CVE-2014-0054: Cross-Site Request Forgery in Spring Framework

Background

The Spring Framework is a popular open-source application framework for Java. It provides comprehensive infrastructure support for developing Java applications. The Spring MVC module within the framework is responsible for building web applications. It includes the Jaxb2RootElementHttpMessageConverter, which is used for converting XML messages to Java objects and vice versa. This module is vulnerable to a Cross-Site Request Forgery (CSRF) attack due to incomplete fixes for previous vulnerabilities (CVE-2013-4152, CVE-2013-7315, and CVE-2013-6429).

Vulnerability Detail

The Jaxb2RootElementHttpMessageConverter in Spring MVC does not disable external entity resolution, making it susceptible to XML External Entity (XXE) attacks. An attacker can exploit this vulnerability by crafting malicious XML requests, leading to arbitrary file reading, denial of service, and CSRF attacks. This can result in unauthorized access to sensitive information, system compromise, and potential data breaches.

Workaround

If upgrading the Spring Framework is not immediately feasible, a temporary workaround is to manually disable external entity resolution in the Jaxb2RootElementHttpMessageConverter. This can be achieved by customizing the message converter configuration to disallow external entities. Here is an example of how to disable external entity resolution in Spring MVC:

@Configuration
public class WebMvcConfig extends WebMvcConfigurerAdapter {

    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        converters.add(new Jaxb2RootElementHttpMessageConverter() {
            {
                setSupportDtd(false);
                setProcessExternalEntities(false);
            }
        });
    }

}

Conclusion

The Cross-Site Request Forgery (CSRF) vulnerability in the Spring Framework's Jaxb2RootElementHttpMessageConverter can lead to unauthorized access, file reading, denial of service, and potential data breaches. It is crucial to upgrade to a fixed version of the Spring Framework or apply the provided workaround to mitigate the risk. For further assistance and support in vulnerability remediation, please contact DevNack.com.

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