if ( $query_string ~* ".*[;'<>].*" ){ return 404; }
下面來分享一個(gè)配置文件實(shí)例:
server { ## 禁SQL注入 Block SQL injections set $block_sql_injections 0; if ($query_string ~ “union.*select.*(“) { set $block_sql_injections 1; } if ($query_string ~ “union.*all.*select.*”) { set $block_sql_injections 1; } if ($query_string ~ “concat.*(“) { set $block_sql_injections 1; } if ($block_sql_injections = 1) { return 444; } ## 禁掉文件注入 set $block_file_injections 0; if ($query_string ~ “[a-zA-Z0-9_]=http://”) { set $block_file_injections 1; } if ($query_string ~ “[a-zA-Z0-9_]=(..//?)+”) { set $block_file_injections 1; } if ($query_string ~ “[a-zA-Z0-9_]=/([a-z0-9_.]//?)+”) { set $block_file_injections 1; } if ($block_file_injections = 1) { return 444; } ## 禁掉溢出攻擊 set $block_common_exploits 0; if ($query_string ~ “(<|%3C).*script.*(>|%3E)”) { set $block_common_exploits 1; } if ($query_string ~ “GLOBALS(=|[|%[0-9A-Z]{0,2})”) { set $block_common_exploits 1; } if ($query_string ~ “_REQUEST(=|[|%[0-9A-Z]{0,2})”) { set $block_common_exploits 1; } if ($query_string ~ “proc/self/environ”) { set $block_common_exploits 1; } if ($query_string ~ “mosConfig_[a-zA-Z_]{1,21}(=|%3D)”) { set $block_common_exploits 1; } if ($query_string ~ “base64_(en|de)code(.*)”) { set $block_common_exploits 1; } if ($block_common_exploits = 1) { return 444; } ## 禁spam字段 set $block_spam 0; if ($query_string ~ “b(ultram|unicauca|valium|viagra|vicodin|xanax|ypxaieo)b”) { set $block_spam 1; } if ($query_string ~ “b(erections|hoodia|huronriveracres|impotence|levitra|libido)b”) { set $block_spam 1; } if ($query_string ~ “b(ambien|bluespill|cialis|cocaine|ejaculation|erectile)b”) { set $block_spam 1; } if ($query_string ~ “b(lipitor|phentermin|pro[sz]ac|sandyauer|tramadol|troyhamby)b”) { set $block_spam 1; } if ($block_spam = 1) { return 444; } ## 禁掉user-agents set $block_user_agents 0; # Don't disable wget if you need it to run cron jobs! #if ($http_user_agent ~ “Wget”) { # set $block_user_agents 1; #} # Disable Akeeba Remote Control 2.5 and earlier if ($http_user_agent ~ “Indy Library”) { set $block_user_agents 1; } # Common bandwidth hoggers and hacking tools. if ($http_user_agent ~ “l(fā)ibwww-perl”) { set $block_user_agents 1; } if ($http_user_agent ~ “GetRight”) { set $block_user_agents 1; } if ($http_user_agent ~ “GetWeb!”) { set $block_user_agents 1; } if ($http_user_agent ~ “Go!Zilla”) { set $block_user_agents 1; } if ($http_user_agent ~ “Download Demon”) { set $block_user_agents 1; } if ($http_user_agent ~ “Go-Ahead-Got-It”) { set $block_user_agents 1; } if ($http_user_agent ~ “TurnitinBot”) { set $block_user_agents 1; } if ($http_user_agent ~ “GrabNet”) { set $block_user_agents 1; } if ($http_user_agent ~ "WebBench") { set $block_user_agents 1; } if ($http_user_agent ~ "ApacheBench") { set $block_user_agents 1; } if ($http_user_agent ~ ^$) { set $block_user_agents 1; } if ($http_user_agent ~ "Python-urllib") { set $block_user_agents 1; } if ($block_user_agents = 1) { return 444; } }
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