module

Spring Framework Class property RCE (Spring4Shell)

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Disclosed
Mar 31, 2022
Created
May 10, 2022

Description

Spring Framework versions 5.3.0 to 5.3.17, 5.2.0 to 5.2.19, and older versions when running on JDK 9 or above
and specifically packaged as a traditional WAR and deployed in a standalone Tomcat instance are vulnerable
to remote code execution due to an unsafe data binding used to populate an object from request parameters
to set a Tomcat specific ClassLoader. By crafting a request to the application and referencing the
org.apache.catalina.valves.AccessLogValve class through the classLoader with parameters such as the following:
class.module.classLoader.resources.context.parent.pipeline.first.suffix=.jsp, an unauthenticated attacker can
gain remote code execution.

Author

vleminator vleminator@gmail.com

Platform

Linux,Windows

References

Module Options

To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':


    msf > use exploit/multi/http/spring_framework_rce_spring4shell
    msf exploit(spring_framework_rce_spring4shell) > show targets
        ...targets...
    msf exploit(spring_framework_rce_spring4shell) > set TARGET < target-id >
    msf exploit(spring_framework_rce_spring4shell) > show options
        ...show and set options...
    msf exploit(spring_framework_rce_spring4shell) > exploit
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