漏洞描述
Openssh Server 中8.5p1 和 9.7p1 之间的版本中存在一处条件竞争漏洞，如果客户端在 120 秒内没有进行身份验证（由 LoginGraceTime 定义的设置），则 sshd 的 SIGALRM 处理程序会以一种非异步信号安全的方式异步调用，成功的利用此漏洞可以导致远程攻击者以root的权限执行远程代码。漏洞编号：CVE-2024-6387，漏洞危害等级：严重。
OpenSSH 条件竞争漏洞
PoC代码
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