Vulnerability of NTP.org: NULL pointer dereference via Authenticated Mode 6

Synthesis of the vulnerability

An attacker can force a NULL pointer to be dereferenced via Authenticated Mode 6 of NTP.org, in order to trigger a denial of service.

Impacted products: Fedora, FreeBSD, AIX, Meinberg NTP Server, Data ONTAP 7-Mode, NTP.org, openSUSE Leap, Solaris, pfSense, RSA Authentication Manager, Slackware, SUSE Linux Enterprise Desktop, SLES.

Severity of this bulletin: 2/4.

Creation date: 08/03/2019.

Références of this threat: 3565, bulletinapr2019, CVE-2019-8936, DSA-2019-093, FEDORA-2019-694e3aa4e8, FEDORA-2019-f781d5c4c6, FreeBSD-SA-19:04.ntp, NTAP-20190503-0001, openSUSE-SU-2019:1143-1, openSUSE-SU-2019:1158-1, SSA:2019-067-01, SUSE-SU-2019:0775-1, SUSE-SU-2019:0777-1, SUSE-SU-2019:0789-1, SUSE-SU-2019:13991-1, SUSE-SU-2019:14004-1, VIGILANCE-VUL-28701.

Description of the vulnerability

An attacker can force a NULL pointer to be dereferenced via Authenticated Mode 6 of NTP.org, in order to trigger a denial of service.
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This cybersecurity alert impacts software or systems such as Fedora, FreeBSD, AIX, Meinberg NTP Server, Data ONTAP 7-Mode, NTP.org, openSUSE Leap, Solaris, pfSense, RSA Authentication Manager, Slackware, SUSE Linux Enterprise Desktop, SLES.

Our Vigil@nce team determined that the severity of this weakness is medium.

The trust level is of type confirmed by the editor, with an origin of user account.

An attacker with a expert ability can exploit this security weakness.

Solutions for this threat

NTP.org: version 4.2.8p13.
The version 4.2.8p13 is fixed:
https://www.ntp.org/

AIX: patch for NTP.
A patch is available:
https://aix.software.ibm.com/aix/efixes/security/ntp_fix12.tar

Fedora: new ntp packages.
New packages are available:
Fedora 28: ntp 4.2.8p13-1.fc28
Fedora 29: ntp 4.2.8p13-1.fc29

FreeBSD: patch for ntpd.
A patch is available:
FreeBSD 12.0: https://security.freebsd.org/patches/SA-19:04/ntp.patch
FreeBSD 11.2: https://security.freebsd.org/patches/SA-19:04/ntp-11.2.patch

Meinberg NTP Server: version 4.2.8p13.
The version 4.2.8p13 is fixed:
https://www.meinbergglobal.com/english/sw/ntp.htm

NetApp Data ONTAP: patch for ntpd.
A patch is available:
https://mysupport.netapp.com/NOW/download/software/ontap/8.2.5P2/

openSUSE Leap 15.0: new ntp packages.
New packages are available:
openSUSE Leap 15.0: ntp 4.2.8p13-lp150.8.1

openSUSE Leap 42.3: new ntp packages.
New packages are available:
openSUSE Leap 42.3: ntp 4.2.8p13-31.9.1

Oracle Solaris: patch for third party software of April 2019 v3.
A patch is available:
https://support.oracle.com/rs?type=doc&id=1448883.1

pfSense: version 2.4.4-p3.
The version 2.4.4-p3 is fixed.

RSA Authentication Manager: solution for Embedded Components.
The solution is indicated in information sources.

Slackware: new ntp packages.
New packages are available:
  Slackware 14.0: ntp 4.2.8p13-*-1_slack14.0
  Slackware 14.1: ntp 4.2.8p13-*-1_slack14.1
  Slackware 14.2: ntp 4.2.8p13-*-1_slack14.2

SUSE LE 11 SP3: new ntp packages.
New packages are available:
SUSE LE 11 SP3: ntp 4.2.8p13-48.27.1

SUSE LE 11 SP4: new ntp packages.
New packages are available:
SUSE LE 11 SP4: ntp 4.2.8p13-64.13.1

SUSE LE 12: new ntp packages.
New packages are available:
  SUSE LE 12 SP1: ntp 4.2.8p13-85.1
  SUSE LE 12 SP2: ntp 4.2.8p13-85.1
  SUSE LE 12 SP3: ntp 4.2.8p13-85.1
  SUSE LE 12 SP4: ntp 4.2.8p13-85.1

SUSE LE 12 RTM: new ntp packages.
New packages are available:
SUSE LE 12 RTM: ntp 4.2.8p13-46.32.1

SUSE LE 15: new ntp packages.
New packages are available:
SUSE LE 15 RTM: ntp 4.2.8p13-4.6.1

Wind River Linux: version 10.18.44.9.
The version 10.18.44.9 is fixed:
https://support2.windriver.com/
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