CVE-2022-22965

ADVISORY - github

Summary

Spring Framework prior to versions 5.2.20 and 5.3.18 contains a remote code execution vulnerability known as Spring4Shell.

Impact

A Spring MVC or Spring WebFlux application running on JDK 9+ may be vulnerable to remote code execution (RCE) via data binding. The specific exploit requires the application to run on Tomcat as a WAR deployment. If the application is deployed as a Spring Boot executable jar, i.e. the default, it is not vulnerable to the exploit. However, the nature of the vulnerability is more general, and there may be other ways to exploit it.

These are the prerequisites for the exploit:

  • JDK 9 or higher
  • Apache Tomcat as the Servlet container
  • Packaged as WAR
  • spring-webmvc or spring-webflux dependency

Patches

Workarounds

For those who are unable to upgrade, leaked reports recommend setting disallowedFields on WebDataBinder through an @ControllerAdvice. This works generally, but as a centrally applied workaround fix, may leave some loopholes, in particular if a controller sets disallowedFields locally through its own @InitBinder method, which overrides the global setting.

To apply the workaround in a more fail-safe way, applications could extend RequestMappingHandlerAdapter to update the WebDataBinder at the end after all other initialization. In order to do that, a Spring Boot application can declare a WebMvcRegistrations bean (Spring MVC) or a WebFluxRegistrations bean (Spring WebFlux).

EPSS Score: 0.9446 (1.000)

Common Weakness Enumeration (CWE)

ADVISORY - nist

Improper Control of Generation of Code ('Code Injection')

ADVISORY - github

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

Improper Control of Generation of Code ('Code Injection')

ADVISORY - gitlab

OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities

Improper Input Validation

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities

Improper Control of Generation of Code ('Code Injection')

ADVISORY - gitlab

OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities

ADVISORY - gitlab

OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities

ADVISORY - gitlab

OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities

ADVISORY - gitlab

OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities

ADVISORY - redhat

Improper Control of Generation of Code ('Code Injection')


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