glsa-200507-13.xml


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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>2005-07-14</announced>
  <revised count="01">2005-07-14</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 "&gt;=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="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2069">CAN-2005-2069</uri>
  </references>
  <metadata tag="requester" timestamp="2005-07-04T08:55:26Z">
    tigger
  </metadata>
  <metadata tag="submitter" timestamp="2005-07-04T14:18:57Z">
    tigger
  </metadata>
  <metadata tag="bugReady" timestamp="2005-07-14T09:08:58Z">
    koon
  </metadata>
</glsa>