Bug 162482

Summary: CAN-2005-2069 openldap password disclosure issue
Product: Red Hat Enterprise Linux 4 Reporter: Josh Bressers <bressers>
Component: nss_ldapAssignee: Nalin Dahyabhai <nalin>
Status: CLOSED ERRATA QA Contact: Jay Turner <jturner>
Severity: medium Docs Contact:
Priority: medium    
Version: 4.0CC: fenlason, srevivo
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard: impact=moderate,public=20050628,source=vendorsec,reported=20050628
Fixed In Version: RHSA-2005-767 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2005-10-17 07:50:21 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Josh Bressers 2005-07-05 14:14:58 UTC 
+++ This bug was initially created as a clone of Bug #161990 +++

This information is from Rob Holland

Openldap currently doesn't allow a client to specify that referred
connections should use TLS. This can lead to passwords being sent in the
clear despite having "ssl start_tls" in ldap.conf.

In a master+slaves LDAP infrastructure passwords are sent in the clear
when a user runs "passwd" on a machine where pam_ldap is configured to
use a slave server.

pam_ldap connects to the slave over TLS (as specified in the ldap.conf
file) and then gets referred to the master in order to make a change.
TLS is never started on the referred connection and pam_ldap attempts to
bind in the clear. If the master server is not setup to require TLS on
all connections, this may go unoticed, as passwd will function as
normal.

The only place a client is able to try and start_tls for a referred
connection is inside rebind_proc. However, a bug in a sanity check in
the openldap code means that openldap considers that TLS has already
been started on the referrred connection if it has been started on the
first connection (it always checks the first connection, rather than
checking the default), and so this won't work.

Bugs have been filed on both openldap and pam_ldap:

http://www.openldap.org/its/index.cgi/Incoming?id=3791

http://bugzilla.padl.com/show_bug.cgi?id=210



This issue also affects nss_ldap, the patch is located here:
http://bugzilla.padl.com/show_bug.cgi?id=211
Comment 1 Josh Bressers 2005-07-05 14:15:57 UTC 
This issue may also affect RHEL2.1 and RHEL3
Comment 3 Red Hat Bugzilla 2005-10-17 07:36:18 UTC 
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2005-751.html
Comment 4 Red Hat Bugzilla 2005-10-17 07:50:21 UTC 
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2005-767.html