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Fencer Intel
medium 5.9

CVE-2015-8158 json

The getresponse function in ntpq in NTP versions before 4.2.8p9 and 4.3.x before 4.3.90 allows remote attackers to cause a denial of servic…

published 2017-01-30 9 y ago modified 2026-06-17 4 mo ago also EUVD-2015-8048

cvss
5.9
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
7.5%
EPSS 7.5% chance of exploitation in 30 days, percentile 94%
public exploits
0
none known

Summary

The getresponse function in ntpq in NTP versions before 4.2.8p9 and 4.3.x before 4.3.90 allows remote attackers to cause a denial of service (infinite loop) via crafted packets with incorrect values.

Patch / fix

  • ntp Debian 11 1:4.2.8p7+dfsg-1

debian advisories DEBIAN-CVE-2015-8158

  • ntp Ubuntu 14.04 LTS 1:4.2.6.p5+dfsg-3ubuntu2.14.04.10
  • ntp Ubuntu 16.04 LTS 1:4.2.8p4+dfsg-3ubuntu5.3

ubuntu advisories UBUNTU-CVE-2015-8158

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • ntp RHEL 7 4.2.6p5-25.el7
  • sntp RHEL 7 4.2.6p5-25.el7
  • ntpdate RHEL 7 4.2.6p5-25.el7
  • ntp-perl RHEL 7 4.2.6p5-25.el7

red hat advisories RHSA-2016:2583

  • ntp SLES 11 SP3-TERADATA, SLES 11 SP3-LTSS, SLES 11 SP2-LTSS +3 more 4.2.8p6-41.1
  • ntp SLES for SAP 12, SLES 12, SLED 12 4.2.8p6-46.5.2
  • yast2-ntp-client SLES for SAP 12, SLES 12, SLED 12 +1 more 3.1.12.4-8.2
  • ntp SLES 12 SP1, SLES 11 SP4, SLED 12 SP1 +2 more 4.2.8p6-8.2
  • yast2-ntp-client SLES for SAP 12 SP1, SLES 12 SP1, SLED 12 SP1 +1 more 3.1.22-6.2
  • yast2-ntp-client SLES 11 SP2-LTSS 2.17.14.1-1.12.1

suse advisories SUSE-SU-2016:1311-1SUSE-SU-2016:1247-1SUSE-SU-2016:1175-1SUSE-SU-2016:1177-1

  • ntp openSUSE Tumbleweed 4.2.8p9-1.1

opensuse advisories openSUSE-SU-2024:10181-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2015-8158 updated cvss 4.3

ntp: potential infinite loop in ntpq

  • Red Hat Enterprise Linux 5 ntp Red Hat Enterprise Linux 6 ntp, ntpdate, ntp-perl
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux Client (v. 7) ntp 4.2.6p5-25.el7, ntpdate 4.2.6p5-25.el7 Red Hat Enterprise Linux Client Optional (v. 7) sntp 4.2.6p5-25.el7, ntp-perl 4.2.6p5-25.el7 Red Hat Enterprise Linux ComputeNode (v. 7) ntp 4.2.6p5-25.el7, ntpdate 4.2.6p5-25.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) sntp 4.2.6p5-25.el7, ntp-perl 4.2.6p5-25.el7 Red Hat Enterprise Linux Server (v. 7) ntp 4.2.6p5-25.el7, ntpdate 4.2.6p5-25.el7 Red Hat Enterprise Linux Server Optional (v. 7) sntp 4.2.6p5-25.el7, ntp-perl 4.2.6p5-25.el7
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 7) ntp 4.2.6p5-25.el7, ntpdate 4.2.6p5-25.el7 Red Hat Enterprise Linux Workstation Optional (v. 7) sntp 4.2.6p5-25.el7, ntp-perl 4.2.6p5-25.el7
    fixed: vendor fix RHSA-2016:2583

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

7.55% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 5.9 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.