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Fencer Intel
high 7.5

CVE-2019-8936 json

NTP through 4.2.8p12 has a NULL Pointer Dereference.

published 7y ago modified 4mo ago also EUVD-2019-18324

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
5.7%
EPSS 5.7% chance of exploitation in 30 days, percentile 93%
public exploits
0
none known

Summary

NTP through 4.2.8p12 has a NULL Pointer Dereference.

Patch / fix

  • hpe hpux-ntp c.4.2.8.4.0
  • ntp ntp 4.2.8
  • netapp clustered_data_ontap 9.2
  • ntp Debian 11 1:4.2.8p12+dfsg-4

debian advisories DEBIAN-CVE-2019-8936

  • ntp Ubuntu 18.04 LTS 1:4.2.8p10+dfsg-5ubuntu7.3
  • ntp Ubuntu 20.04 LTS 1:4.2.8p12+dfsg-3ubuntu4.20.04.1
  • ntp Ubuntu 22.04 LTS 1:4.2.8p12+dfsg-3ubuntu6

ubuntu advisories UBUNTU-CVE-2019-8936

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 SLE Point of Sale 11 SP3 4.2.8p13-48.27.1
  • ntp SLES for SAP 12 SP4, SLES for SAP 12 SP3, SLES for SAP 12 SP2 +10 more 4.2.8p13-85.1
  • ntp SLE Module for Legacy 15 4.2.8p13-4.6.1
  • ntp SLES for SAP 11 SP4, SLES 11 SP4 4.2.8p13-64.13.1
  • ntp SLES 12-LTSS 4.2.8p13-46.32.1

suse advisories SUSE-SU-2019:14004-1SUSE-SU-2019:0789-1SUSE-SU-2019:0777-1SUSE-SU-2019:0775-1SUSE-SU-2019:13991-1

  • ntp openSUSE Tumbleweed 4.2.8p15-7.2
  • ntp openSUSE Leap 15.0 4.2.8p13-lp150.8.1

opensuse advisories openSUSE-SU-2024:11102-1openSUSE-SU-2019:1143-1

Is CVE-2019-8936 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

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-2019-8936 updated cvss 5.3

ntp: Crafted null dereference attack in authenticated mode 6 packet

  • Red Hat Enterprise Linux 5 ntp Red Hat Enterprise Linux 6 ntp, ntpdate, ntp-perl Red Hat Enterprise Linux 7 ntp, sntp, ntpdate, ntp-perl Red Hat Virtualization 4 redhat-virtualization-host-image-update
    not affected: vulnerable code not present

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

5.73% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • bugs.ntp.org http://bugs.ntp.org/show_bug.cgi?id=3565 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/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

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.