glsa-200612-19.xml


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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200612-19">
  <title>pam_ldap: Authentication bypass vulnerability</title>
  <synopsis>
    pam_ldap contains a vulnerability that may allow a remote user with a
    locked account to gain unauthorized system access.
  </synopsis>
  <product type="ebuild">pam_ldap</product>
  <announced>2006-12-20</announced>
  <revised count="01">2006-12-20</revised>
  <bug>153916</bug>
  <access>remote</access>
  <affected>
    <package name="sys-auth/pam_ldap" auto="yes" arch="*">
      <unaffected range="ge">183</unaffected>
      <vulnerable range="lt">183</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    pam_ldap is a Pluggable Authentication Module which allows
    authentication against LDAP directories.
    </p>
  </background>
  <description>
    <p>
    Steve Rigler discovered that pam_ldap does not correctly handle
    "PasswordPolicyResponse" control responses from an LDAP directory. This
    causes the pam_authenticate() function to always succeed, even if the
    previous authentication failed.
    </p>
  </description>
  <impact type="low">
    <p>
    A locked user may exploit this vulnerability to bypass the LDAP
    authentication mechanism, possibly gaining unauthorized access to the
    system.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time.
    </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-183"</code>
  </resolution>
  <references>
    <uri link="https://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5170">CVE-2006-5170</uri>
  </references>
  <metadata tag="submitter" timestamp="2006-12-19T16:57:27Z">
    falco
  </metadata>
  <metadata tag="bugReady" timestamp="2006-12-19T16:58:04Z">
    falco
  </metadata>
</glsa>