CVE-2015-7871

CRITICAL

NTP <4.2.8p4, <4.3.77 - Auth Bypass

Title source: llm

Description

Crypto-NAK packets in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to bypass authentication.

Exploits (1)

metasploit WORKING POC

by Matthew Van Gundy of Cisco ASIG · rubypoc

https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/scanner/ntp/ntp_nak_to_the_future.rb

View Code ZIP pw:eip

References (10)

[Vendor Advisory] http://support.ntp.org/bin/view/Main/NtpBug2941

[Third Party Advisory] http://www.debian.org/security/2015/dsa-3388

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/bid/77287

[Third Party Advisory, VDB Entry] http://www.securitytracker.com/id/1033951

[Issue Tracking, Third Party Advisory, VDB Entry] https://bugzilla.redhat.com/show_bug.cgi?id=1274265

[Vendor Advisory] https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf

[Third Party Advisory, VDB Entry] https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05270839

[Third Party Advisory, VDB Entry] https://security.gentoo.org/glsa/201604-03

[Third Party Advisory, VDB Entry] https://security.gentoo.org/glsa/201607-15

[Third Party Advisory] https://security.netapp.com/advisory/ntap-20171004-0001/

Scores

CVSS v3 9.8

EPSS 0.7962

EPSS Percentile 99.1%

Attack Vector NETWORK

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

Details

CWE

CWE-287

Status published

Products (9)

debian/debian_linux 7.0

debian/debian_linux 8.0

debian/debian_linux 9.0

netapp/clustered_data_ontap

netapp/data_ontap

netapp/oncommand_balance

netapp/oncommand_performance_manager

netapp/oncommand_unified_manager

ntp/ntp 4.2.5 p186 (42 CPE variants)

Published Aug 07, 2017

Tracked Since Feb 18, 2026