CVE-2016-2517

MEDIUM

Description

NTP before 4.2.8p7 and 4.3.x before 4.3.92 allows remote attackers to cause a denial of service (prevent subsequent authentication) by leveraging knowledge of the controlkey or requestkey and sending a crafted packet to ntpd, which changes the value of trustedkey, controlkey, or requestkey. NOTE: this vulnerability exists because of a CVE-2016-2516 regression.

References

http://support.ntp.org/bin/view/Main/NtpBug3010

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

http://www.securityfocus.com/bid/88189

http://www.securitytracker.com/id/1035705

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

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

https://security.netapp.com/advisory/ntap-20171004-0002/

https://www.kb.cert.org/vuls/id/718152

Details

Source: MITRE

Published: 2017-01-30

Updated: 2017-11-21

Type: CWE-20

Risk Information

CVSS v2.0

Base Score: 4.9

Vector: (AV:N/AC:H/Au:S/C:N/I:N/A:C)

Impact Score: 6.9

Exploitability Score: 3.9

Severity: MEDIUM

CVSS v3.0

Base Score: 5.3

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

Impact Score: 3.6

Exploitability Score: 1.6

Severity: MEDIUM