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Gentoo Linux Security Advisory GLSA 200904-09 |
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http://security.gentoo.org/ |
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Severity: High |
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Title: MIT Kerberos 5: Multiple vulnerabilities |
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Date: April 08, 2009 |
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Bugs: #262736, #263398 |
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ID: 200904-09 |
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Synopsis |
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======== |
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|
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Multiple vulnerabilites in MIT Kerberos 5 might allow remote |
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unauthenticated users to execute arbitrary code with root privileges. |
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|
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Background |
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========== |
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|
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MIT Kerberos 5 is a suite of applications that implement the Kerberos |
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network protocol. kadmind is the MIT Kerberos 5 administration daemon, |
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KDC is the Key Distribution Center. |
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|
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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 < 1.6.3-r6 >= 1.6.3-r6 |
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|
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Description |
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=========== |
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|
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Multiple vulnerabilities have been reported in MIT Kerberos 5: |
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|
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* A free() call on an uninitialized pointer in the ASN.1 decoder when |
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decoding an invalid encoding (CVE-2009-0846). |
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|
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* A buffer overread in the SPNEGO GSS-API application, reported by |
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Apple Product Security (CVE-2009-0844). |
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|
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* A NULL pointer dereference in the SPNEGO GSS-API application, |
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reported by Richard Evans (CVE-2009-0845). |
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|
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* An incorrect length check inside an ASN.1 decoder leading to |
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spurious malloc() failures (CVE-2009-0847). |
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|
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Impact |
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====== |
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|
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A remote unauthenticated attacker could exploit the first vulnerability |
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to cause a Denial of Service or, in unlikely circumstances, execute |
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arbitrary code on the host running krb5kdc or kadmind with root |
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privileges and compromise the Kerberos key database. Exploitation of |
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the other vulnerabilities might lead to a Denial of Service in kadmind, |
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krb5kdc, or other daemons performing authorization against Kerberos |
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that utilize GSS-API or an information disclosure. |
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|
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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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|
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Resolution |
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========== |
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|
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All MIT Kerberos 5 users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=app-crypt/mit-krb5-1.6.3-r6" |
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|
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References |
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========== |
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|
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[ 1 ] CVE-2009-0844 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0844 |
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[ 2 ] CVE-2009-0845 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0845 |
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[ 3 ] CVE-2009-0846 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0846 |
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[ 4 ] CVE-2009-0847 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0847 |
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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-200904-09.xml |
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|
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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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|
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License |
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======= |
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Copyright 2009 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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|
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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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|
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http://creativecommons.org/licenses/by-sa/2.5 |
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