'succesful' nsupdate of remote server not persistent across nameserver restart?

[Tony Finch]

Matthew Pounsett <matt at conundrum.com> wrote:
>
> Privsep doesn't actually fix the same problem chroot does.   As I
> understand it, privsep reduces the attack surface for remote execution
> exploits by shuffling off privileged operations to a separate process, but
> if that process isn't chrooted and it has a remote code execution flaw then
> your entire system is opened up to attack.

Actually it is normal for privsep processes to chroot themselves, usually
to /var/empty - e.g.

https://github.com/openssh/openssh-portable/blob/master/sshd.c#l642
https://github.com/openntpd-portable/openntpd-openbsd/blob/master/src/usr.sbin/ntpd/ntp.c#l130

Tony.
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