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RHSA-2011:1851: krb5 security update

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RHSA-2011:1851: krb5 security update

Severity
10
CVSS
(AV:N/AC:L/Au:N/C:C/I:C/A:C)
Published
12/24/2011
Created
07/25/2018
Added
01/03/2012
Modified
07/04/2017

Description

Kerberos is a network authentication system which allows clients and serversto authenticate to each other using symmetric encryption and a trusted third-party, the Key Distribution Center (KDC).A buffer overflow flaw was found in the MIT krb5 telnet daemon (telnetd). Aremote attacker who can access the telnet port of a target machine could usethis flaw to execute arbitrary code as root. (CVE-2011-4862)Note that the krb5 telnet daemon is not enabled by default in any version of Red Hat Enterprise Linux. In addition, the default firewall rules blockremote access to the telnet port. This flaw does not affect the telnetdaemon distributed in the telnet-server package.For users who have installed the krb5-workstation package, have enabled thetelnet daemon, and have it accessible remotely, this update should beapplied immediately. All krb5-workstation users should upgrade to these updated packages, whichcontain a backported patch to correct this issue.

Solution(s)

  • redhat-upgrade-krb5-devel
  • redhat-upgrade-krb5-libs
  • redhat-upgrade-krb5-server
  • redhat-upgrade-krb5-server-ldap
  • redhat-upgrade-krb5-workstation

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