CentOS Errata and Security Advisory CESA-2013:0942
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).
It was found that kadmind's kpasswd service did not perform any validation on incoming network packets, causing it to reply to all requests. A remote attacker could use this flaw to send spoofed packets to a kpasswd service that appear to come from kadmind on a different server, causing the services to keep replying packets to each other, consuming network bandwidth and CPU. (CVE-2002-2443)
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 and kadmind daemons will be restarted automatically.
Merged security bulletin from advisories: http://lists.centos.org/pipermail/centos-announce/2013-June/031823.html http://lists.centos.org/pipermail/centos-announce/2013-June/031824.html
Affected packages: krb5 krb5-devel krb5-libs krb5-pkinit-openssl krb5-server krb5-server-ldap krb5-workstation
Upstream details at: https://rhn.redhat.com/errata/RHSA-2013-0942.html