Date: Tue, 23 Sep 2003 06:40:25 -0600 (MDT)
From: Damien Miller <djm@cvs.openbsd.org.>
To: openssh-unix-announce@mindrot.org
Subject: Multiple PAM vulnerabilities in portable OpenSSH
Cc: announce@openbsd.org, bugtraq@securityfocus.com, lwn@lwn.net,
misc@openbsd.org, news@linuxsecurity.com, openssh-unix-dev@mindrot.org,
pab@ct.heise.de, secureshell@securityfocus.com, technik@genua.de,
timothy@monkey.org, webmaster@deadly.org
Subject: Portable OpenSSH Security Advisory: sshpam.adv
This document can be found at: http://www.openssh.com/txt/sshpam.adv
1. Versions affected:
Portable OpenSSH versions 3.7p1 and 3.7.1p1 contain multiple
vulnerabilities in the new PAM code. At least one of these bugs
is remotely exploitable (under a non-standard configuration,
with privsep disabled).
The OpenBSD releases of OpenSSH do not contain this code and
are not vulnerable. Older versions of portable OpenSSH are not
vulnerable.
2. Solution:
Upgrade to Portable OpenSSH 3.7.1p2 or disable PAM
support ("UsePam no" in sshd_config).
Due to complexity, inconsistencies in the specification and
differences between vendors' PAM implementations we recommend
that PAM be left disabled in sshd_config unless there is a need
for its use. Sites only using public key or simple password
authentication usually have little need to enable PAM support.
