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<?xml version="1.0" encoding="utf-8"?>
<glsa id="200406-21">
<title>mit-krb5: Multiple buffer overflows in krb5_aname_to_localname</title>
mit-krb5 contains multiple buffer overflows in the function
krb5_aname_to_localname(). This could potentially lead to a complete remote
system compromise.
<product type="ebuild">mit-krb5</product>
<announced>June 29, 2004</announced>
<revised>June 29, 2004: 01</revised>
<package name="app-crypt/mit-krb5" auto="yes" arch="*">
<unaffected range="ge">1.3.3-r1</unaffected>
<vulnerable range="le">1.3.3</vulnerable>
mit-krb5 is the free implementation of the Kerberos network authentication
protocol by the Massachusetts Institute of Technology.
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.
With explicit mapping enabled, an attacker must authenticate using a
principal name listed in the explicit mapping list.
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.
<impact type="high">
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.
There is no known workaround at this time. All users are encouraged to
upgrade to the latest available version.
mit-krb5 users should upgrade to the latest version:
# emerge sync
# emerge -pv ">=app-crypt/mit-krb5-1.3.3-r1"
# emerge ">=app-crypt/mit-krb5-1.3.3-r1"</code>
<uri link="">CAN-2004-0523</uri>
<uri link="">MIT krb5 Security Advisory</uri>
<metadata tag="submitter">