Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2015-7871

Improper Authentication

Published: Aug 07, 2017 | Modified: Apr 20, 2025
CVSS 3.x
9.8
CRITICAL
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
7.5 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P
RedHat/V2
6.4 IMPORTANT
AV:N/AC:L/Au:N/C:N/I:P/A:P
RedHat/V3
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2015-7871
CWEhttps://cwe.mitre.org/data/definitions/287.html

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.

Weakness

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

Affected Software

NameVendorStart VersionEnd Version
NtpNtp4.2.6 (including)4.2.8 (excluding)
NtpNtp4.3.0 (including)4.3.77 (excluding)
NtpNtp4.2.5-p186 (including)4.2.5-p186 (including)
NtpNtp4.2.5-p187 (including)4.2.5-p187 (including)
NtpNtp4.2.5-p188 (including)4.2.5-p188 (including)
NtpNtp4.2.5-p189 (including)4.2.5-p189 (including)
NtpNtp4.2.5-p190 (including)4.2.5-p190 (including)
NtpNtp4.2.5-p191 (including)4.2.5-p191 (including)
NtpNtp4.2.5-p192 (including)4.2.5-p192 (including)
NtpNtp4.2.5-p193 (including)4.2.5-p193 (including)
NtpNtp4.2.5-p194 (including)4.2.5-p194 (including)
NtpNtp4.2.5-p195 (including)4.2.5-p195 (including)
NtpNtp4.2.5-p196 (including)4.2.5-p196 (including)
NtpNtp4.2.5-p197 (including)4.2.5-p197 (including)
NtpNtp4.2.5-p198 (including)4.2.5-p198 (including)
NtpNtp4.2.5-p199 (including)4.2.5-p199 (including)
NtpNtp4.2.5-p200 (including)4.2.5-p200 (including)
NtpNtp4.2.5-p201 (including)4.2.5-p201 (including)
NtpNtp4.2.5-p202 (including)4.2.5-p202 (including)
NtpNtp4.2.5-p203 (including)4.2.5-p203 (including)
NtpNtp4.2.5-p204 (including)4.2.5-p204 (including)
NtpNtp4.2.5-p205 (including)4.2.5-p205 (including)
NtpNtp4.2.5-p206 (including)4.2.5-p206 (including)
NtpNtp4.2.5-p207 (including)4.2.5-p207 (including)
NtpNtp4.2.5-p208 (including)4.2.5-p208 (including)
NtpNtp4.2.5-p209 (including)4.2.5-p209 (including)
NtpNtp4.2.5-p210 (including)4.2.5-p210 (including)
NtpNtp4.2.5-p211 (including)4.2.5-p211 (including)
NtpNtp4.2.5-p212 (including)4.2.5-p212 (including)
NtpNtp4.2.5-p213 (including)4.2.5-p213 (including)
NtpNtp4.2.5-p214 (including)4.2.5-p214 (including)
NtpNtp4.2.5-p215 (including)4.2.5-p215 (including)
NtpNtp4.2.5-p216 (including)4.2.5-p216 (including)
NtpNtp4.2.5-p217 (including)4.2.5-p217 (including)
NtpNtp4.2.5-p218 (including)4.2.5-p218 (including)
NtpNtp4.2.5-p219 (including)4.2.5-p219 (including)
NtpNtp4.2.5-p220 (including)4.2.5-p220 (including)
NtpNtp4.2.5-p221 (including)4.2.5-p221 (including)
NtpNtp4.2.5-p222 (including)4.2.5-p222 (including)
NtpNtp4.2.5-p223 (including)4.2.5-p223 (including)
