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Test ID:1.3.6.1.4.1.25623.1.0.870596
Category:Red Hat Local Security Checks
Title:RedHat Update for krb5 RHSA-2011:0356-01
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). The Public Key
Cryptography for Initial Authentication in Kerberos (PKINIT) capability
provides support for using public-key authentication with Kerberos.

A double-free flaw was found in the way the MIT Kerberos KDC handled
initial authentication requests (AS-REQ), when the KDC was configured to
provide the PKINIT capability. A remote attacker could use this flaw to
cause 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 contain
a backported patch to correct this issue. 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:
7.6

CVSS Vector:
AV:N/AC:H/Au:N/C:C/I:C/A:C

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2011-0284
BugTraq ID: 46881
http://www.securityfocus.com/bid/46881
Bugtraq: 20110315 MITKRB5-SA-2011-003 [CVE-2011-0284] KDC double-free when PKINIT enabled (Google Search)
http://www.securityfocus.com/archive/1/517029/100/0/threaded
CERT/CC vulnerability note: VU#943220
http://www.kb.cert.org/vuls/id/943220
http://lists.fedoraproject.org/pipermail/package-announce/2011-March/056579.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-March/056573.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-March/056413.html
http://www.mandriva.com/security/advisories?name=MDVSA-2011:048
http://osvdb.org/71183
http://www.redhat.com/support/errata/RHSA-2011-0356.html
http://securitytracker.com/id?1025216
http://secunia.com/advisories/43700
http://secunia.com/advisories/43760
http://secunia.com/advisories/43783
http://secunia.com/advisories/43881
SuSE Security Announcement: SUSE-SR:2011:005 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2011-04/msg00000.html
http://www.ubuntu.com/usn/USN-1088-1
http://www.vupen.com/english/advisories/2011/0672
http://www.vupen.com/english/advisories/2011/0673
http://www.vupen.com/english/advisories/2011/0680
http://www.vupen.com/english/advisories/2011/0722
http://www.vupen.com/english/advisories/2011/0763
XForce ISS Database: kerberos-perpareerroras-code-execution(66101)
https://exchange.xforce.ibmcloud.com/vulnerabilities/66101
CopyrightCopyright (c) 2012 Greenbone Networks GmbH

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