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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200508-22">
<title>pam_ldap: Authentication bypass vulnerability</title>
<synopsis>
pam_ldap contains a vulnerability that may allow a remote attacker to gain
system access.
</synopsis>
<product type="ebuild">pam_ldap</product>
<announced>August 31, 2005</announced>
<revised>August 31, 2005: 01</revised>
<bug>103659</bug>
<access>remote</access>
<affected>
<package name="sys-auth/pam_ldap" auto="yes" arch="*">
<unaffected range="ge">180</unaffected>
<vulnerable range="lt">180</vulnerable>
</package>
</affected>
<background>
<p>
pam_ldap is a Pluggable Authentication Module which allows
authentication against LDAP directories.
</p>
</background>
<description>
<p>
When a pam_ldap client attempts to authenticate against an LDAP
server that omits the optional error value from the
PasswordPolicyResponseValue, the authentication attempt will always
succeed.
</p>
</description>
<impact type="normal">
<p>
A remote attacker may exploit this vulnerability to bypass the
LDAP authentication mechanism, gaining access to the system possibly
with elevated privileges.
</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 &quot;&gt;=sys-auth/pam_ldap-180&quot;</code>
</resolution>
<references>
<uri link="http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2641">CAN-2005-2641</uri>
<uri link="http://www.kb.cert.org/vuls/id/778916">US-CERT VU#778916</uri>
</references>
<metadata tag="requester" timestamp="Mon, 29 Aug 2005 14:50:51 +0000">
koon
</metadata>
<metadata tag="bugReady" timestamp="Mon, 29 Aug 2005 14:51:34 +0000">
koon
</metadata>
<metadata tag="submitter" timestamp="Mon, 29 Aug 2005 20:08:30 +0000">
adir
</metadata>
</glsa>