关于漏洞扫描与注入拦截

漏洞扫描系统中扫描出来的漏洞中的xss注入和SQL注入

为拦截有风险的请求,在所有应用的统一入口处作了一次拦截，拦截包含以上漏洞中的关键字。但是正常业务的请求中也有可能包含有与注入攻击一样的关键字。如单引号，select,update,script,url等。统一拦截后，这一类请求无法提交，影响正常业务。

现在没有一个统一的标准来识别哪些请求需要拦截，哪些需要放行。

常见的请求如:

文档系统中上传文档时有一个文档的url

官网,论坛发布新闻时，新闻内容中含有url,英文内容时有可能含有sql关键字

可以设置url白名单，但是几十个系统中url有许多，名单中遗漏的业务会被拦截。

以下是nginx环节拦截的规则

if ($request_method !~* GET|POST) { return 444; }

if ($query_string ~* (\$|'|--|[+|(%20)]union[+|(%20)]|[+|(%20)]insert[+|(%20)]|[+|(%20)]drop[+|(%20)]|[+|(%20)]truncate[+|(%20)]|[+|(%20)]update[+|(%20)]|[+|(%20)]from[+|(%20)]|[+|(%20)]grant[+|(%20)]|[+|(%20)]exec[+|(%20)]|[+|(%20)]where[+|(%20)]|[+|(%20)]select[+|(%20)]|[+|(%20)]and[+|(%20)]|[+|(%20)]or[+|(%20)]|[+|(%20)]count[+|(%20)]|[+|(%20)]exec[+|(%20)]|[+|(%20)]chr[+|(%20)]|[+|(%20)]mid[+|(%20)]|[+|(%20)]like[+|(%20)]|[+|(%20)]iframe[+|(%20)]|[\<|%3c]script[\>|%3e]|javascript|alert|webscan|dbappsecurity|style|confirm\(|innerhtml|innertext)(.*)$) { return 555; }

if ($uri ~* (/~).*) { return 501; }

if ($uri ~* (\\x.)) { return 501; }

if ($query_string ~* "[;'<>].*") { return 509; }

if ($request_uri ~ " ") { return 509; }

if ($request_uri ~ (\/\.+)) { return 509; }

if ($request_uri ~ (\.+\/)) { return 509; }

#if ($uri ~* (insert|select|delete|update|count|master|truncate|declare|exec|\*|\')(.*)$ ) { return 503; }

if ($request_uri ~* "(cost\()|(concat\()") { return 504; }

if ($request_uri ~* "[+|(%20)]union[+|(%20)]") { return 504; }

if ($request_uri ~* "[+|(%20)]and[+|(%20)]") { return 504; }

if ($request_uri ~* "[+|(%20)]select[+|(%20)]") { return 504; }

if ($request_uri ~* "[+|(%20)]or[+|(%20)]") { return 504; }

if ($request_uri ~* "[+|(%20)]delete[+|(%20)]") { return 504; }

if ($request_uri ~* "[+|(%20)]update[+|(%20)]") { return 504; }

if ($request_uri ~* "[+|(%20)]insert[+|(%20)]") { return 504; }

if ($query_string ~ "(<|%3C).*script.*(>|%3E)") { return 505; }

if ($query_string ~ "GLOBALS(=|\[|\%[0-9A-Z]{0,2})") { return 505; }

if ($query_string ~ "_REQUEST(=|\[|\%[0-9A-Z]{0,2})") { return 505; }

if ($query_string ~ "proc/self/environ") { return 505; }

if ($query_string ~ "mosConfig_[a-zA-Z_]{1,21}(=|\%3D)") { return 505; }

if ($query_string ~ "base64_(en|de)code$.*$") { return 505; }

#if ($query_string ~ "[a-zA-Z0-9_]=http://") { return 506; }

if ($query_string ~ "[a-zA-Z0-9_]=(\.\.//?)+") { return 506; }

if ($query_string ~ "[a-zA-Z0-9_]=/([a-z0-9_.]//?)+") { return 506; }

if ($query_string ~ "b(ultram|unicauca|valium|viagra|vicodin|xanax|ypxaieo)b") { return 507; }

if ($query_string ~ "b(erections|hoodia|huronriveracres|impotence|levitra|libido)b") {return 507; }

if ($query_string ~ "b(ambien|bluespill|cialis|cocaine|ejaculation|erectile)b") { return 507; }

if ($query_string ~ "b(lipitor|phentermin|pro[sz]ac|sandyauer|tramadol|troyhamby)b") { return 507; }

if ($http_user_agent ~* YisouSpider|ApacheBench|WebBench|Jmeter|JoeDog|Havij|GetRight|TurnitinBot|GrabNet|masscan|mail2000|github|wget|curl|Java|python) { return 508; }

if ($http_user_agent ~* "Go-Ahead-Got-It") { return 508; }

if ($http_user_agent ~* "GetWeb!") { return 508; }

if ($http_user_agent ~* "Go!Zilla") { return 508; }

if ($http_user_agent ~* "Download Demon") { return 508; }

if ($http_user_agent ~* "Indy Library") { return 508; }

if ($http_user_agent ~* "libwww-perl") { return 508; }

if ($http_user_agent ~* "Nmap Scripting Engine") { return 508; }

if ($http_user_agent ~* "WebBench*") { return 508; }

if ($http_user_agent ~* "spider") { return 508; }

if ($http_referer ~* 17ce.com) { return 509; }

if ($http_referer ~* WebBench*") { return 509; }

工作笔记

关于漏洞扫描与注入拦截