RHSA-2011:1854Critical

Red Hat Security Advisory: krb5-appl security update

Published
December 28, 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 products28

  • Red Hat Enterprise Linux Server EUS (v. 6.0)
  • Red Hat Enterprise Linux Server EUS (v. 6.1)
  • krb5-appl-0:1.0.1-1.el6_0.1.src as a component of Red Hat Enterprise Linux Server EUS (v. 6.0)
  • krb5-appl-0:1.0.1-2.el6_1.3.src as a component of Red Hat Enterprise Linux Server EUS (v. 6.1)
  • krb5-appl-clients-0:1.0.1-1.el6_0.1.i686 as a component of Red Hat Enterprise Linux Server EUS (v. 6.0)
  • krb5-appl-clients-0:1.0.1-1.el6_0.1.ppc64 as a component of Red Hat Enterprise Linux Server EUS (v. 6.0)
  • krb5-appl-clients-0:1.0.1-1.el6_0.1.s390x as a component of Red Hat Enterprise Linux Server EUS (v. 6.0)
  • krb5-appl-clients-0:1.0.1-1.el6_0.1.x86_64 as a component of Red Hat Enterprise Linux Server EUS (v. 6.0)
  • krb5-appl-clients-0:1.0.1-2.el6_1.3.i686 as a component of Red Hat Enterprise Linux Server EUS (v. 6.1)
  • krb5-appl-clients-0:1.0.1-2.el6_1.3.ppc64 as a component of Red Hat Enterprise Linux Server EUS (v. 6.1)
  • krb5-appl-clients-0:1.0.1-2.el6_1.3.s390x as a component of Red Hat Enterprise Linux Server EUS (v. 6.1)
  • krb5-appl-clients-0:1.0.1-2.el6_1.3.x86_64 as a component of Red Hat Enterprise Linux Server EUS (v. 6.1)
  • krb5-appl-debuginfo-0:1.0.1-1.el6_0.1.i686 as a component of Red Hat Enterprise Linux Server EUS (v. 6.0)
  • krb5-appl-debuginfo-0:1.0.1-1.el6_0.1.ppc64 as a component of Red Hat Enterprise Linux Server EUS (v. 6.0)
  • krb5-appl-debuginfo-0:1.0.1-1.el6_0.1.s390x as a component of Red Hat Enterprise Linux Server EUS (v. 6.0)
  • krb5-appl-debuginfo-0:1.0.1-1.el6_0.1.x86_64 as a component of Red Hat Enterprise Linux Server EUS (v. 6.0)
  • krb5-appl-debuginfo-0:1.0.1-2.el6_1.3.i686 as a component of Red Hat Enterprise Linux Server EUS (v. 6.1)
  • krb5-appl-debuginfo-0:1.0.1-2.el6_1.3.ppc64 as a component of Red Hat Enterprise Linux Server EUS (v. 6.1)
  • krb5-appl-debuginfo-0:1.0.1-2.el6_1.3.s390x as a component of Red Hat Enterprise Linux Server EUS (v. 6.1)
  • krb5-appl-debuginfo-0:1.0.1-2.el6_1.3.x86_64 as a component of Red Hat Enterprise Linux Server EUS (v. 6.1)
  • krb5-appl-servers-0:1.0.1-1.el6_0.1.i686 as a component of Red Hat Enterprise Linux Server EUS (v. 6.0)
  • krb5-appl-servers-0:1.0.1-1.el6_0.1.ppc64 as a component of Red Hat Enterprise Linux Server EUS (v. 6.0)
  • krb5-appl-servers-0:1.0.1-1.el6_0.1.s390x as a component of Red Hat Enterprise Linux Server EUS (v. 6.0)
  • krb5-appl-servers-0:1.0.1-1.el6_0.1.x86_64 as a component of Red Hat Enterprise Linux Server EUS (v. 6.0)
  • krb5-appl-servers-0:1.0.1-2.el6_1.3.i686 as a component of Red Hat Enterprise Linux Server EUS (v. 6.1)
  • krb5-appl-servers-0:1.0.1-2.el6_1.3.ppc64 as a component of Red Hat Enterprise Linux Server EUS (v. 6.1)
  • krb5-appl-servers-0:1.0.1-2.el6_1.3.s390x as a component of Red Hat Enterprise Linux Server EUS (v. 6.1)
  • krb5-appl-servers-0:1.0.1-2.el6_1.3.x86_64 as a component of Red Hat Enterprise Linux Server EUS (v. 6.1)

✅ 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 command 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)