sshd

共 2 篇文章。

严重安全问题公告 FreeBSD SA-06:09.sshd

Security

我们今天发布了 FreeBSD SA-06:09.sshd,这是一个针对 sshd 的 DoS 攻击。如果您使用的是 FreeBSD 5.3、5.4或5.5-PRERELEASE(到昨天之前的版本),请立即升级到最新的安全分支。

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Signal in init(8)?!

Kernel

Strange thing happen.

  1. Start your FreeBSD single-user.
  2. Run /etc/netstart so your network is up.
  3. Run /etc/rc.d/sshd start so you have sshd
  4. Use ssh to login localhost, then su(1) to root
  5. Type “init q”

Then init(8) would crash with signal 11. Yes, it was killed. As soon as kernel found this, it would panic with “Going nowhere without my init!”.

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