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Category:   Application (Generic)  >   ntp Vendors:   ntp.org
(Oracle Issues Fix for Oracle Linux) ntp Multiple Bugs Let Remote or Local Users Cause the Target Service to Crash
SecurityTracker Alert ID:  1039667
SecurityTracker URL:  http://securitytracker.com/id/1039667
CVE Reference:   CVE-2017-6462, CVE-2017-6463, CVE-2017-6464   (Links to External Site)
Date:  Oct 26 2017
Impact:   Denial of service via local system, Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 4.2.8p9 and prior
Description:   Multiple vulnerabilities were reported in ntp. A remote or local user can cause the target service to crash.

A remote authenticated user can set a specially crafted configuration directive to cause the target ntpd service to crash [CVE-2017-6464].

A local user that can load a specially crafted '/dev/datum/' device can trigger a buffer overflow in datum_pts_receive() in the legacy Datum Programmable Time Server refclock driver and cause denial of service conditions [CVE-2017-6462].

A remote authenticated user can send a specially crafted ':config' directive to trigger a segmentation fault on the target NTP server [CVE-2017-6463].

A local user can cause DLLs to be executed with elevated privileges and cause denial of service conditions on Windows-based systems [CVE-2017-6455].

A local user can supply specially crafted command line parameters to trigger a stack overflow in addSourceToRegistry() on Windows-based systems [CVE-2017-6452].

A remote user can cause a data structure to be terminated incorrectly on Windows-based systems [CVE-2017-6459].

A remote user can send specially crafted data to trigger an overflow in the ctl_put() function and cause the target service to crash [CVE-2017-6458].

A remote user may be able to trigger an out-of-bounds memory write error in mx4200_send() on systems with the legacy MX4200 refclock enabled and cause the target service to crash [CVE-2017-6451].

A remote ntpd server can trigger a stack buffer overflow in ntpq when return a restriction list to cause the target ntpq service to crash [CVE-2017-6460].

A remote user that can spoof servers can exploit a timestamp origin check flaw and cause timestamp reset replies to be dropped [CVE-2016-9042].

Cure53 and Matthew Van Gundy of Cisco ASIG reported these vulnerabilities.

Impact:   A remote or local user can cause the target service to crash.
Solution:   Oracle has issued a fix for CVE-2017-6462, CVE-2017-6463, and CVE-2017-6464.

The Oracle Linux advisory is available at:

http://linux.oracle.com/errata/ELSA-2017-3071.html

Vendor URL:  linux.oracle.com/errata/ELSA-2017-3071.html (Links to External Site)
Cause:   Access control error, Boundary error, Input validation error, State error
Underlying OS:  Linux (Oracle)
Underlying OS Comments:  6

Message History:   This archive entry is a follow-up to the message listed below.
Mar 24 2017 ntp Multiple Bugs Let Remote or Local Users Cause the Target Service to Crash



 Source Message Contents

Subject:  [El-errata] ELSA-2017-3071 Moderate: Oracle Linux 6 ntp security update

Oracle Linux Security Advisory ELSA-2017-3071

http://linux.oracle.com/errata/ELSA-2017-3071.html

The following updated rpms for Oracle Linux 6 have been uploaded to the 
Unbreakable Linux Network:

i386:
ntp-4.2.6p5-12.0.1.el6_9.1.i686.rpm
ntp-doc-4.2.6p5-12.0.1.el6_9.1.noarch.rpm
ntp-perl-4.2.6p5-12.0.1.el6_9.1.i686.rpm
ntpdate-4.2.6p5-12.0.1.el6_9.1.i686.rpm

x86_64:
ntp-4.2.6p5-12.0.1.el6_9.1.x86_64.rpm
ntp-doc-4.2.6p5-12.0.1.el6_9.1.noarch.rpm
ntp-perl-4.2.6p5-12.0.1.el6_9.1.x86_64.rpm
ntpdate-4.2.6p5-12.0.1.el6_9.1.x86_64.rpm


SRPMS:
http://oss.oracle.com/ol6/SRPMS-updates/ntp-4.2.6p5-12.0.1.el6_9.1.src.rpm



Description of changes:

[4.2.6p5-12.0.1.el6_9.1]
- add disable monitor to default ntp.conf [CVE-2013-5211]

[4.2.6p5-12.el6_9.1]
- fix buffer overflow in datum refclock driver (CVE-2017-6462)
- fix crash with invalid unpeer command (CVE-2017-6463)
- fix potential crash with invalid server command (CVE-2017-6464)

[4.2.6p5-12]
- don't limit rate of packets from sources (CVE-2016-7426)
- don't change interface from received packets (CVE-2016-7429)
- fix calculation of root distance again (CVE-2016-7433)
- require authentication for trap commands (CVE-2016-9310)
- fix crash when reporting peer event to trappers (CVE-2016-9311)

[4.2.6p5-11]
- don't allow spoofed packets to demobilize associations (CVE-2015-7979,
   CVE-2016-1547)
- don't allow spoofed packet to enable symmetric interleaved mode
   (CVE-2016-1548)
- check mode of new source in config command (CVE-2016-2518)
- make MAC check resilient against timing attack (CVE-2016-1550)


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