This patch has been rejected upstream: "None of the OpenSSH developers are
in favour of adding this, and this situation has not changed for several
years. This is not a slight on Simon's patch, which is of fine quality, but
just that a) we don't trust GSSAPI implementations that much and b) we don't
like adding new KEX since they are pre-auth attack surface. This one is
particularly scary, since it requires hooks out to typically root-owned
system resources."
However, quite a lot of people rely on this in Debian, and it's better to
have it merged into the main openssh package rather than having separate
-krb5 packages (as we used to have). It seems to have a generally good
security history.
2024-03-13 update:
Upstream commit dbb339f015c33d63484261d140c84ad875a9e548 ("prepare for
multiple names for authmethods") changed the Authmethod structure to
incorporate a new element "synonym", and also changed the signature of the
userauth_gssapi function to have an extra method parameter. These changes need
to be replicated to the gsskeyex patch.
This fixes LP: #2053146
Author: Simon Wilkinson <simon@sxw.org.uk>
Author: Colin Watson <cjwatson@debian.org>
Author: Jakub Jelen <jjelen@redhat.com>
Origin: other, https://github.com/openssh-gsskex/openssh-gsskex/pull/23
Bug: https://bugzilla.mindrot.org/show_bug.cgi?id=1242
Last-Updated: 2024-03-13
Patch-Name: gssapi.patch
Gbp-Pq: Name gssapi.patch
Simon Wilkinson