Rapid7 Vulnerability & Exploit Database

RHSA-2011:0356: krb5 security update

Back to Search

RHSA-2011:0356: krb5 security update

Severity
8
CVSS
(AV:N/AC:H/Au:N/C:C/I:C/A:C)
Published
03/19/2011
Created
07/25/2018
Added
03/19/2011
Modified
07/04/2017

Description

Kerberos is a network authentication system which allows clients andservers to authenticate to each other using symmetric encryption and atrusted third-party, the Key Distribution Center (KDC). The Public KeyCryptography for Initial Authentication in Kerberos (PKINIT) capabilityprovides support for using public-key authentication with Kerberos.A double-free flaw was found in the way the MIT Kerberos KDC handledinitial authentication requests (AS-REQ), when the KDC was configured toprovide the PKINIT capability. A remote attacker could use this flaw tocause the KDC daemon to abort by using a specially-crafted AS-REQ request.(CVE-2011-0284)All krb5 users should upgrade to these updated packages, which containa backported patch to correct this issue. After installing the updatedpackages, the krb5kdc daemon will be restarted automatically.

Solution(s)

  • redhat-upgrade-krb5-debuginfo
  • redhat-upgrade-krb5-devel
  • redhat-upgrade-krb5-libs
  • redhat-upgrade-krb5-pkinit-openssl
  • redhat-upgrade-krb5-server
  • redhat-upgrade-krb5-server-ldap
  • redhat-upgrade-krb5-workstation

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;