This bug was fixed in the package openssh - 1:7.2p2-4ubuntu1
---------------
openssh (1:7.2p2-4ubuntu1) xenial; urgency=medium
* Backport upstream patch to unbreak authentication using lone certificate
keys in ssh-agent: when attempting pubkey auth with a certificate, if no
separate private key is found among the keys then try with the
certificate key itself (thanks, Paul Querna; LP: #1575961).
-- Colin Watson <cjwat...@ubuntu.com> Thu, 28 Apr 2016 01:57:51 +0100
** Changed in: openssh (Ubuntu Xenial)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1575961
Title:
OpenSSH Client Certificate Auth Regression
Status in openssh package in Ubuntu:
Fix Released
Status in openssh source package in Xenial:
Fix Released
Bug description:
OpenSSH Client Certificates worked in Ubuntu 15.10 and 14.04 LTS --
but not 16.04.
OpenSSH 7.2.p2 includes a bug in how it loads keys & certificates, and
basically will never find the correct private key for an OpenSSH
Client Certificate.
This is the upstream bug:
https://bugzilla.mindrot.org/show_bug.cgi?id=2550
Fix was committed on March 14:
https://github.com/openssh/openssh-
portable/commit/c38905ba391434834da86abfc988a2b8b9b62477
I've tested with the attached patch, and it allows Client Certificate
auth to work at all.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/1575961/+subscriptions
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