Bug#490883: openssh-server: logs some keys to /var/log/auth.log which is world readabl

[Witold Baryluk <baryluk@smp.if.uj.edu.pl>]

Package: openssh-server
Version: 1:4.3p2-9etch2
Severity: grave
Tags: security
Justification: user security hole

(orginal key removed)

Jul 13 15:55:34 tytus sshd[24909]: error: key_read: uudecode AAAAB3NzaC1XXXXXXXX
........XXXXXXXRvB4h==\n failed
Jul 13 15:55:36 tytus sshd[24909]: Accepted password for johnybravo from 10.0.1.1 port
 49186 ssh2


Ok, key have error, but it is probably one letter, or some whitespaces.
Ok, it is public key, but sshd shouldn't log it anyway.


-- System Information:
Debian Release: 4.0
  APT prefers stable
  APT policy: (1001, 'stable')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.18-6-686
Locale: LANG=pl_PL.UTF-8, LC_CTYPE=pl_PL.UTF-8 (charmap=UTF-8)

Versions of packages openssh-server depends on:
ii  add 3.102                                Add and remove users and groups
ii  deb 1.5.11etch1                          Debian configuration management sy
ii  dpk 1.13.25                              package maintenance system for Deb
ii  lib 2.3.6.ds1-13etch5                    GNU C Library: Shared libraries
ii  lib 1.39+1.40-WIP-2006.11.14+dfsg-2etch1 common error description library
ii  lib 1.4.4-7etch5                         MIT Kerberos runtime libraries
ii  lib 0.79-5                               Pluggable Authentication Modules f
ii  lib 0.79-5                               Runtime support for the PAM librar
ii  lib 0.79-5                               Pluggable Authentication Modules l
ii  lib 1.32-3                               SELinux shared libraries
ii  lib 0.9.8c-4etch3                        SSL shared libraries
ii  lib 7.6.dbs-13                           Wietse Venema's TCP wrappers libra
ii  ope 0.1.1                                list of blacklisted OpenSSH RSA an
ii  ope 1:4.3p2-9etch2                       Secure shell client, an rlogin/rsh
ii  zli 1:1.2.3-13                           compression library - runtime

openssh-server recommends no packages.

-- debconf information:
* ssh/vulnerable_host_keys:
  ssh/new_config: true
* ssh/use_old_init_script: true
  ssh/encrypted_host_key_but_no_keygen:
  ssh/disable_cr_auth: false