[Bug 2028282] [NEW] SSH pubkey authetication fails when GSSAPI enabled

[Moritz Carmesin]

Public bug reported:

Since the upgrade from Ubuntu 20.04 to 22.04 the SSH login via a SSH
pubkey to our servers fails, while password and kerberos are still
working.

$ssh user at server
sign_and_send_pubkey: internal error: initial hostkey not recorded 

This seem related to the bugreport at openssh:
https://bugzilla.mindrot.org/show_bug.cgi?id=3406

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: openssh-server 1:8.9p1-3ubuntu0.1
ProcVersionSignature: Ubuntu 5.15.0-76.83-generic 5.15.99
Uname: Linux 5.15.0-76-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
CasperMD5CheckResult: pass
CloudArchitecture: x86_64
CloudID: none
CloudName: none
CloudPlatform: none
CloudSubPlatform: config
Date: Thu Jul 20 17:25:01 2023
InstallationDate: Installed on 2020-08-24 (1060 days ago)
InstallationMedia: Ubuntu-Server 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
SourcePackage: openssh
UpgradeStatus: Upgraded to jammy on 2023-07-20 (0 days ago)

** Affects: openssh (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug jammy uec-images

** Attachment added: "Log of ssh -vvv user at server"
   https://bugs.launchpad.net/bugs/2028282/+attachment/5687469/+files/ssh.log

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https://bugs.launchpad.net/bugs/2028282

Title:
  SSH pubkey authetication fails when GSSAPI enabled

Status in openssh package in Ubuntu:
  New

Bug description:
  Since the upgrade from Ubuntu 20.04 to 22.04 the SSH login via a SSH
  pubkey to our servers fails, while password and kerberos are still
  working.

  $ssh user at server
  sign_and_send_pubkey: internal error: initial hostkey not recorded 

  This seem related to the bugreport at openssh:
  https://bugzilla.mindrot.org/show_bug.cgi?id=3406

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: openssh-server 1:8.9p1-3ubuntu0.1
  ProcVersionSignature: Ubuntu 5.15.0-76.83-generic 5.15.99
  Uname: Linux 5.15.0-76-generic x86_64
  ApportVersion: 2.20.11-0ubuntu82.5
  Architecture: amd64
  CasperMD5CheckResult: pass
  CloudArchitecture: x86_64
  CloudID: none
  CloudName: none
  CloudPlatform: none
  CloudSubPlatform: config
  Date: Thu Jul 20 17:25:01 2023
  InstallationDate: Installed on 2020-08-24 (1060 days ago)
  InstallationMedia: Ubuntu-Server 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
  SourcePackage: openssh
  UpgradeStatus: Upgraded to jammy on 2023-07-20 (0 days ago)

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