RHSA-2011:1852Critical

Red Hat Security Advisory: krb5-appl security update

Published
December 27, 2011
Last Modified
June 27, 2026

🔗 CVE IDs covered (1)

CVE-2011-4862 →

📋 Description

CVE-2011-4862 — krb5: telnet client and server encrypt_keyid heap-based buffer overflow

🎯 Affected products35

  • Red Hat Enterprise Linux Desktop (v. 6)
  • Red Hat Enterprise Linux HPC Node (v. 6)
  • Red Hat Enterprise Linux Server (v. 6)
  • Red Hat Enterprise Linux Workstation (v. 6)
  • krb5-appl-0:1.0.1-7.el6_2.src as a component of Red Hat Enterprise Linux Desktop (v. 6)
  • krb5-appl-0:1.0.1-7.el6_2.src as a component of Red Hat Enterprise Linux HPC Node (v. 6)
  • krb5-appl-0:1.0.1-7.el6_2.src as a component of Red Hat Enterprise Linux Server (v. 6)
  • krb5-appl-0:1.0.1-7.el6_2.src as a component of Red Hat Enterprise Linux Workstation (v. 6)
  • krb5-appl-clients-0:1.0.1-7.el6_2.i686 as a component of Red Hat Enterprise Linux Desktop (v. 6)
  • krb5-appl-clients-0:1.0.1-7.el6_2.i686 as a component of Red Hat Enterprise Linux Server (v. 6)
  • krb5-appl-clients-0:1.0.1-7.el6_2.i686 as a component of Red Hat Enterprise Linux Workstation (v. 6)
  • krb5-appl-clients-0:1.0.1-7.el6_2.ppc64 as a component of Red Hat Enterprise Linux Server (v. 6)
  • krb5-appl-clients-0:1.0.1-7.el6_2.s390x as a component of Red Hat Enterprise Linux Server (v. 6)
  • krb5-appl-clients-0:1.0.1-7.el6_2.x86_64 as a component of Red Hat Enterprise Linux Desktop (v. 6)
  • krb5-appl-clients-0:1.0.1-7.el6_2.x86_64 as a component of Red Hat Enterprise Linux HPC Node (v. 6)
  • krb5-appl-clients-0:1.0.1-7.el6_2.x86_64 as a component of Red Hat Enterprise Linux Server (v. 6)
  • krb5-appl-clients-0:1.0.1-7.el6_2.x86_64 as a component of Red Hat Enterprise Linux Workstation (v. 6)
  • krb5-appl-debuginfo-0:1.0.1-7.el6_2.i686 as a component of Red Hat Enterprise Linux Desktop (v. 6)
  • krb5-appl-debuginfo-0:1.0.1-7.el6_2.i686 as a component of Red Hat Enterprise Linux Server (v. 6)
  • krb5-appl-debuginfo-0:1.0.1-7.el6_2.i686 as a component of Red Hat Enterprise Linux Workstation (v. 6)
  • krb5-appl-debuginfo-0:1.0.1-7.el6_2.ppc64 as a component of Red Hat Enterprise Linux Server (v. 6)
  • krb5-appl-debuginfo-0:1.0.1-7.el6_2.s390x as a component of Red Hat Enterprise Linux Server (v. 6)
  • krb5-appl-debuginfo-0:1.0.1-7.el6_2.x86_64 as a component of Red Hat Enterprise Linux Desktop (v. 6)
  • krb5-appl-debuginfo-0:1.0.1-7.el6_2.x86_64 as a component of Red Hat Enterprise Linux HPC Node (v. 6)
  • krb5-appl-debuginfo-0:1.0.1-7.el6_2.x86_64 as a component of Red Hat Enterprise Linux Server (v. 6)
  • krb5-appl-debuginfo-0:1.0.1-7.el6_2.x86_64 as a component of Red Hat Enterprise Linux Workstation (v. 6)
  • krb5-appl-servers-0:1.0.1-7.el6_2.i686 as a component of Red Hat Enterprise Linux Desktop (v. 6)
  • krb5-appl-servers-0:1.0.1-7.el6_2.i686 as a component of Red Hat Enterprise Linux Server (v. 6)
  • krb5-appl-servers-0:1.0.1-7.el6_2.i686 as a component of Red Hat Enterprise Linux Workstation (v. 6)
  • krb5-appl-servers-0:1.0.1-7.el6_2.ppc64 as a component of Red Hat Enterprise Linux Server (v. 6)
  • +5 more not shown

✅ Remediation

The krb5 telnet daemon is an xinetd service. You can determine if krb5 telnetd is enabled with the commands: /sbin/chkconfig --list krb5-telnet /sbin/chkconfig --list ekrb5-telnet The output of these commands will display "on" if krb5 telnet is enabled. krb5 telnet daemon can be immediately disabled with the commands: /sbin/chkconfig krb5-telnet off /sbin/chkconfig ekrb5-telnet off Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/kb/docs/DOC-11259

🔗 References (5)