RHEL 4 : krb5 (RHSA-2008:0180)

high Nessus Plugin ID 31617

Synopsis

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

Description

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

This update has been rated as having critical 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 through use of symmetric encryption and a trusted third party, the KDC.

A flaw was found in the way the MIT Kerberos Authentication Service and Key Distribution Center server (krb5kdc) handled Kerberos v4 protocol packets. An unauthenticated remote attacker could use this flaw to crash the krb5kdc daemon, disclose portions of its memory, or possibly execute arbitrary code using malformed or truncated Kerberos v4 protocol requests. (CVE-2008-0062, CVE-2008-0063)

This issue only affected krb5kdc with Kerberos v4 protocol compatibility enabled, which is the default setting on Red Hat Enterprise Linux 4. Kerberos v4 protocol support can be disabled by adding 'v4_mode=none' (without the quotes) to the '[kdcdefaults]' section of /var/kerberos/krb5kdc/kdc.conf.

Red Hat would like to thank MIT for reporting these issues.

A double-free flaw was discovered in the GSSAPI library used by MIT Kerberos. This flaw could possibly cause a crash of the application using the GSSAPI library. (CVE-2007-5971)

All krb5 users are advised to update to these erratum packages which contain backported fixes to correct these issues.

Solution

Update the affected packages.

See Also

https://access.redhat.com/security/cve/cve-2007-5971

https://access.redhat.com/security/cve/cve-2008-0062

https://access.redhat.com/security/cve/cve-2008-0063

https://access.redhat.com/errata/RHSA-2008:0180

Plugin Details

Severity: High

ID: 31617

File Name: redhat-RHSA-2008-0180.nasl

Version: 1.32

Type: local

Agent: unix

Published: 3/19/2008

Updated: 1/14/2021

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 9.3

Temporal Score: 6.9

Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C

Temporal Vector: E:U/RL:OF/RC: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:4.6

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

Exploit Ease: No known exploits are available

Patch Publication Date: 3/18/2008

Vulnerability Publication Date: 12/5/2007

Reference Information

CVE: CVE-2007-5971, CVE-2008-0062, CVE-2008-0063

BID: 26750, 28303

RHSA: 2008:0180

CWE: 119, 189, 399