From owner-freebsd-security@FreeBSD.ORG  Thu Aug 29 00:46:39 2013
Return-Path: <owner-freebsd-security@FreeBSD.ORG>
Delivered-To: freebsd-security@FreeBSD.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTP id AC85AC83
 for <freebsd-security@FreeBSD.org>; Thu, 29 Aug 2013 00:46:39 +0000 (UTC)
 (envelope-from slw@zxy.spb.ru)
Received: from zxy.spb.ru (zxy.spb.ru [195.70.199.98])
 by mx1.freebsd.org (Postfix) with ESMTP id 6CDCC24AA
 for <freebsd-security@FreeBSD.org>; Thu, 29 Aug 2013 00:46:39 +0000 (UTC)
Received: from slw by zxy.spb.ru with local (Exim 4.69 (FreeBSD))
 (envelope-from <slw@zxy.spb.ru>) id 1VEqPk-000IQZ-AQ
 for freebsd-security@FreeBSD.org; Thu, 29 Aug 2013 04:48:44 +0400
Date: Thu, 29 Aug 2013 04:48:44 +0400
From: Slawa Olhovchenkov <slw@zxy.spb.ru>
To: freebsd-security@FreeBSD.org
Subject: OpenSSH, PAM and kerberos
Message-ID: <20130829004844.GA70584@zxy.spb.ru>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
User-Agent: Mutt/1.5.21 (2010-09-15)
X-SA-Exim-Connect-IP: <locally generated>
X-SA-Exim-Mail-From: slw@zxy.spb.ru
X-SA-Exim-Scanned: No (on zxy.spb.ru); SAEximRunCond expanded to false
X-BeenThere: freebsd-security@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: "Security issues \[members-only posting\]"
 <freebsd-security.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-security>, 
 <mailto:freebsd-security-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-security>
List-Post: <mailto:freebsd-security@freebsd.org>
List-Help: <mailto:freebsd-security-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-security>, 
 <mailto:freebsd-security-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 29 Aug 2013 00:46:39 -0000

I am try to setup single sign-on and found this is imposuble due to
bug in OpenSSH: currently sshd do pam_authenticate() and
pam_acct_mgmt() from child process, but pam_setcred() from paren
proccess. pam_krb5 in pam_sm_setcred() required information from
pam_sm_authenticate and can't work corretly (can't create
/tmp/krb5cc_NNNN, can't set envirompent KRB5CCNAME and so).

In logs/debugs this is as 

openpam_dispatch(): pam_krb5.so: pam_sm_setcred(): failed to retrieve user credentials