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Gentoo Linux Security Advisory GLSA 200409-09 |
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http://security.gentoo.org/ |
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Severity: High |
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Title: MIT krb5: Multiple vulnerabilities |
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Date: September 06, 2004 |
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Bugs: #62417 |
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ID: 200409-09 |
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Synopsis |
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======== |
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|
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MIT krb5 contains several double-free vulnerabilities, potentially |
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allowing the execution of arbitrary code, as well as a denial of |
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service vulnerability. |
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Background |
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========== |
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|
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MIT krb5 is the free implementation of the Kerberos network |
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authentication protocol by the Massachusetts Institute of Technology. |
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Affected packages |
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================= |
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|
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------------------------------------------------------------------- |
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Package / Vulnerable / Unaffected |
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------------------------------------------------------------------- |
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1 app-crypt/mit-krb5 < 1.3.4 >= 1.3.4 |
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Description |
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=========== |
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|
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The implementation of the Key Distribution Center (KDC) and the MIT |
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krb5 library contain double-free vulnerabilities, making client |
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programs as well as application servers vulnerable. |
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|
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The ASN.1 decoder library is vulnerable to a denial of service attack, |
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including the KDC. |
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Impact |
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====== |
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|
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The double-free vulnerabilities could allow an attacker to execute |
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arbitrary code on a KDC host and hosts running krb524d or vulnerable |
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services. In the case of a KDC host, this can lead to a compromise of |
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the entire Kerberos realm. Furthermore, an attacker impersonating a |
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legitimate KDC or application server can potentially execute arbitrary |
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code on authenticating clients. |
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|
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An attacker can cause a denial of service for a KDC or application |
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server and clients, the latter if impersonating a legitimate KDC or |
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application server. |
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Workaround |
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========== |
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There is no known workaround at this time. |
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Resolution |
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========== |
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All mit-krb5 users should upgrade to the latest stable version: |
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# emerge sync |
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# emerge -pv ">=app-crypt/mit-krb5-1.3.4" |
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# emerge ">=app-crypt/mit-krb5-1.3.4" |
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|
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References |
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========== |
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[ 1 ] MIT krb5 Security Advisory 2004-002 |
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http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2004-002-dblfree.txt |
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[ 2 ] MIT krb5 Security Advisory 2004-003 |
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http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2004-003-asn1.txt |
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[ 3 ] CAN-2004-0642 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0642 |
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[ 4 ] CAN-2004-0643 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0643 |
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[ 5 ] CAN-2004-0644 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0644 |
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[ 6 ] CAN-2004-0772 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0772 |
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|
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Availability |
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============ |
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This GLSA and any updates to it are available for viewing at |
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the Gentoo Security Website: |
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http://security.gentoo.org/glsa/glsa-200409-09.xml |
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Concerns? |
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========= |
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Security is a primary focus of Gentoo Linux and ensuring the |
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confidentiality and security of our users machines is of utmost |
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importance to us. Any security concerns should be addressed to |
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security@g.o or alternatively, you may file a bug at |
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http://bugs.gentoo.org. |
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License |
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======= |
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|
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Copyright 2004 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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The contents of this document are licensed under the |
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Creative Commons - Attribution / Share Alike license. |
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http://creativecommons.org/licenses/by-sa/1.0 |
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