NtpNtp4.2.5-p224 (including)4.2.5-p224 (including)
NtpNtp4.2.5-p225 (including)4.2.5-p225 (including)
NtpNtp4.2.5-p226 (including)4.2.5-p226 (including)
NtpNtp4.2.5-p227 (including)4.2.5-p227 (including)
NtpNtp4.2.5-p228 (including)4.2.5-p228 (including)
NtpNtp4.2.5-p229 (including)4.2.5-p229 (including)
NtpNtp4.2.5-p230 (including)4.2.5-p230 (including)
NtpNtp4.2.5-p231_rc1 (including)4.2.5-p231_rc1 (including)
NtpNtp4.2.5-p232_rc1 (including)4.2.5-p232_rc1 (including)
NtpNtp4.2.5-p233_rc1 (including)4.2.5-p233_rc1 (including)
NtpNtp4.2.5-p234_rc1 (including)4.2.5-p234_rc1 (including)
NtpNtp4.2.5-p235_rc1 (including)4.2.5-p235_rc1 (including)
NtpNtp4.2.5-p236_rc1 (including)4.2.5-p236_rc1 (including)
NtpNtp4.2.5-p237_rc1 (including)4.2.5-p237_rc1 (including)
NtpNtp4.2.5-p238_rc1 (including)4.2.5-p238_rc1 (including)
NtpNtp4.2.5-p239_rc1 (including)4.2.5-p239_rc1 (including)
NtpNtp4.2.5-p240_rc1 (including)4.2.5-p240_rc1 (including)
NtpNtp4.2.5-p241_rc1 (including)4.2.5-p241_rc1 (including)
NtpNtp4.2.5-p242_rc1 (including)4.2.5-p242_rc1 (including)
NtpNtp4.2.5-p243_rc1 (including)4.2.5-p243_rc1 (including)
NtpNtp4.2.5-p244_rc1 (including)4.2.5-p244_rc1 (including)
NtpNtp4.2.5-p245_rc1 (including)4.2.5-p245_rc1 (including)
NtpNtp4.2.5-p246_rc1 (including)4.2.5-p246_rc1 (including)
NtpNtp4.2.5-p247_rc1 (including)4.2.5-p247_rc1 (including)
NtpNtp4.2.5-p248_rc1 (including)4.2.5-p248_rc1 (including)
NtpNtp4.2.5-p249_rc1 (including)4.2.5-p249_rc1 (including)
NtpNtp4.2.5-p250_rc1 (including)4.2.5-p250_rc1 (including)
NtpNtp4.2.8-p1 (including)4.2.8-p1 (including)
NtpNtp4.2.8-p1-beta1 (including)4.2.8-p1-beta1 (including)
NtpNtp4.2.8-p1-beta2 (including)4.2.8-p1-beta2 (including)
NtpNtp4.2.8-p1-beta3 (including)4.2.8-p1-beta3 (including)
NtpNtp4.2.8-p1-beta4 (including)4.2.8-p1-beta4 (including)
NtpNtp4.2.8-p1-beta5 (including)4.2.8-p1-beta5 (including)
NtpNtp4.2.8-p1-rc1 (including)4.2.8-p1-rc1 (including)
NtpNtp4.2.8-p1-rc2 (including)4.2.8-p1-rc2 (including)
NtpNtp4.2.8-p2 (including)4.2.8-p2 (including)
NtpNtp4.2.8-p2-rc1 (including)4.2.8-p2-rc1 (including)
NtpNtp4.2.8-p2-rc2 (including)4.2.8-p2-rc2 (including)
NtpNtp4.2.8-p2-rc3 (including)4.2.8-p2-rc3 (including)
NtpNtp4.2.8-p3 (including)4.2.8-p3 (including)
NtpNtp4.2.8-p3-rc1 (including)4.2.8-p3-rc1 (including)
NtpNtp4.2.8-p3-rc2 (including)4.2.8-p3-rc2 (including)
NtpNtp4.2.8-p3-rc3 (including)4.2.8-p3-rc3 (including)
NtpUbuntudevel*
NtpUbuntuesm-infra-legacy/trusty*
NtpUbuntuprecise*
NtpUbuntutrusty*
NtpUbuntutrusty/esm*
NtpUbuntuvivid*
NtpUbuntuvivid/stable-phone-overlay*
NtpUbuntuwily*

Potential Mitigations

References

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