Bug#783594: openssh-server: sshd -T does not show actual kexchange and ciphers
Package: openssh-server
Version: 1:6.7p1-5
Followup-For: Bug #783594
Dear Maintainer,
The bug appears only if the Ciphers directive is missing and implied from program defaults:
(i'm guessing that -T runs prior to proper full initialization of 'sshd')
$ grep -i ciphers /etc/ssh/sshd_config
$
$ sudo /usr/sbin/sshd -T | grep -i ciphers
ciphers 3des-cbc,blowfish-cbc,cast128-cbc,arcfour,arcfour128,arcfour256,aes128-cbc,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,chacha20-poly1305@openssh.com
-or-
$ sudo /usr/sbin/sshd -f /dev/null -T | grep -i ciphers
ciphers 3des-cbc,blowfish-cbc,cast128-cbc,arcfour,arcfour128,arcfour256,aes128-cbc,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,chacha20-poly1305@openssh.com
If we explicitly specify the manpage defaults, '-T' functions as expected:
$ echo 'Ciphers aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,chacha20-poly1305@openssh.com' | sudo /usr/sbin/sshd -T -f /dev/stdin | grep ciphers
ciphers aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,chacha20-poly1305@openssh.com
-- System Information:
Debian Release: 8.2
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'proposed-updates'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 3.16.0-4-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US, LC_CTYPE=en_US (charmap=ISO-8859-1)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages openssh-server depends on:
ii adduser 3.113+nmu3
ii debconf [debconf-2.0] 1.5.56
ii dpkg 1.17.25
ii init-system-helpers 1.22
ii libc6 2.19-18+deb8u1
ii libcomerr2 1.42.12-1.1
ii libgssapi-krb5-2 1.12.1+dfsg-19+deb8u1
ii libkrb5-3 1.12.1+dfsg-19+deb8u1
ii libpam-modules 1.1.8-3.1
ii libpam-runtime 1.1.8-3.1
ii libpam0g 1.1.8-3.1
ii libselinux1 2.3-2
ii libssl1.0.0 1.0.1k-3+deb8u1
ii libwrap0 7.6.q-25
ii lsb-base 4.1+Debian13+nmu1
ii openssh-client 1:6.7p1-5
ii openssh-sftp-server 1:6.7p1-5
ii procps 2:3.3.9-9
ii zlib1g 1:1.2.8.dfsg-2+b1
Versions of packages openssh-server recommends:
ii ncurses-term 5.9+20140913-1
ii xauth 1:1.0.9-1
Versions of packages openssh-server suggests:
ii ksshaskpass [ssh-askpass] 0.5.3-1+b1
pn molly-guard <none>
pn monkeysphere <none>
pn rssh <none>
pn ufw <none>
-- debconf information excluded
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