RHEL 4 : krb5 (RHSA-2009:0409)

Critical Nessus Plugin ID 36113


The remote Red Hat host is missing one or more security updates.


Updated krb5 packages that fix a security issue are now available for Red Hat Enterprise Linux 4.

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

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. (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.


Update the affected packages.

See Also




Plugin Details

Severity: Critical

ID: 36113

File Name: redhat-RHSA-2009-0409.nasl

Version: $Revision: 1.18 $

Type: local

Agent: unix

Published: 2009/04/08

Modified: 2017/01/03

Dependencies: 12634

Risk Information

Risk Factor: Critical


Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:krb5-devel, p-cpe:/a:redhat:enterprise_linux:krb5-libs, p-cpe:/a:redhat:enterprise_linux:krb5-server, p-cpe:/a:redhat:enterprise_linux:krb5-workstation, cpe:/o:redhat:enterprise_linux:4, cpe:/o:redhat:enterprise_linux:4.7

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Patch Publication Date: 2009/04/07

Reference Information

CVE: CVE-2009-0844, CVE-2009-0845, CVE-2009-0846, CVE-2009-0847

RHSA: 2009:0409

CWE: 20, 119, 189