Re: OpenSSH Security Advisory: xauth command injection

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On Fri, Mar 11, 2016 at 9:15 AM, Dag-Erling Smørgrav <des@xxxxxx> wrote:
> Nico Kadel-Garcia <nkadel@xxxxxxxxx> writes:
>> Dag-Erling Smørgrav <des@xxxxxx> writes:
>> > Some OS distributions (FreeBSD, RHEL / CentOS, probably Fedora) have
>> > X11Forwarding enabled by default.
>> I'm not sure I see your point.
>
> With X11Forwarding off by default, one would assume that it is only
> enabled on a case-by-case basis for users or groups who already have the
> necessary privileges to run arbitrary code on the server and therefore
> have nothing to gain from exploiting this bug.  With X11Forwarding on by
> default, it might remain enabled for e.g. gitolite users.
>
> DES

OK, right. gitolite and similar tools that use ForcCommand, such as
"svn+ssh" based setups or "rsnapshot" based backup setups should be
ideally, be publishing keys with Forcecommand and
no-port-forwarding,no-X11-forwarding,no-pty" options.
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