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Test ID:1.3.6.1.4.1.25623.1.0.150700
Category:Denial of Service
Title:NTP < 4.2.8p13 NULL Pointer Dereference Vulnerability
Summary:A crafted malicious authenticated mode 6 (ntpq) packet from a; permitted network address can trigger a NULL pointer dereference, crashing ntpd. Note that for; this attack to work, the sending system must be on an address that the target's ntpd accepts mode; 6 packets from, and must use a private key that is specifically listed as being used for mode 6; authorization.
Description:Summary:
A crafted malicious authenticated mode 6 (ntpq) packet from a
permitted network address can trigger a NULL pointer dereference, crashing ntpd. Note that for
this attack to work, the sending system must be on an address that the target's ntpd accepts mode
6 packets from, and must use a private key that is specifically listed as being used for mode 6
authorization.

Vulnerability Insight:
Please see the references for more information on the vulnerabilities.

Affected Software/OS:
NTPd version prior to 4.2.8p13, 4.3.0 through 4.3.94.

Solution:
Update to version 4.2.8p13, 4.3.94 or later.

CVSS Score:
5.0

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

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2019-8936
Bugtraq: 20190515 FreeBSD Security Advisory FreeBSD-SA-19:04.ntp (Google Search)
https://seclists.org/bugtraq/2019/May/39
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JBGXY7OKWOLT6X6JAPVZRFEP4FLCGGST/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KQDNHNYOJK2SRSGO23GQ2RXTOUY2HLNN/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2NVS2CSG2TQ663CXOZZUJN4STQPMENNP/
FreeBSD Security Advisory: FreeBSD-SA-19:04
https://security.FreeBSD.org/advisories/FreeBSD-SA-19:04.ntp.asc
https://security.gentoo.org/glsa/201903-15
http://packetstormsecurity.com/files/152915/FreeBSD-Security-Advisory-FreeBSD-SA-19-04.ntp.html
http://support.ntp.org/bin/view/Main/SecurityNotice
SuSE Security Announcement: openSUSE-SU-2019:1143 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00032.html
SuSE Security Announcement: openSUSE-SU-2019:1158 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00036.html
https://usn.ubuntu.com/4563-1/
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