CVE-2016-4955

LOW

Description

ntpd in NTP 4.x before 4.2.8p8, when autokey is enabled, allows remote attackers to cause a denial of service (peer-variable clearing and association outage) by sending (1) a spoofed crypto-NAK packet or (2) a packet with an incorrect MAC value at a certain time.

References

http://bugs.ntp.org/3043

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

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

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

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

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

http://support.ntp.org/bin/view/Main/NtpBug3043

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

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

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

http://www.securityfocus.com/bid/91007

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

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

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

Details

Source: MITRE

Published: 2016-07-05

Updated: 2018-10-30

Type: CWE-362

Risk Information

CVSS v2.0

Base Score: 2.6

Vector: AV:N/AC:H/Au:N/C:N/I:N/A:P

Impact Score: 2.9

Exploitability Score: 4.9

Severity: LOW

CVSS v3.0

Base Score: 4

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L

Impact Score: 1.4

Exploitability Score: 2.2

Severity: MEDIUM