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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Critical: krb5 security update
Advisory ID:       RHSA-2008:0182-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2008-0182.html
Issue date:        2008-03-18
CVE Names:         CVE-2008-0062 CVE-2008-0063 
=====================================================================

1. Summary:

Updated krb5 packages that fix multiple security issues are now available
for Red Hat Enterprise Linux 4.5 Extended Update Support.

This update has been rated as having critical security impact by the Red
Hat Security Response Team.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS version 4.5.z - i386, ia64, ppc, s390, s390x,
 x86_64
Red Hat Enterprise Linux ES version 4.5.z - i386, ia64, x86_64

3. Description:

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.

A flaw was found in the way the MIT Kerberos Authentication Service and Key
Distribution Center server (krb5kdc) handled Kerberos v4 protocol packets.
An unauthenticated remote attacker could use this flaw to crash the
krb5kdc daemon, disclose portions of its memory, or possibly execute
arbitrary code using malformed or truncated Kerberos v4 protocol
requests. (CVE-2008-0062, CVE-2008-0063)

This issue only affected krb5kdc with Kerberos v4 protocol compatibility
enabled, which is the default setting on Red Hat Enterprise Linux 4.
Kerberos v4 protocol support can be disabled by adding "v4_mode=none"
(without the quotes) to the "[kdcdefaults]" section of
/var/kerberos/krb5kdc/kdc.conf.

Red Hat would like to thank MIT for reporting these issues.

All krb5 users are advised to update to these erratum packages which
contain backported fixes to correct these issues.

4. Solution:

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.

This update is available via Red Hat Network.  Details on how to use
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/FAQ_58_10188

5. Bugs fixed (http://bugzilla.redhat.com/):

432620 - CVE-2008-0062 krb5: uninitialized pointer use in krb5kdc
432621 - CVE-2008-0063 krb5: possible leak of sensitive data from krb5kdc using
 krb4 request

6. Package List:

Red Hat Enterprise Linux AS version 4.5.z:

Source:
krb5-1.3.4-49.el4_5.1.src.rpm

i386:
krb5-debuginfo-1.3.4-49.el4_5.1.i386.rpm
krb5-devel-1.3.4-49.el4_5.1.i386.rpm
krb5-libs-1.3.4-49.el4_5.1.i386.rpm
krb5-server-1.3.4-49.el4_5.1.i386.rpm
krb5-workstation-1.3.4-49.el4_5.1.i386.rpm

ia64:
krb5-debuginfo-1.3.4-49.el4_5.1.i386.rpm
krb5-debuginfo-1.3.4-49.el4_5.1.ia64.rpm
krb5-devel-1.3.4-49.el4_5.1.ia64.rpm
krb5-libs-1.3.4-49.el4_5.1.i386.rpm
krb5-libs-1.3.4-49.el4_5.1.ia64.rpm
krb5-server-1.3.4-49.el4_5.1.ia64.rpm
krb5-workstation-1.3.4-49.el4_5.1.ia64.rpm

ppc:
krb5-debuginfo-1.3.4-49.el4_5.1.ppc.rpm
krb5-debuginfo-1.3.4-49.el4_5.1.ppc64.rpm
krb5-devel-1.3.4-49.el4_5.1.ppc.rpm
krb5-libs-1.3.4-49.el4_5.1.ppc.rpm
krb5-libs-1.3.4-49.el4_5.1.ppc64.rpm
krb5-server-1.3.4-49.el4_5.1.ppc.rpm
krb5-workstation-1.3.4-49.el4_5.1.ppc.rpm

s390:
krb5-debuginfo-1.3.4-49.el4_5.1.s390.rpm
krb5-devel-1.3.4-49.el4_5.1.s390.rpm
krb5-libs-1.3.4-49.el4_5.1.s390.rpm
krb5-server-1.3.4-49.el4_5.1.s390.rpm
krb5-workstation-1.3.4-49.el4_5.1.s390.rpm

s390x:
krb5-debuginfo-1.3.4-49.el4_5.1.s390.rpm
krb5-debuginfo-1.3.4-49.el4_5.1.s390x.rpm
krb5-devel-1.3.4-49.el4_5.1.s390x.rpm
krb5-libs-1.3.4-49.el4_5.1.s390.rpm
krb5-libs-1.3.4-49.el4_5.1.s390x.rpm
krb5-server-1.3.4-49.el4_5.1.s390x.rpm
krb5-workstation-1.3.4-49.el4_5.1.s390x.rpm

x86_64:
krb5-debuginfo-1.3.4-49.el4_5.1.i386.rpm
krb5-debuginfo-1.3.4-49.el4_5.1.x86_64.rpm
krb5-devel-1.3.4-49.el4_5.1.x86_64.rpm
krb5-libs-1.3.4-49.el4_5.1.i386.rpm
krb5-libs-1.3.4-49.el4_5.1.x86_64.rpm
krb5-server-1.3.4-49.el4_5.1.x86_64.rpm
krb5-workstation-1.3.4-49.el4_5.1.x86_64.rpm

Red Hat Enterprise Linux ES version 4.5.z:

Source:
krb5-1.3.4-49.el4_5.1.src.rpm

i386:
krb5-debuginfo-1.3.4-49.el4_5.1.i386.rpm
krb5-devel-1.3.4-49.el4_5.1.i386.rpm
krb5-libs-1.3.4-49.el4_5.1.i386.rpm
krb5-server-1.3.4-49.el4_5.1.i386.rpm
krb5-workstation-1.3.4-49.el4_5.1.i386.rpm

ia64:
krb5-debuginfo-1.3.4-49.el4_5.1.i386.rpm
krb5-debuginfo-1.3.4-49.el4_5.1.ia64.rpm
krb5-devel-1.3.4-49.el4_5.1.ia64.rpm
krb5-libs-1.3.4-49.el4_5.1.i386.rpm
krb5-libs-1.3.4-49.el4_5.1.ia64.rpm
krb5-server-1.3.4-49.el4_5.1.ia64.rpm
krb5-workstation-1.3.4-49.el4_5.1.ia64.rpm

x86_64:
krb5-debuginfo-1.3.4-49.el4_5.1.i386.rpm
krb5-debuginfo-1.3.4-49.el4_5.1.x86_64.rpm
krb5-devel-1.3.4-49.el4_5.1.x86_64.rpm
krb5-libs-1.3.4-49.el4_5.1.i386.rpm
krb5-libs-1.3.4-49.el4_5.1.x86_64.rpm
krb5-server-1.3.4-49.el4_5.1.x86_64.rpm
krb5-workstation-1.3.4-49.el4_5.1.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://www.redhat.com/security/team/key/#package

7. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0062
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0063
http://www.redhat.com/security/updates/classification/#critical

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2008 Red Hat, Inc.
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