openssh-server disconnects connecting clients immediately

[Paul White]

openssh-server accepts incoming connections but closes them immediately, "closed by remote host" is seen on the client.

I connected perfectly and reliably everytime when using version 6.1p1-4 and see this problem only after upgrading to 6.2p1-2. Downgrading the package allows a connection that isn't immediately terminated and upgrading re-introduces the problem.

 I have tested this with a standard sshd config file and my own customised version using a non-standard port.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: openssh-server 1:6.2p1-2
ProcVersionSignature: Ubuntu 3.9.0-1.5-generic 3.9.1
Uname: Linux 3.9.0-1-generic x86_64
ApportVersion: 2.10-0ubuntu3
Architecture: amd64
Date: Sun May 12 16:12:11 2013
InstallationDate: Installed on 2013-03-24 (49 days ago)
InstallationMedia: Xubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130324)
MarkForUpload: True
SourcePackage: openssh
UpgradeStatus: No upgrade log present (probably fresh install)