You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

74 lines
2.5 KiB

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200406-21">
<title>mit-krb5: Multiple buffer overflows in krb5_aname_to_localname</title>
<synopsis>
mit-krb5 contains multiple buffer overflows in the function
krb5_aname_to_localname(). This could potentially lead to a complete remote
system compromise.
</synopsis>
<product type="ebuild">mit-krb5</product>
<announced>2004-06-29</announced>
<revised count="01">2004-06-29</revised>
<bug>52744</bug>
<access>remote</access>
<affected>
<package name="app-crypt/mit-krb5" auto="yes" arch="*">
<unaffected range="ge">1.3.3-r1</unaffected>
<vulnerable range="le">1.3.3</vulnerable>
</package>
</affected>
<background>
<p>
mit-krb5 is the free implementation of the Kerberos network authentication
protocol by the Massachusetts Institute of Technology.
</p>
</background>
<description>
<p>
The library function krb5_aname_to_localname() contains multiple buffer
overflows. This is only exploitable if explicit mapping or rules-based
mapping is enabled. These are not enabled as default.
</p>
<p>
With explicit mapping enabled, an attacker must authenticate using a
principal name listed in the explicit mapping list.
</p>
<p>
With rules-based mapping enabled, an attacker must first be able to create
arbitrary principal names either in the local realm Kerberos realm or in a
remote realm from which the local realm's service are reachable by
cross-realm authentication.
</p>
</description>
<impact type="high">
<p>
An attacker could use these vulnerabilities to execute arbitrary code with
the permissions of the user running mit-krb5, which could be the root user.
</p>
</impact>
<workaround>
<p>
There is no known workaround at this time. All users are encouraged to
upgrade to the latest available version.
</p>
</workaround>
<resolution>
<p>
mit-krb5 users should upgrade to the latest version:
</p>
<code>
# emerge sync
# emerge -pv "&gt;=app-crypt/mit-krb5-1.3.3-r1"
# emerge "&gt;=app-crypt/mit-krb5-1.3.3-r1"</code>
</resolution>
<references>
<uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0523">CAN-2004-0523</uri>
<uri link="http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2004-001-an_to_ln.txt">MIT krb5 Security Advisory</uri>
</references>
<metadata tag="submitter">
jaervosz
</metadata>
</glsa>