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Linux下应用层注入/hook技术实现端口复用

C++ 13.61% C 84.95% Makefile 0.63% Shell 0.81%

port_resue's Introduction

端口复用（Port Reuse）

技术原理

注入SSH/Apache2等进程，挂钩accept/read/write等函数。复用对方服务端口，加密转发自身流量，实现反弹Shell、文件上传下载等。

使用方法

client_on_windows
- define HOST 处设定目标IP
- define PORT 处设定目标端口
- 使用VS2019编译运行
server_on_linux
- injectme.c => define PASSWORD处设定密码（默认为Qihoo）
- 运行对应inject-xxx脚本（可能需要设定chmod +x inject-xxx.sh）

测试概况

操作系统	SSH:22	apache2:80
kali 2020	一切正常	一切正常
ubuntu 9	一切正常	注入worker进程段错误（即使注入空so文件）
centos 7	成功注入，运行过程段错误(需要事先setenforce 0)	注入worker进程dlopen调用失败（即使注入空so文件）

参考链接

Linux ptrace introduction AKA injecting into sshd：https://blog.xpnsec.com/linux-process-injection-aka-injecting-into-sshd-for-fun/
Tool for injecting a shared object into a Linux process：https://github.com/gaffe23/linux-inject

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