Notes |
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(0005046)
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yann
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2008-01-02 19:05
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Please:
- send me your sshd_config and your /etc/pam.conf file
- the output of \"uname -p\", \"uname -r\", \"pkginfo -l CSWossh CSWosslrt\"
- set sshd to use PAM, \"truss -f -o /tmp/sshd.truss -p PID_OF_THE_SSHD_DAEMON\", try to login with ssh to reproduce your bug then send me the sshd.truss file. |
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(0005047)
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yann
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2008-01-02 19:09
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(0005048)
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fathead
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2008-01-02 19:27
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sshd_config
# $OpenBSD: sshd_config,v 1.68 2003/12/29 16:39:50 millert Exp $
# This is the sshd server system-wide configuration file. See
# sshd_config(5) for more information.
# This sshd was compiled with PATH=/opt/csw/bin:/usr/bin:/usr/sbin:/usr/ccs/bin:/usr/local/bin
# The strategy used for options in the default sshd_config shipped with
# OpenSSH is to specify options with their default value where
# possible, but leave them commented. Uncommented options change a
# default value.
#Port 22
#Protocol 2,1
Protocol 2
#ListenAddress 0.0.0.0
#ListenAddress ::
# HostKey for protocol version 1
#HostKey /opt/csw/etc/ssh_host_key
# HostKeys for protocol version 2
#HostKey /opt/csw/etc/ssh_host_rsa_key
#HostKey /opt/csw/etc/ssh_host_dsa_key
# Lifetime and size of ephemeral version 1 server key
#KeyRegenerationInterval 1h
#ServerKeyBits 768
# Logging
#obsoletes QuietMode and FascistLogging
SyslogFacility auth
LogLevel info
# Authentication:
#LoginGraceTime 2m
#PermitRootLogin yes
#StrictModes yes
#RSAAuthentication yes
#PubkeyAuthentication yes
#AuthorizedKeysFile .ssh/authorized_keys
# For this to work you will also need host keys in /opt/csw/etc/ssh_known_hosts
#RhostsRSAAuthentication no
# similar for protocol version 2
#HostbasedAuthentication no
# Change to yes if you don\'t trust ~/.ssh/known_hosts for
# RhostsRSAAuthentication and HostbasedAuthentication
#IgnoreUserKnownHosts no
# Don\'t read the user\'s ~/.rhosts and ~/.shosts files
#IgnoreRhosts yes
# To disable tunneled clear text passwords, change to no here!
#PasswordAuthentication yes
#PermitEmptyPasswords no
# Change to no to disable s/key passwords
#ChallengeResponseAuthentication yes
# Kerberos options
#KerberosAuthentication no
#KerberosOrLocalPasswd yes
#KerberosTicketCleanup yes
#KerberosGetAFSToken no
# GSSAPI options
#GSSAPIAuthentication no
#GSSAPICleanupCredentials yes
# Set this to \'yes\' to enable PAM authentication, account processing,
# and session processing. If this is enabled, PAM authentication will
# be allowed through the ChallengeResponseAuthentication mechanism.
# Depending on your PAM configuration, this may bypass the setting of
# PasswordAuthentication, PermitEmptyPasswords, and
# \"PermitRootLogin without-password\". If you just want the PAM account and
# session checks to run without PAM authentication, then enable this but set
# ChallengeResponseAuthentication=no
UsePAM yes
#AllowTcpForwarding yes
#GatewayPorts no
#X11Forwarding no
X11Forwarding yes
#X11DisplayOffset 10
#X11UseLocalhost yes
#PrintMotd yes
PrintMotd no
#PrintLastLog yes
#TCPKeepAlive yes
#UseLogin no
#UsePrivilegeSeparation yes
#PermitUserEnvironment no
#Compression yes
#ClientAliveInterval 0
#ClientAliveCountMax 3
#UseDNS yes
#PidFile /var/run/sshd.pid
#MaxStartups 10
# no default banner path
#Banner /some/path
# override default of no subsystems
Subsystem sftp /opt/csw/libexec/sftp-server
**********************************************************************
/etc/pam.comf
#
#ident \"@(#)pam.conf 1.29 07/04/10 SMI\"
