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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200507-13">
<title>pam_ldap and nss_ldap: Plain text authentication leak</title>
<synopsis>
pam_ldap and nss_ldap fail to restart TLS when following a referral,
possibly leading to credentials being sent in plain text.
</synopsis>
<product type="ebuild">pam_ldap nss_ldap</product>
<announced>July 14, 2005</announced>
<revised>July 14, 2005: 01</revised>
<bug>96767</bug>
<access>remote</access>
<affected>
<package name="sys-auth/nss_ldap" auto="yes" arch="*">
<unaffected range="ge">239-r1</unaffected>
<unaffected range="rge">226-r1</unaffected>
<vulnerable range="lt">239-r1</vulnerable>
</package>
<package name="sys-auth/pam_ldap" auto="yes" arch="*">
<unaffected range="ge">178-r1</unaffected>
<vulnerable range="lt">178-r1</vulnerable>
</package>
</affected>
<background>
<p>
pam_ldap is a Pluggable Authentication Module which allows
authentication against an LDAP directory. nss_ldap is a Name Service
Switch module which allows 'passwd', 'group' and 'host' database
information to be pulled from LDAP. TLS is Transport Layer Security, a
protocol that allows encryption of network communications.
</p>
</background>
<description>
<p>
Rob Holland of the Gentoo Security Audit Team discovered that
pam_ldap and nss_ldap fail to use TLS for referred connections if they
are referred to a master after connecting to a slave, regardless of the
"ssl start_tls" ldap.conf setting.
</p>
</description>
<impact type="normal">
<p>
An attacker could sniff passwords or other sensitive information
as the communication is not encrypted.
</p>
</impact>
<workaround>
<p>
pam_ldap and nss_ldap can be set to force the use of SSL instead
of TLS.
</p>
</workaround>
<resolution>
<p>
All pam_ldap users should upgrade to the latest version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose ">=sys-auth/pam_ldap-178-r1"</code>
<p>
All nss_ldap users should upgrade to the latest version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose sys-auth/nss_ldap</code>
</resolution>
<references>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2069">CAN-2005-2069</uri>
</references>
<metadata tag="requester" timestamp="Mon, 04 Jul 2005 08:55:26 +0000">
tigger
</metadata>
<metadata tag="submitter" timestamp="Mon, 04 Jul 2005 14:18:57 +0000">
tigger
</metadata>
<metadata tag="bugReady" timestamp="Thu, 14 Jul 2005 09:08:58 +0000">
koon
</metadata>
</glsa>
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