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CVE-2015-7691 ntp

Affected softwarentp
Severity7.5 High CVSS 3.1 2 scores
WeaknessImproper input validation (CWE-20)
Published7 Aug 2017
Updated17 Jun 2026

Description

The crypto_xmit function in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service (crash) via crafted packets containing particular autokey operations. NOTE: This vulnerability exists due to an incomplete fix for CVE-2014-9750.

Exploitation status

No public exploit

No exploit has been reported in the sources we check. Published 9 years ago.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment no assessment published
  • Indexed PoC none indexed
  • EPSS 7.1% chance in 30 days

Waratek protection

Outside Waratek scope

A Java vulnerability, but not one Waratek protects. It affects only Java on a user's desktop (applets, Web Start, JavaFX, the installer), sits in a product the Waratek agent can't be installed into, or is in a package we don't expect in business applications. The decision below says which.

  • Protection none
  • Action not pursued none
  • Review human Researcher
  • Record active
Decided by Manual classification of this CVE in the legacy dataset
Finding A manual classification set this CVE's status to Outside Waratek scope, but the CVE names a tracked product.

CVSS

7.5 HIGH v3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 2 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

VersionScoreBandVectorAssignerType
CVSS 3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H NVD Primary published
CVSS 2.0 5.0 none AV:N/AC:L/Au:N/C:N/I:N/A:P NVD Primary

Affected software and releases

Products and versions

13 products, 45 version entries
SourceVendorProductSchemeAffected versions
nvd debian debian linux generic 7.0 · 8.0 · 9.0
nvd netapp clustered data ontap generic any version
nvd netapp data ontap generic any version
nvd netapp oncommand performance manager generic any version
nvd netapp oncommand unified manager generic any version
nvd ntp ntp generic ≥ 4.2.0 and < 4.2.8 · 4.2.8 · 4.2.8:p1 · 4.2.8:p1-beta1 · 4.2.8:p1-beta2 · 4.2.8:p1-beta3 · 4.2.8:p1-beta4 · 4.2.8:p1-beta5 · 4.2.8:p1-rc1 · 4.2.8:p1-rc2 · 4.2.8:p2 · 4.2.8:p2-rc1 · 4.2.8:p2-rc2 · 4.2.8:p2-rc3 · 4.2.8:p3 · 4.2.8:p3-rc1 · 4.2.8:p3-rc2 · 4.2.8:p3-rc3 · ≥ 4.3.0 and < 4.3.77
nvd oracle linux generic 6
nvd redhat enterprise linux desktop generic 6.0 · 7.0
nvd redhat enterprise linux server generic 6.0 · 7.0
nvd redhat enterprise linux server aus generic 7.3 · 7.4 · 7.6 · 7.7
nvd redhat enterprise linux server eus generic 7.3 · 7.4 · 7.5 · 7.6 · 7.7
nvd redhat enterprise linux server tus generic 7.3 · 7.6 · 7.7
nvd redhat enterprise linux workstation generic 6.0 · 7.0

References

URLTags
http://rhn.redhat.com/errata/RHSA-2016-0780.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-2583.html Third Party Advisory
http://support.ntp.org/bin/view/Main/NtpBug2899 Vendor Advisory
http://www.debian.org/security/2015/dsa-3388 Third Party Advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html Third Party Advisory
http://www.securityfocus.com/bid/77274 Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1033951 Third Party Advisory, VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=1274254 Issue Tracking, Third Party Advisory, VDB Entry
https://security.gentoo.org/glsa/201607-15 Third Party Advisory, VDB Entry
https://security.netapp.com/advisory/ntap-20171004-0001/ Third Party Advisory

Timeline

Published2017-08-07By the CVE Program.
NVD record modified2026-06-17NVD's own last-modified date for this record.