Slackware Security Advisories
Slackware Logo


Security Advisories



General Info

Get Slack

Install Help






Other Sites



Mailing Lists


From: Slackware Security Team <>
Subject: [slackware-security] ntp (SSA:2018-229-01)
Date: Fri, 17 Aug 2018 10:43:28 -0700 (PDT)
Hash: SHA1

[slackware-security]  ntp (SSA:2018-229-01)

New ntp packages are available for Slackware 14.0, 14.1, 14.2, and -current to
fix security issues.

Here are the details from the Slackware 14.2 ChangeLog:
patches/packages/ntp-4.2.8p12-i586-1_slack14.2.txz:  Upgraded.
  This release improves on one security fix in ntpd:
    LOW/MEDIUM: Sec 3012: Sybil vulnerability: ephemeral association attack
    While fixed in ntp-4.2.8p7 and with significant additional protections for
    this issue in 4.2.8p11, ntp-4.2.8p12 includes a fix for an edge case in
    the new noepeer support. Originally reported by Matt Van Gundy of Cisco.
    Edge-case hole reported by Martin Burnicki of Meinberg.
  And fixes another security issue in ntpq and ntpdc:
    LOW: Sec 3505: The openhost() function used during command-line hostname
    processing by ntpq and ntpdc can write beyond its buffer limit, which
    could allow  an attacker to achieve code execution or escalate to higher
    privileges via a long string as the argument for an IPv4 or IPv6
    command-line parameter. NOTE: It is unclear whether there are any common
    situations in which ntpq or ntpdc is used with a command line from an
    untrusted source. Reported by Fakhri Zulkifli.
  For more information, see:
  (* Security fix *)

Where to find the new packages:

Thanks to the friendly folks at the OSU Open Source Lab
( for donating FTP and rsync hosting
to the Slackware project!  :-)

Also see the "Get Slack" section on for
additional mirror sites near you.

Updated package for Slackware 14.0:

Updated package for Slackware x86_64 14.0:

Updated package for Slackware 14.1:

Updated package for Slackware x86_64 14.1:

Updated package for Slackware 14.2:

Updated package for Slackware x86_64 14.2:

Updated package for Slackware -current:

Updated package for Slackware x86_64 -current:

MD5 signatures:

Slackware 14.0 package:
4a4cc8e4dc6964dc4521058ce776ce4e  ntp-4.2.8p12-i486-1_slack14.0.txz

Slackware x86_64 14.0 package:
d3a0c36c39e1c0cf5e3b8707f948a180  ntp-4.2.8p12-x86_64-1_slack14.0.txz

Slackware 14.1 package:
7c42e1d9fa476c162be9375a7b662654  ntp-4.2.8p12-i486-1_slack14.1.txz

Slackware x86_64 14.1 package:
75472911bb9a76a949c94aa21471f6f0  ntp-4.2.8p12-x86_64-1_slack14.1.txz

Slackware 14.2 package:
2ecd58c0cb1f6d035b36de9098e0d075  ntp-4.2.8p12-i586-1_slack14.2.txz

Slackware x86_64 14.2 package:
96844a4152a8dba26ed73d91662122ce  ntp-4.2.8p12-x86_64-1_slack14.2.txz

Slackware -current package:
dc3f52b871f3edc1a64e2d9ef1649591  n/ntp-4.2.8p12-i586-1.txz

Slackware x86_64 -current package:
ecd43289b917c81e682b9b00077c1409  n/ntp-4.2.8p12-x86_64-1.txz

Installation instructions:

Upgrade the package as root:
# upgradepkg ntp-4.2.8p12-i586-1_slack14.2.txz

Then, restart the NTP daemon:

# sh /etc/rc.d/rc.ntpd restart


Slackware Linux Security Team

| To leave the slackware-security mailing list:                          |
| Send an email to with this text in the body of |
| the email message:                                                     |
|                                                                        |
|   unsubscribe slackware-security                                       |
|                                                                        |
| You will get a confirmation message back containing instructions to    |
| complete the process.  Please do not reply to this email address.      |


Slackware® is a registered trademark of Slackware Linux, Inc. All logos and graphics are copyrighted.