ESB-2017.2708 - [RedHat] ntp: Denial of service - Existing account 2017-10-27

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.2708
                       Moderate: ntp security update
                              27 October 2017

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           ntp
Publisher:         Red Hat
Operating System:  Red Hat Enterprise Linux Server 6
                   Red Hat Enterprise Linux WS/Desktop 6
Impact/Access:     Denial of Service -- Existing Account
Resolution:        Mitigation
CVE Names:         CVE-2017-6464 CVE-2017-6463 CVE-2017-6462

Reference:         ESB-2017.2425
                   ESB-2017.2125
                   ESB-2017.1681
                   ESB-2017.1355
                   ESB-2017.0973
                   ESB-2017.0947

Original Bulletin: 
   https://access.redhat.com/errata/RHSA-2017:3071

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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: ntp security update
Advisory ID:       RHSA-2017:3071-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2017:3071
Issue date:        2017-10-26
CVE Names:         CVE-2017-6462 CVE-2017-6463 CVE-2017-6464 
=====================================================================

1. Summary:

An update for ntp is now available for Red Hat Enterprise Linux 6.

Red Hat Product Security has rated this update as having a security impact
of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available for each vulnerability from
the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64
Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, noarch, x86_64
Red Hat Enterprise Linux HPC Node (v. 6) - x86_64
Red Hat Enterprise Linux HPC Node Optional (v. 6) - noarch, x86_64
Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 6) - i386, noarch, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, noarch, x86_64

3. Description:

The Network Time Protocol (NTP) is used to synchronize a computer's time
with another referenced time source. These packages include the ntpd
service which continuously adjusts system time and utilities used to query
and configure the ntpd service.

Security Fix(es):

* Two vulnerabilities were discovered in the NTP server's parsing of
configuration directives. A remote, authenticated attacker could cause ntpd
to crash by sending a crafted message. (CVE-2017-6463, CVE-2017-6464)

* A vulnerability was found in NTP, in the parsing of packets from the
/dev/datum device. A malicious device could send crafted messages, causing
ntpd to crash. (CVE-2017-6462)

Red Hat would like to thank the NTP project for reporting these issues.
Upstream acknowledges Cure53 as the original reporter of these issues.

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

After installing this update, the ntpd daemon will restart automatically.

5. Bugs fixed (https://bugzilla.redhat.com/):

1433987 - CVE-2017-6464 ntp: Denial of Service via Malformed Config
1433995 - CVE-2017-6462 ntp: Buffer Overflow in DPTS Clock
1434002 - CVE-2017-6463 ntp: Authenticated DoS via Malicious Config Option

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:
ntp-4.2.6p5-12.el6_9.1.src.rpm

i386:
ntp-4.2.6p5-12.el6_9.1.i686.rpm
ntp-debuginfo-4.2.6p5-12.el6_9.1.i686.rpm
ntpdate-4.2.6p5-12.el6_9.1.i686.rpm

x86_64:
ntp-4.2.6p5-12.el6_9.1.x86_64.rpm
ntp-debuginfo-4.2.6p5-12.el6_9.1.x86_64.rpm
ntpdate-4.2.6p5-12.el6_9.1.x86_64.rpm

Red Hat Enterprise Linux Desktop Optional (v. 6):

i386:
ntp-debuginfo-4.2.6p5-12.el6_9.1.i686.rpm
ntp-perl-4.2.6p5-12.el6_9.1.i686.rpm

noarch:
ntp-doc-4.2.6p5-12.el6_9.1.noarch.rpm

x86_64:
ntp-debuginfo-4.2.6p5-12.el6_9.1.x86_64.rpm
ntp-perl-4.2.6p5-12.el6_9.1.x86_64.rpm

Red Hat Enterprise Linux HPC Node (v. 6):

Source:
ntp-4.2.6p5-12.el6_9.1.src.rpm

x86_64:
ntp-4.2.6p5-12.el6_9.1.x86_64.rpm
ntp-debuginfo-4.2.6p5-12.el6_9.1.x86_64.rpm
ntpdate-4.2.6p5-12.el6_9.1.x86_64.rpm

Red Hat Enterprise Linux HPC Node Optional (v. 6):

noarch:
ntp-doc-4.2.6p5-12.el6_9.1.noarch.rpm

x86_64:
ntp-debuginfo-4.2.6p5-12.el6_9.1.x86_64.rpm
ntp-perl-4.2.6p5-12.el6_9.1.x86_64.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:
ntp-4.2.6p5-12.el6_9.1.src.rpm

i386:
ntp-4.2.6p5-12.el6_9.1.i686.rpm
ntp-debuginfo-4.2.6p5-12.el6_9.1.i686.rpm
ntpdate-4.2.6p5-12.el6_9.1.i686.rpm

ppc64:
ntp-4.2.6p5-12.el6_9.1.ppc64.rpm
ntp-debuginfo-4.2.6p5-12.el6_9.1.ppc64.rpm
ntpdate-4.2.6p5-12.el6_9.1.ppc64.rpm

s390x:
ntp-4.2.6p5-12.el6_9.1.s390x.rpm
ntp-debuginfo-4.2.6p5-12.el6_9.1.s390x.rpm
ntpdate-4.2.6p5-12.el6_9.1.s390x.rpm

x86_64:
ntp-4.2.6p5-12.el6_9.1.x86_64.rpm
ntp-debuginfo-4.2.6p5-12.el6_9.1.x86_64.rpm
ntpdate-4.2.6p5-12.el6_9.1.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 6):

i386:
ntp-debuginfo-4.2.6p5-12.el6_9.1.i686.rpm
ntp-perl-4.2.6p5-12.el6_9.1.i686.rpm

noarch:
ntp-doc-4.2.6p5-12.el6_9.1.noarch.rpm

ppc64:
ntp-debuginfo-4.2.6p5-12.el6_9.1.ppc64.rpm
ntp-perl-4.2.6p5-12.el6_9.1.ppc64.rpm

s390x:
ntp-debuginfo-4.2.6p5-12.el6_9.1.s390x.rpm
ntp-perl-4.2.6p5-12.el6_9.1.s390x.rpm

x86_64:
ntp-debuginfo-4.2.6p5-12.el6_9.1.x86_64.rpm
ntp-perl-4.2.6p5-12.el6_9.1.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
ntp-4.2.6p5-12.el6_9.1.src.rpm

i386:
ntp-4.2.6p5-12.el6_9.1.i686.rpm
ntp-debuginfo-4.2.6p5-12.el6_9.1.i686.rpm
ntpdate-4.2.6p5-12.el6_9.1.i686.rpm

x86_64:
ntp-4.2.6p5-12.el6_9.1.x86_64.rpm
ntp-debuginfo-4.2.6p5-12.el6_9.1.x86_64.rpm
ntpdate-4.2.6p5-12.el6_9.1.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 6):

i386:
ntp-debuginfo-4.2.6p5-12.el6_9.1.i686.rpm
ntp-perl-4.2.6p5-12.el6_9.1.i686.rpm

noarch:
ntp-doc-4.2.6p5-12.el6_9.1.noarch.rpm

x86_64:
ntp-debuginfo-4.2.6p5-12.el6_9.1.x86_64.rpm
ntp-perl-4.2.6p5-12.el6_9.1.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2017-6462
https://access.redhat.com/security/cve/CVE-2017-6463
https://access.redhat.com/security/cve/CVE-2017-6464
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2017 Red Hat, Inc.
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