CVE-2016-4957

· HIGHModified

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CVSS v3.1

7.5

EPSS

44.94%

Published

Jul 4, 2016

Modified

May 6, 2026

Public PoC / Exploit (1)

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Links to public security research (Exploit-DB, Nuclei, Trickest, GitHub) for defensive use only.

Description

ntpd in NTP before 4.2.8p8 allows remote attackers to cause a denial of service (daemon crash) via a crypto-NAK packet. NOTE: this vulnerability exists because of an incorrect fix for CVE-2016-1547.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses (CWE)

CWE-476

Affected Products (14)

ntp · ntpvulnerable

oracle · solarisvulnerable

suse · manager_proxyvulnerable

suse · openstack_cloudvulnerable

novell · suse_managervulnerable

opensuse · leapvulnerable

opensuse · opensusevulnerable

suse · linux_enterprise_desktopvulnerable

suse · linux_enterprise_servervulnerable

References (20)

http://bugs.ntp.org/3046

Issue TrackingVendor Advisory

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.html

Mailing ListThird Party Advisory

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00023.html

Mailing ListThird Party Advisory

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.html

Mailing ListThird Party Advisory

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.html

Mailing ListThird Party Advisory

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00040.html

Mailing ListThird Party Advisory

http://support.ntp.org/bin/view/Main/NtpBug3046

PatchVendor Advisory

http://support.ntp.org/bin/view/Main/SecurityNotice

Release NotesVendor Advisory

http://www.kb.cert.org/vuls/id/321640

Third Party AdvisoryUS Government Resource

http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html

Third Party Advisory

http://www.securitytracker.com/id/1036037

Third Party AdvisoryVDB Entry

https://security.FreeBSD.org/advisories/FreeBSD-SA-16:24.ntp.asc

Third Party Advisory

https://security.gentoo.org/glsa/201607-15

Third Party Advisory

http://bugs.ntp.org/3046

Issue TrackingVendor Advisory

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.html

Mailing ListThird Party Advisory

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00023.html

Mailing ListThird Party Advisory

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.html

Mailing ListThird Party Advisory

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.html

Mailing ListThird Party Advisory

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00040.html

Mailing ListThird Party Advisory

http://support.ntp.org/bin/view/Main/NtpBug3046

PatchVendor Advisory

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