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