#
# Copyright 2007 Sun Microsystems, Inc. All rights reserved.
# Use is subject to license terms.
#
# PAM configuration
#
# Unless explicitly defined, all services use the modules
# defined in the \"other\" section.
#
# Modules are defined with relative pathnames, i.e., they are
# relative to /usr/lib/security/$ISA. Absolute path names, as
# present in this file in previous releases are still acceptable.
#
# Authentication management
#
# login service (explicit because of pam_dial_auth)
#
login auth requisite pam_authtok_get.so.1
login auth required pam_dhkeys.so.1
login auth required pam_unix_cred.so.1
login auth required pam_unix_auth.so.1
login auth required pam_dial_auth.so.1
#
# rlogin service (explicit because of pam_rhost_auth)
#
rlogin auth sufficient pam_rhosts_auth.so.1
rlogin auth requisite pam_authtok_get.so.1
rlogin auth required pam_dhkeys.so.1
rlogin auth required pam_unix_cred.so.1
rlogin auth required pam_unix_auth.so.1
#
# Kerberized rlogin service
#
#krlogin auth required pam_unix_cred.so.1
#krlogin auth required pam_krb5.so.1
#
# sshd service
#
sshd auth required pam_authtok_get.so.1 debug
sshd auth required pam_dhkeys.so.1
sshd auth sufficient pam_unix_auth.so.1
sshd auth required pam_ldap.so.1 use_first_pass debug
#
# rsh service (explicit because of pam_rhost_auth,
# and pam_unix_auth for meaningful pam_setcred)
#
rsh auth sufficient pam_rhosts_auth.so.1
rsh auth required pam_unix_cred.so.1
#
# Kerberized rsh service
#
#krsh auth required pam_unix_cred.so.1
#krsh auth required pam_krb5.so.1
#
# Kerberized telnet service
#
#ktelnet auth required pam_unix_cred.so.1
#ktelnet auth required pam_krb5.so.1
#
# PPP service (explicit because of pam_dial_auth)
#
ppp auth requisite pam_authtok_get.so.1
ppp auth required pam_dhkeys.so.1
ppp auth required pam_unix_cred.so.1
ppp auth required pam_unix_auth.so.1
ppp auth required pam_dial_auth.so.1
#
# Default definitions for Authentication management
# Used when service name is not explicitly mentioned for authentication
#
other auth requisite pam_authtok_get.so.1
other auth required pam_dhkeys.so.1
other auth required pam_unix_cred.so.1
other auth required pam_unix_auth.so.1
#
# passwd command (explicit because of a different authentication module)
#
passwd auth required pam_passwd_auth.so.1
#
# cron service (explicit because of non-usage of pam_roles.so.1)
#
cron account required pam_unix_account.so.1
#
# Default definition for Account management
# Used when service name is not explicitly mentioned for account management
#
other account requisite pam_roles.so.1
other account required pam_unix_account.so.1
other account required pam_ldap.so.1 use_first_pass
#
# Default definition for Session management
# Used when service name is not explicitly mentioned for session management
#
other session required pam_unix_session.so.1
#
# Default definition for Password management
# Used when service name is not explicitly mentioned for password management
#
other password required pam_dhkeys.so.1
other password requisite pam_authtok_get.so.1
other password requisite pam_authtok_check.so.1
other password required pam_authtok_store.so.1
#
# Support for Kerberos V5 authentication and example configurations can
# be found in the pam_krb5(5) man page under the \"EXAMPLES\" section.
#
************************************************************************
bash-3.2# pkginfo -l CSWossh CSWosslrt
PKGINST: CSWossh
NAME: openssh - OpenSSH Secure Shell
CATEGORY: application
ARCH: sparc
VERSION: 4.7,REV=2007.12.18_rev=p1
BASEDIR: /
VENDOR: ftp://ftp.openbsd.org/pub/OpenBSD/OpenSSH/portable/ [^] packaged for CSW by Yann Rouillard
PSTAMP: yann@osiris-20071218155922
INSTDATE: Jan 02 2008 16:09
HOTLINE: http://www.blastwave.org/bugtrack/ [^]
EMAIL: yann@blastwave.org
STATUS: completely installed
FILES: 43 installed pathnames
6 shared pathnames
10 directories
14 executables
1 setuid/setgid executables
6016 blocks used (approx)
PKGINST: CSWosslrt
NAME: openssl_rt - Openssl runtime libraries
CATEGORY: application
ARCH: sparc
VERSION: 0.9.8,REV=2007.11.02_rev=g
BASEDIR: /
VENDOR: http://www.openssl.org/source/ [^] packaged for CSW by Yann Rouillard
PSTAMP: yann@ra-20071102150816
INSTDATE: Dec 30 2007 13:00
HOTLINE: http://www.blastwave.org/bugtrack/ [^]
EMAIL: yann@blastwave.org
STATUS: completely installed
FILES: 82 installed pathnames
6 directories
21 executables
29782 blocks used (approx)
bash-3.2#
**********************************************************************
bash-3.2# uname -p
sparc
bash-3.2# uname -r
5.10
**********************************************************************
truss file emailed. |
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(0005058)
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yann
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2008-01-03 19:31
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Could you add:
sshd auth required pam_unix_cred.so.1
in your pam.conf file.
It should look like this:
sshd auth requisite pam_authtok_get.so.1
sshd auth required pam_dhkeys.so.1
sshd auth required pam_unix_cred.so.1
sshd auth sufficient pam_unix_auth.so.1
sshd auth required pam_ldap.so.1 use_first_pass debug
Tell me if pam works with this setting. |
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(0005063)
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yann
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2008-01-04 19:35
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I was able to reproduce your bug with the following sshd pam settings:
sshd auth requisite pam_authtok_get.so.1
sshd auth required pam_dhkeys.so.1
sshd auth required pam_unix_auth.so.1
These settings work with openssh-4.6,REV=2007.08.24_rev=p1 but not with openssh-4.7,REV=2007.12.18_rev=p1
I tracked this bug to the following change between 4.6 and 4.7:
20070813
- (dtucker) [session.c] Bug 0001339: ensure that pam_setcred() is always
called with PAM_ESTABLISH_CRED at least once, which resolves a problem
with pam_dhkeys. Patch from David Leonard, ok djm@
which is linked to the following bug: https://bugzilla.mindrot.org/show_bug.cgi?id=1339 [^]
From what I read, I think your sshd pam settings were wrong and worked before because openssh didn\'t use the pam cred functions appropriately.
You should have stacked the pam_unix_cred module in your sshd pam configuration.
Can you confirm your problem is solved by adding this module (as explained in my previous bugnote) ?
Is there any reason you didn\'t use this module ? |
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(0005077)
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fathead
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2008-01-07 13:25
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The addition to the pam.conf made the difference. I was not aware of the missing line and I am grateful for the update.
Thank you for your time!! |
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(0005078)
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yann
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2008-01-07 14:30
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I am glad your problem is fixed.
I will then close this bug. |
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