Scientific Linux 6.x Moderate: krb5 KDC Authentication Flaw

Date: Thu, 8 Dec 2011 17:07:09 -0600
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Sender: Security Errata for Scientific Linux
 
From: Pat Riehecky 
Subject: Security ERRATA Moderate: krb5 on SL6.x i386/x86_64
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Synopsis: Moderate: krb5 security update
Issue Date: 2011-12-06
CVE Numbers: CVE-2011-1530

Kerberos is a network authentication system which allows clients and
servers to authenticate to each other using symmetric encryption and a
trusted third-party, the Key Distribution Center (KDC).

A NULL pointer dereference flaw was found in the way the MIT Kerberos KDC
processed certain TGS (Ticket-granting Server) requests. A remote,
authenticated attacker could use this flaw to crash the KDC via a
specially-crafted TGS request. (CVE-2011-1530)

All krb5 users should upgrade to these updated packages, which contain a
backported patch to correct this issue. After installing the updated
packages, the krb5kdc daemon will be restarted automatically.

SL6:
 i386
 krb5-debuginfo-1.9-22.el6_2.1.i686.rpm
 krb5-devel-1.9-22.el6_2.1.i686.rpm
 krb5-libs-1.9-22.el6_2.1.i686.rpm
 krb5-pkinit-openssl-1.9-22.el6_2.1.i686.rpm
 krb5-server-1.9-22.el6_2.1.i686.rpm
 krb5-server-ldap-1.9-22.el6_2.1.i686.rpm
 krb5-workstation-1.9-22.el6_2.1.i686.rpm
 x86_64
 krb5-debuginfo-1.9-22.el6_2.1.i686.rpm
 krb5-debuginfo-1.9-22.el6_2.1.x86_64.rpm
 krb5-devel-1.9-22.el6_2.1.i686.rpm
 krb5-devel-1.9-22.el6_2.1.x86_64.rpm
 krb5-libs-1.9-22.el6_2.1.i686.rpm
 krb5-libs-1.9-22.el6_2.1.x86_64.rpm
 krb5-pkinit-openssl-1.9-22.el6_2.1.x86_64.rpm
 krb5-server-1.9-22.el6_2.1.x86_64.rpm
 krb5-server-ldap-1.9-22.el6_2.1.i686.rpm
 krb5-server-ldap-1.9-22.el6_2.1.x86_64.rpm
 krb5-workstation-1.9-22.el6_2.1.x86_64.rpm

- Scientific Linux Development Team