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Test ID:1.3.6.1.4.1.25623.1.0.870723
Category:Red Hat Local Security Checks
Title:RedHat Update for krb5 RHSA-2011:0200-01
Summary:The remote host is missing an update for the 'krb5'; package(s) announced via the referenced advisory.
Description:Summary:
The remote host is missing an update for the 'krb5'
package(s) announced via the referenced advisory.

Vulnerability Insight:
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).

A NULL pointer dereference flaw was found in the way the MIT Kerberos KDC
processed principal names that were not null terminated, when the KDC was
configured to use an LDAP back end. A remote attacker could use this flaw
to crash the KDC via a specially-crafted request. (CVE-2011-0282)

A denial of service flaw was found in the way the MIT Kerberos KDC
processed certain principal names when the KDC was configured to use an
LDAP back end. A remote attacker could use this flaw to cause the KDC to
hang via a specially-crafted request. (CVE-2011-0281)

A denial of service flaw was found in the way the MIT Kerberos V5 slave KDC
update server (kpropd) processed certain update requests for KDC database
propagation. A remote attacker could use this flaw to terminate the kpropd
daemon via a specially-crafted update request. (CVE-2010-4022)

Red Hat would like to thank the MIT Kerberos Team for reporting the
CVE-2011-0282 and CVE-2011-0281 issues. Upstream acknowledges Kevin
Longfellow of Oracle Corporation as the original reporter of the
CVE-2011-0281 issue.

All krb5 users should upgrade to these updated packages, which contain
backported patches to correct these issues. After installing the updated
packages, the krb5kdc daemon will be restarted automatically.

Affected Software/OS:
krb5 on Red Hat Enterprise Linux Desktop (v. 6),
Red Hat Enterprise Linux Server (v. 6),
Red Hat Enterprise Linux Workstation (v. 6)

Solution:
Please Install the Updated Packages.

CVSS Score:
5.0

CVSS Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:P

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2010-4022
BugTraq ID: 46269
http://www.securityfocus.com/bid/46269
Bugtraq: 20110208 MITKRB5-SA-2011-001 kpropd denial of service [CVE-2010-4022] (Google Search)
http://www.securityfocus.com/archive/1/516286/100/0/threaded
http://www.mandriva.com/security/advisories?name=MDVSA-2011:025
http://www.redhat.com/support/errata/RHSA-2011-0200.html
http://www.securitytracker.com/id?1025035
http://secunia.com/advisories/43260
http://secunia.com/advisories/43275
http://securityreason.com/securityalert/8070
SuSE Security Announcement: SUSE-SR:2011:004 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00004.html
http://www.vupen.com/english/advisories/2011/0329
http://www.vupen.com/english/advisories/2011/0333
http://www.vupen.com/english/advisories/2011/0347
http://www.vupen.com/english/advisories/2011/0464
Common Vulnerability Exposure (CVE) ID: CVE-2011-0281
BugTraq ID: 46265
http://www.securityfocus.com/bid/46265
Bugtraq: 20110208 MITKRB5-SA-2011-002 KDC denial of service attacks [CVE-2011-0281 CVE-2011-0282 CVE-2011-0283] (Google Search)
http://www.securityfocus.com/archive/1/516299/100/0/threaded
Bugtraq: 20111013 VMSA-2011-0012 VMware ESXi and ESX updates to third party libraries and ESX Service Console (Google Search)
http://www.securityfocus.com/archive/1/520102/100/0/threaded
http://www.mandriva.com/security/advisories?name=MDVSA-2011:024
http://mailman.mit.edu/pipermail/kerberos/2010-December/016800.html
http://www.redhat.com/support/errata/RHSA-2011-0199.html
http://www.securitytracker.com/id?1025037
http://secunia.com/advisories/43273
http://secunia.com/advisories/46397
http://securityreason.com/securityalert/8073
http://www.vupen.com/english/advisories/2011/0330
XForce ISS Database: kerberos-ldap-descriptor-dos(65324)
https://exchange.xforce.ibmcloud.com/vulnerabilities/65324
Common Vulnerability Exposure (CVE) ID: CVE-2011-0282
BugTraq ID: 46271
http://www.securityfocus.com/bid/46271
XForce ISS Database: kerberos-ldap-dos(65323)
https://exchange.xforce.ibmcloud.com/vulnerabilities/65323
CopyrightCopyright (c) 2012 Greenbone Networks GmbH

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