Comment 9 for bug 1938144

Dmitry Belyavskiy proposed a patch for this issue at https://github.com/openssh-gsskex/openssh-gsskex/pull/21.

I created a PPA with the proposed fix at https://launchpad.net/~athos-ribeiro/+archive/ubuntu/openssh-gssapi-fix/+packages and I can confirm it does fix the reproducer proposed in this bug.

Moreover, running the server with

/usr/sbin/sshd -d -p 2222 -f /dev/null -o GSSAPIKeyExchange=yes -o GSSAPIAuthentication=yes -o PasswordAuthentication=yes -o PermitRootLogin=yes

And logging in as root, will prompt for the root password and get you a proper ssh connection.

Finally, I also ran the available openssh dep8 test suite to ensure the patch would not introduce covered regrerssions.

autopkgtest [17:57:18]: @@@@@@@@@@@@@@@@@@@@ summary
regress PASS

Niklas, it would be really nice if you could also test the proposed patch to confirm it does fix the reported issue.