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Multiple PAM vulnerabilities in portable OpenSSH
Sep 23 2003 12:40PM
Damien Miller (djm cvs openbsd 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
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.
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