Overview
CVE-2022-23726 describes a real-worldSensitive Data Exposure issue linked to PingCentral versions that exposed Spring Boot actuator endpoints when administrative authentication was present. In such configurations, actuator endpoints could reveal large amounts of sensitive environmental and application information, including properties, environment variables, and configuration properties. This falls under CWE-200 (Information Exposure) and CWE-732 (Incorrect Access Control), since sensitive data could be disclosed to entities with administrative access or misconfigured access rules. Attackers with valid admin credentials or misconfigured access could leverage endpoints like /actuator/env and /actuator/configprops to harvest secrets, tokens, and system details which substantially elevate risk in production environments. The exposure not only leaks configuration details but also increases the attack surface by providing insights into deployment infrastructure and secret management practices.
Exploitation typically occurred when PingCentral deployments left actuator endpoints broadly exposed or inadequately protected, effectively enabling sensitive data retrieval if the requester could authenticate as an administrator. Even with authentication in place, overly broad exposure (for example, exposing all actuator endpoints via management.endpoints.web.exposure.include=/*) could permit unintended data access. Remediation focuses on limiting actuator data exposure, enforcing strict authentication/authorization, and ensuring sensitive endpoints are not reachable by untrusted clients.
To fix this in real Spring Boot (Java) code, disable or tightly control actuator endpoints, and enforce robust security on actuator paths. Use Spring Security to restrict access to sensitive endpoints, and configure management endpoints exposure to include only non-sensitive data (e.g., health,info) or exclude env/configprops/beans explicitly. Validate that environment variables and secrets are not exposed in logs or responses. After applying fixes, test by attempting to access sensitive endpoints with and without proper admin credentials and review the response data for any leakage.
In production, pair these code/config changes with secure secret management (externalized config, vaults), rotate credentials, monitor actuator access logs, and implement network-level controls to restrict actuator access to trusted networks or management networks.
Code Fix Example
Spring Boot API Security Remediation
VULNERABLE PATTERN (broad actuator exposure with permissive access):
package com.example.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
@SpringBootApplication
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
// Vulnerable: actuator endpoints exposed with permissive access and basic auth that may reveal sensitive data
@Bean
public WebSecurityConfigurerAdapter vulnerableSecurity() {
return new WebSecurityConfigurerAdapter() {
@Override
protected void configure(HttpSecurity http) throws Exception {
http
.authorizeRequests()
.antMatchers("/actuator/**").permitAll() // Highly insecure: allows anyone to access actuator data
.anyRequest().authenticated()
.and()
.httpBasic();
// Not recommended for production
http.csrf().disable();
}
};
}
}
FIXED PATTERN (restricted exposure and proper admin access):
package com.example.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
@SpringBootApplication
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
@EnableWebSecurity
public static class FixedSecurity extends WebSecurityConfigurerAdapter {
@Override
protected void configure(HttpSecurity http) throws Exception {
http
.authorizeRequests()
.antMatchers("/actuator/health", "/actuator/info").permitAll() // safe endpoints
.antMatchers("/actuator/**").hasRole("ADMIN") // protect sensitive endpoints
.anyRequest().authenticated()
.and()
.httpBasic();
// Optional: CSRF protection enabled in production as needed
http.csrf().disable();
}
}
}