CVE-2015-7871

9.8 CRITICAL

Published: August 07, 2017 Modified: May 13, 2026

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.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

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

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

http://support.ntp.org/bin/view/Main/NtpBug2941

Source: cve@mitre.org

Vendor Advisory

http://www.debian.org/security/2015/dsa-3388

Source: cve@mitre.org

Third Party Advisory

http://www.securityfocus.com/bid/77287

Source: cve@mitre.org

Third Party Advisory VDB Entry

http://www.securitytracker.com/id/1033951

Source: cve@mitre.org

Third Party Advisory VDB Entry

https://bugzilla.redhat.com/show_bug.cgi?id=1274265

Source: cve@mitre.org

Issue Tracking Third Party Advisory VDB Entry

https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf

Source: cve@mitre.org

https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05270839

Source: cve@mitre.org

Third Party Advisory VDB Entry

https://security.gentoo.org/glsa/201604-03

Source: cve@mitre.org

Third Party Advisory VDB Entry

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

Source: cve@mitre.org

Third Party Advisory VDB Entry

https://security.netapp.com/advisory/ntap-20171004-0001/

Source: cve@mitre.org

Third Party Advisory

http://support.ntp.org/bin/view/Main/NtpBug2941

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

http://www.debian.org/security/2015/dsa-3388

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

http://www.securityfocus.com/bid/77287

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory VDB Entry

http://www.securitytracker.com/id/1033951

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory VDB Entry

https://bugzilla.redhat.com/show_bug.cgi?id=1274265

Source: af854a3a-2127-422b-91ae-364da2661108

Issue Tracking Third Party Advisory VDB Entry

https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf

Source: af854a3a-2127-422b-91ae-364da2661108

https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05270839

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory VDB Entry

https://security.gentoo.org/glsa/201604-03

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory VDB Entry

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

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory VDB Entry

https://security.netapp.com/advisory/ntap-20171004-0001/

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

20 reference(s) from NVD

Quick Stats

CVSS v3 Score

9.8 / 10.0

EPSS (Exploit Probability)

81.8%

100th percentile

Exploitation Status

Not in CISA KEV

Weaknesses (CWE)

CWE-287

Affected Vendors

ntp netapp debian

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