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Fencer Intel
high 7.5

CVE-2015-5195 json

ntp_openssl.m4 in ntpd in NTP before 4.2.7p112 allows remote attackers to cause a denial of service (segmentation fault) via a crafted stat…

published 2017-07-21 9 y ago modified 2026-06-17 4 mo ago also EUVD-2015-5196

cvss
7.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
8.8%
EPSS 8.8% chance of exploitation in 30 days, percentile 95%
public exploits
0
none known

Summary

ntp_openssl.m4 in ntpd in NTP before 4.2.7p112 allows remote attackers to cause a denial of service (segmentation fault) via a crafted statistics or filegen configuration command that is not enabled during compilation.

Patch / fix

  • ntp Debian 11 1:4.2.8p3+dfsg-1

debian advisories DEBIAN-CVE-2015-5195

  • ntp Ubuntu 14.04 LTS 1:4.2.6.p5+dfsg-3ubuntu2.14.04.5

ubuntu advisories UBUNTU-CVE-2015-5195

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
  • ntp RHEL 6 4.2.6p5-10.el6
  • ntpdate RHEL 6 4.2.6p5-10.el6
  • ntp-perl RHEL 6 4.2.6p5-10.el6

red hat advisories RHSA-2016:2583RHSA-2016:0780

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-2015-5195 updated cvss 4.0

ntp: ntpd crash when processing config commands with statistics type

  • Red Hat Enterprise Linux 5 ntp
    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
    fixed: vendor fix RHSA-2016:2583
  • Red Hat Enterprise Linux Desktop (v. 6) ntp 4.2.6p5-10.el6, ntpdate 4.2.6p5-10.el6 Red Hat Enterprise Linux Desktop Optional (v. 6) ntp-perl 4.2.6p5-10.el6 Red Hat Enterprise Linux HPC Node (v. 6) ntp 4.2.6p5-10.el6, ntpdate 4.2.6p5-10.el6 Red Hat Enterprise Linux HPC Node Optional (v. 6) ntp-perl 4.2.6p5-10.el6 Red Hat Enterprise Linux Server (v. 6) ntp 4.2.6p5-10.el6, ntpdate 4.2.6p5-10.el6
    fixed: vendor fix RHSA-2016:0780
  • Red Hat Enterprise Linux Server (v. 7) ntp 4.2.6p5-25.el7, ntpdate 4.2.6p5-25.el7
    fixed: vendor fix RHSA-2016:2583
  • Red Hat Enterprise Linux Server Optional (v. 6) ntp-perl 4.2.6p5-10.el6
    fixed: vendor fix RHSA-2016:0780
  • Red Hat Enterprise Linux Server Optional (v. 7) sntp 4.2.6p5-25.el7, ntp-perl 4.2.6p5-25.el7
    fixed: vendor fix RHSA-2016:2583
  • Red Hat Enterprise Linux Workstation (v. 6) ntp 4.2.6p5-10.el6, ntpdate 4.2.6p5-10.el6
    fixed: vendor fix RHSA-2016:0780
  • Red Hat Enterprise Linux Workstation (v. 7) ntp 4.2.6p5-25.el7, ntpdate 4.2.6p5-25.el7
    fixed: vendor fix RHSA-2016:2583
show 2 more
  • Red Hat Enterprise Linux Workstation Optional (v. 6) ntp-perl 4.2.6p5-10.el6
    fixed: vendor fix RHSA-2016:0780
  • 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

8.75% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-20 Improper Input Validation

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.