Issued:
2009-04-07
Updated:
2009-04-07

RHSA-2009:0410 - Critical: krb5 security update

Synopsis

Critical: krb5 security update

Type/Severity

Security Advisory Critical

Topic

Updated krb5 packages that fix a security issue are now available for Red Hat Enterprise Linux 2.1 and 3.

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

Description

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).

An input validation flaw was found in the ASN.1 (Abstract Syntax Notation One) decoder used by MIT Kerberos. A remote attacker could use this flaw to crash a network service using the MIT Kerberos library, such as kadmind or krb5kdc, by causing it to dereference or free an uninitialized pointer or, possibly, execute arbitrary code with the privileges of the user running the service. (CVE-2009-0846)

All krb5 users should upgrade to these updated packages, which contain a backported patch to correct this issue. All running services using the MIT Kerberos libraries must be restarted for the update to take effect.

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 This content is not included.http://kbase.redhat.com/faq/docs/DOC-11259

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for Power, big endian3ppc
Red Hat Enterprise Linux for IBM z Systems3s390x
Red Hat Enterprise Linux for IBM z Systems3s390
Red Hat Enterprise Linux Workstation3x86_64
Red Hat Enterprise Linux Workstation3ia64
Red Hat Enterprise Linux Workstation3i386
Red Hat Enterprise Linux Workstation2ia64
Red Hat Enterprise Linux Workstation2i386
Red Hat Enterprise Linux Server3x86_64
Red Hat Enterprise Linux Server3ia64
Red Hat Enterprise Linux Server3i386
Red Hat Enterprise Linux Server2ia64
Red Hat Enterprise Linux Server2i386
Red Hat Enterprise Linux Desktop3x86_64
Red Hat Enterprise Linux Desktop3i386

Updated Packages

  • krb5-workstation-1.2.7-70.ppc.rpm
  • krb5-devel-1.2.2-49.i386.rpm
  • krb5-server-1.2.7-70.s390.rpm
  • krb5-workstation-1.2.7-70.s390x.rpm
  • krb5-libs-1.2.7-70.s390x.rpm
  • krb5-devel-1.2.7-70.x86_64.rpm
  • krb5-server-1.2.2-49.ia64.rpm
  • krb5-server-1.2.7-70.i386.rpm
  • krb5-devel-1.2.7-70.i386.rpm
  • krb5-libs-1.2.2-49.i386.rpm
  • krb5-libs-1.2.7-70.i386.rpm
  • krb5-libs-1.2.7-70.x86_64.rpm
  • krb5-workstation-1.2.2-49.ia64.rpm
  • krb5-workstation-1.2.7-70.ia64.rpm
  • krb5-devel-1.2.7-70.s390.rpm
  • krb5-libs-1.2.7-70.s390.rpm
  • krb5-workstation-1.2.2-49.i386.rpm
  • krb5-devel-1.2.2-49.ia64.rpm
  • krb5-devel-1.2.7-70.ia64.rpm
  • krb5-libs-1.2.7-70.ppc.rpm
  • krb5-server-1.2.7-70.x86_64.rpm
  • krb5-libs-1.2.7-70.ppc64.rpm
  • krb5-server-1.2.7-70.ppc.rpm
  • krb5-devel-1.2.7-70.ppc.rpm
  • krb5-workstation-1.2.7-70.i386.rpm
  • krb5-libs-1.2.7-70.ia64.rpm
  • krb5-server-1.2.7-70.s390x.rpm
  • krb5-server-1.2.2-49.i386.rpm
  • krb5-libs-1.2.2-49.ia64.rpm
  • krb5-server-1.2.7-70.ia64.rpm
  • krb5-workstation-1.2.7-70.x86_64.rpm
  • krb5-workstation-1.2.7-70.s390.rpm
  • krb5-devel-1.2.7-70.s390x.rpm

Fixes

CVEs

References

Additional information