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Fencer Vulns
high 7.8

CVE-2017-6462 json

Buffer overflow in the legacy Datum Programmable Time Server (DPTS) refclock driver in NTP before 4.2.8p10 and 4.3.x before 4.3.94 allows l…

published 2017-03-27 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-15519

cvss
7.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 42%
public exploits
0
none known

Summary

Buffer overflow in the legacy Datum Programmable Time Server (DPTS) refclock driver in NTP before 4.2.8p10 and 4.3.x before 4.3.94 allows local users to have unspecified impact via a crafted /dev/datum device.

Patch / fix

  • ntp Debian 11 1:4.2.8p10+dfsg-1

debian advisories DEBIAN-CVE-2017-6462

  • ntp Ubuntu 14.04 LTS 1:4.2.6.p5+dfsg-3ubuntu2.14.04.11
  • ntp Ubuntu 16.04 LTS 1:4.2.8p4+dfsg-3ubuntu5.5

ubuntu advisories UBUNTU-CVE-2017-6462

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 4.2.6p5-28.el7
  • sntp RHEL 7 4.2.6p5-28.el7
  • ntpdate RHEL 7 4.2.6p5-28.el7
  • ntp-perl RHEL 7 4.2.6p5-28.el7
  • ntp RHEL 6 4.2.6p5-12.el6_9.1
  • ntpdate RHEL 6 4.2.6p5-12.el6_9.1
  • ntp-perl RHEL 6 4.2.6p5-12.el6_9.1

red hat advisories RHSA-2018:0855RHSA-2017:3071

  • ntp SLES for SAP 11 SP4, SLES 11 SP4 4.2.8p10-63.1
  • ntp SLES for SAP 12 SP2, SLES for SAP 12 SP1, SLES for Raspberry Pi 12 SP2 +4 more 4.2.8p10-60.1
  • ntp SLES for SAP 12, SLES 12-LTSS 4.2.8p10-46.23.1

suse advisories SUSE-SU-2017:1052-1SUSE-SU-2017:1047-1SUSE-SU-2017:1048-1

  • ntp openSUSE Tumbleweed 4.2.8p15-7.2

opensuse advisories openSUSE-SU-2024:11102-1

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-2017-6462 updated cvss 6.4

ntp: Buffer Overflow in DPTS Clock

  • Red Hat Enterprise Linux 5 ntp
    affected: workaround, no fix planned “Properly monitor your ntpd instances, and auto-restart ntpd (without -g) if it stops running.”
  • Red Hat Enterprise Linux Client (v. 7) ntp 4.2.6p5-28.el7, ntpdate 4.2.6p5-28.el7 Red Hat Enterprise Linux Client Optional (v. 7) sntp 4.2.6p5-28.el7, ntp-perl 4.2.6p5-28.el7 Red Hat Enterprise Linux ComputeNode (v. 7) ntp 4.2.6p5-28.el7, ntpdate 4.2.6p5-28.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) sntp 4.2.6p5-28.el7, ntp-perl 4.2.6p5-28.el7
    fixed: vendor fix “Properly monitor your ntpd instances, and auto-restart ntpd (without -g) if it stops running.” RHSA-2018:0855
  • Red Hat Enterprise Linux Desktop (v. 6) ntp 4.2.6p5-12.el6_9.1, ntpdate 4.2.6p5-12.el6_9.1 Red Hat Enterprise Linux Desktop Optional (v. 6) ntp-perl 4.2.6p5-12.el6_9.1
    fixed: vendor fix “Properly monitor your ntpd instances, and auto-restart ntpd (without -g) if it stops running.” RHSA-2017:3071
  • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) ntp 4.2.6p5-28.el7, ntpdate 4.2.6p5-28.el7 Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) sntp 4.2.6p5-28.el7, ntp-perl 4.2.6p5-28.el7
    fixed: vendor fix “Properly monitor your ntpd instances, and auto-restart ntpd (without -g) if it stops running.” RHSA-2018:0855
  • Red Hat Enterprise Linux HPC Node (v. 6) ntp 4.2.6p5-12.el6_9.1, ntpdate 4.2.6p5-12.el6_9.1 Red Hat Enterprise Linux HPC Node Optional (v. 6) ntp-perl 4.2.6p5-12.el6_9.1 Red Hat Enterprise Linux Server (v. 6) ntp 4.2.6p5-12.el6_9.1, ntpdate 4.2.6p5-12.el6_9.1
    fixed: vendor fix “Properly monitor your ntpd instances, and auto-restart ntpd (without -g) if it stops running.” RHSA-2017:3071
  • Red Hat Enterprise Linux Server (v. 7) ntp 4.2.6p5-28.el7, ntpdate 4.2.6p5-28.el7
    fixed: vendor fix “Properly monitor your ntpd instances, and auto-restart ntpd (without -g) if it stops running.” RHSA-2018:0855
  • Red Hat Enterprise Linux Server Optional (v. 6) ntp-perl 4.2.6p5-12.el6_9.1
    fixed: vendor fix “Properly monitor your ntpd instances, and auto-restart ntpd (without -g) if it stops running.” RHSA-2017:3071
  • Red Hat Enterprise Linux Server Optional (v. 7) sntp 4.2.6p5-28.el7, ntp-perl 4.2.6p5-28.el7
    fixed: vendor fix “Properly monitor your ntpd instances, and auto-restart ntpd (without -g) if it stops running.” RHSA-2018:0855
show 4 more
  • Red Hat Enterprise Linux Workstation (v. 6) ntp 4.2.6p5-12.el6_9.1, ntpdate 4.2.6p5-12.el6_9.1
    fixed: vendor fix “Properly monitor your ntpd instances, and auto-restart ntpd (without -g) if it stops running.” RHSA-2017:3071
  • Red Hat Enterprise Linux Workstation (v. 7) ntp 4.2.6p5-28.el7, ntpdate 4.2.6p5-28.el7
    fixed: vendor fix “Properly monitor your ntpd instances, and auto-restart ntpd (without -g) if it stops running.” RHSA-2018:0855
  • Red Hat Enterprise Linux Workstation Optional (v. 6) ntp-perl 4.2.6p5-12.el6_9.1
    fixed: vendor fix “Properly monitor your ntpd instances, and auto-restart ntpd (without -g) if it stops running.” RHSA-2017:3071
  • Red Hat Enterprise Linux Workstation Optional (v. 7) sntp 4.2.6p5-28.el7, ntp-perl 4.2.6p5-28.el7
    fixed: vendor fix “Properly monitor your ntpd instances, and auto-restart ntpd (without -g) if it stops running.” RHSA-2018:0855

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

0.49% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 7.8 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Vulns 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.