The request was rejected because the URL contained a potentially malicious String "%2e"

leepandar發表於2024-04-17
AI

org.springframework.security.web.firewall.RequestRejectedException: The request was rejected because the URL contained a potentially malicious String "%2e"

org.springframework.security.web.firewall.RequestRejectedException: The request was rejected because the URL contained a potentially malicious String “%3B”

org.springframework.security.web.firewall.RequestRejectedException: The request was rejected because the URL contained a potentially malicious String “//”

類似這些報錯，意思時請求URL中有非法字元“;”原因是SpringSecurity的防火牆中預設將分號，雙斜線等特殊字元遮蔽掉了。

解決辦法

  • 1.去掉url中的分號，雙斜線等特殊字元（推薦）

  • 2.自定義防火牆規則，放行特殊字元
    在SecurityConfig配置類中增加HttpFirewall的Bean

 @Bean
    public HttpFirewall allowUrlEncodedSlashHttpFirewall() {
        StrictHttpFirewall firewall = new StrictHttpFirewall();
        firewall.setAllowUrlEncodedDoubleSlash(true);
        firewall.setAllowBackSlash(true);
        firewall.setAllowSemicolon(true);
        firewall.setAllowUrlEncodedPercent(true);
        firewall.setAllowUrlEncodedSlash(true);
        firewall.setAllowUrlEncodedPeriod(true);
        return firewall;
    }

同時在Websecurity中配置此bean

    @Override
    public void configure(WebSecurity web) throws Exception {
        super.configure(web);
        web.httpFirewall(allowUrlEncodedSlashHttpFirewall());
    }

注：
setAllowSemicolon(true)為放行分號(;或者%3b或者%3B)，

setAllowUrlEncodedSlash(true) 放行斜槓(%2f或者%2F)

setAllowBackSlash(boolean) 放行反斜槓(\或者%5c或者%5B)

setAllowUrlEncodedPercent(boolean) 放行百分號(URL編碼後為%25)

setAllowUrlEncodedPeriod(boolean) 放行英文句號.(%2e或者%2E)

SecurityConfig配置類

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.http.HttpMethod;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.builders.WebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import org.springframework.security.web.authentication.logout.LogoutFilter;
import org.springframework.security.web.firewall.HttpFirewall;
import org.springframework.security.web.firewall.StrictHttpFirewall;
import org.springframework.web.filter.CorsFilter;
import com.nongyeservice.framework.security.filter.JwtAuthenticationTokenFilter;
import com.nongyeservice.framework.security.handle.AuthenticationEntryPointImpl;
import com.nongyeservice.framework.security.handle.LogoutSuccessHandlerImpl;

/**
 * spring security配置
 */
@EnableGlobalMethodSecurity(prePostEnabled = true, securedEnabled = true)
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    /**
     * 自定義使用者認證邏輯
     */
    @Autowired
    private UserDetailsService userDetailsService;

    /**
     * 認證失敗處理類
     */
    @Autowired
    private AuthenticationEntryPointImpl unauthorizedHandler;

    /**
     * 退出處理類
     */
    @Autowired
    private LogoutSuccessHandlerImpl logoutSuccessHandler;

    /**
     * token認證過濾器
     */
    @Autowired
    private JwtAuthenticationTokenFilter authenticationTokenFilter;

    /**
     * 跨域過濾器
     */
    @Autowired
    private CorsFilter corsFilter;

    /**
     * 解決 無法直接注入 AuthenticationManager
     *
     * @return
     * @throws Exception
     */
    @Bean
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }

    /**
     * anyRequest          |   匹配所有請求路徑
     * access              |   SpringEl表示式結果為true時可以訪問
     * anonymous           |   匿名可以訪問
     * denyAll             |   使用者不能訪問
     * fullyAuthenticated  |   使用者完全認證可以訪問（非remember-me下自動登入）
     * hasAnyAuthority     |   如果有引數，參數列示許可權，則其中任何一個許可權可以訪問
     * hasAnyRole          |   如果有引數，參數列示角色，則其中任何一個角色可以訪問
     * hasAuthority        |   如果有引數，參數列示許可權，則其許可權可以訪問
     * hasIpAddress        |   如果有引數，參數列示IP地址，如果使用者IP和引數匹配，則可以訪問
     * hasRole             |   如果有引數，參數列示角色，則其角色可以訪問
     * permitAll           |   使用者可以任意訪問
     * rememberMe          |   允許透過remember-me登入的使用者訪問
     * authenticated       |   使用者登入後可訪問
     */
    @Override
    protected void configure(HttpSecurity httpSecurity) throws Exception {
        httpSecurity
                // CSRF禁用，因為不使用session
                .csrf().disable()
                // 認證失敗處理類
                .exceptionHandling().authenticationEntryPoint(unauthorizedHandler).and()
                // 基於token，所以不需要session
                .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS).and()
                // 過濾請求
                .authorizeRequests()
                // 對於登入login 驗證碼captchaImage 允許匿名訪問
                .antMatchers("/login", "/app/login", "/captchaImage","/getLoginUrl").anonymous()
                .antMatchers(
                        HttpMethod.GET,
                        "/*.html",
                        "/**/*.html",
                        "/**/*.css",
                        "/**/*.js"
                ).permitAll()
                .antMatchers("/profile/**").anonymous()
                .antMatchers("/common/download**").anonymous()
                .antMatchers("/common/download/resource**").anonymous()
                .antMatchers("/swagger-ui.html").anonymous()
                .antMatchers("/swagger-resources/**").anonymous()
                .antMatchers("/webjars/**").anonymous()
                .antMatchers("/*/api-docs").anonymous()
                .antMatchers("/druid/**").anonymous()
                .antMatchers("/login", "/captcha/get", "/captcha/check").anonymous()
                .antMatchers("/register/**").anonymous()
                // 除上面外的所有請求全部需要鑑權認證
                .anyRequest().authenticated()
                .and()
                .headers().frameOptions().disable();
        httpSecurity.logout().logoutUrl("/logout").logoutSuccessHandler(logoutSuccessHandler);
        // 新增JWT filter
        httpSecurity.addFilterBefore(authenticationTokenFilter, UsernamePasswordAuthenticationFilter.class);
        // 新增CORS filter
        httpSecurity.addFilterBefore(corsFilter, JwtAuthenticationTokenFilter.class);
        httpSecurity.addFilterBefore(corsFilter, LogoutFilter.class);
    }

    @Override
    public void configure(WebSecurity web) throws Exception {
        super.configure(web);
        web.httpFirewall(allowUrlEncodedSlashHttpFirewall());
    }

    @Bean
    public HttpFirewall allowUrlEncodedSlashHttpFirewall() {
        StrictHttpFirewall firewall = new StrictHttpFirewall();
        firewall.setAllowUrlEncodedDoubleSlash(true);
        firewall.setAllowBackSlash(true);
        firewall.setAllowSemicolon(true);
        firewall.setAllowUrlEncodedPercent(true);
        firewall.setAllowUrlEncodedSlash(true);
        firewall.setAllowUrlEncodedPeriod(true);
        return firewall;
    }

    /**
     * 強雜湊雜湊加密實現
     */
    @Bean
    public BCryptPasswordEncoder bCryptPasswordEncoder() {
        return new BCryptPasswordEncoder();
    }

    /**
     * 身份認證介面
     */
    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService).passwordEncoder(bCryptPasswordEncoder());
    }
}

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