CentOS Errata and Security Advisory CESA-2007:0562
Kerberos is a network authentication system which allows clients and servers to authenticate to each other through use of symmetric encryption and a trusted third party, the KDC. kadmind is the KADM5 administration server.
David Coffey discovered an uninitialized pointer free flaw in the RPC library used by kadmind. On Red Hat Enterprise Linux 4 and 5, glibc detects attempts to free invalid pointers. A remote unauthenticated attacker who can access kadmind could trigger this flaw and cause kadmind to crash. (CVE-2007-2442)
David Coffey also discovered an overflow flaw in the RPC library used by kadmind. On Red Hat Enterprise Linux, exploitation of this flaw is limited to a denial of service. A remote unauthenticated attacker who can access kadmind could trigger this flaw and cause kadmind to crash. (CVE-2007-2443)
A stack buffer overflow flaw was found in kadmind. An authenticated attacker who can access kadmind could trigger this flaw and potentially execute arbitrary code on the Kerberos server. (CVE-2007-2798)
Users of krb5-server are advised to update to these erratum packages which contain backported fixes to correct these issues.
Merged security bulletin from advisories: http://lists.centos.org/pipermail/centos-announce/2007-June/013982.html http://lists.centos.org/pipermail/centos-announce/2007-June/013983.html http://lists.centos.org/pipermail/centos-announce/2007-June/013988.html http://lists.centos.org/pipermail/centos-announce/2007-June/013989.html http://lists.centos.org/pipermail/centos-announce/2007-June/014004.html http://lists.centos.org/pipermail/centos-announce/2007-June/014009.html
Affected packages: krb5 krb5-devel krb5-libs krb5-server krb5-workstation
Upstream details at: https://rhn.redhat.com/errata/RHSA-2007-0562.html