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Test ID:1.3.6.1.4.1.25623.1.0.871351
Category:Red Hat Local Security Checks
Title:RedHat Update for krb5 RHSA-2015:0794-01
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 networked authentication system which allows clients and
servers to authenticate to each other with the help of a trusted third
party, the Kerberos KDC.

The following security issues are fixed with this release:

A use-after-free flaw was found in the way the MIT Kerberos libgssapi_krb5
library processed valid context deletion tokens. An attacker able to make
an application using the GSS-API library (libgssapi) could call the
gss_process_context_token() function and use this flaw to crash that
application. (CVE-2014-5352)

If kadmind were used with an LDAP back end for the KDC database, a remote,
authenticated attacker who has the permissions to set the password policy
could crash kadmind by attempting to use a named ticket policy object as a
password policy for a principal. (CVE-2014-5353)

It was found that the krb5_read_message() function of MIT Kerberos did not
correctly sanitize input, and could create invalid krb5_data objects.
A remote, unauthenticated attacker could use this flaw to crash a Kerberos
child process via a specially crafted request. (CVE-2014-5355)

A double-free flaw was found in the way MIT Kerberos handled invalid
External Data Representation (XDR) data. An authenticated user could use
this flaw to crash the MIT Kerberos administration server (kadmind), or
other applications using Kerberos libraries, via specially crafted XDR
packets. (CVE-2014-9421)

It was found that the MIT Kerberos administration server (kadmind)
incorrectly accepted certain authentication requests for two-component
server principal names. A remote attacker able to acquire a key with a
particularly named principal (such as 'kad/x') could use this flaw to
impersonate any user to kadmind, and perform administrative actions as that
user. (CVE-2014-9422)

Red Hat would like to thank the MIT Kerberos project for reporting
CVE-2014-5352, CVE-2014-9421, and CVE-2014-9422. The MIT Kerberos project
acknowledges Nico Williams for assisting with the analysis of
CVE-2014-5352.

All krb5 users are advised to upgrade to these updated packages, which
contain backported patches to correct these issues.

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:
9.0

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

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2014-5352
BugTraq ID: 72495
http://www.securityfocus.com/bid/72495
Debian Security Information: DSA-3153 (Google Search)
http://www.debian.org/security/2015/dsa-3153
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151437.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151103.html
http://www.mandriva.com/security/advisories?name=MDVSA-2015:069
RedHat Security Advisories: RHSA-2015:0439
http://rhn.redhat.com/errata/RHSA-2015-0439.html
RedHat Security Advisories: RHSA-2015:0794
http://rhn.redhat.com/errata/RHSA-2015-0794.html
SuSE Security Announcement: SUSE-SU-2015:0257 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00011.html
SuSE Security Announcement: SUSE-SU-2015:0290 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00016.html
SuSE Security Announcement: openSUSE-SU-2015:0255 (Google Search)
http://lists.opensuse.org/opensuse-updates/2015-02/msg00044.html
http://www.ubuntu.com/usn/USN-2498-1
Common Vulnerability Exposure (CVE) ID: CVE-2014-5353
BugTraq ID: 71679
http://www.securityfocus.com/bid/71679
http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155828.html
http://www.mandriva.com/security/advisories?name=MDVSA-2015:009
https://lists.debian.org/debian-lts-announce/2018/01/msg00040.html
http://www.securitytracker.com/id/1031376
SuSE Security Announcement: openSUSE-SU-2015:0542 (Google Search)
http://lists.opensuse.org/opensuse-updates/2015-03/msg00061.html
Common Vulnerability Exposure (CVE) ID: CVE-2014-5355
BugTraq ID: 74042
http://www.securityfocus.com/bid/74042
http://www.ubuntu.com/usn/USN-2810-1
Common Vulnerability Exposure (CVE) ID: CVE-2014-9421
BugTraq ID: 72496
http://www.securityfocus.com/bid/72496
Common Vulnerability Exposure (CVE) ID: CVE-2014-9422
BugTraq ID: 72494
http://www.securityfocus.com/bid/72494
CopyrightCopyright (C) 2015 Greenbone Networks GmbH

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