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Fencer Intel
critical 9.1

CVE-2019-6443 in the critical feed json

An issue was discovered in NTPsec before 1.1.3.

published 7y ago modified 4mo ago also EUVD-2019-16004

cvss
9.1
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
66.9%
EPSS 66.9% chance of exploitation in 30 days, percentile 99.3%
public exploits
1
Exploit-DB, plus a Nuclei check

Summary

An issue was discovered in NTPsec before 1.1.3. Because of a bug in ctl_getitem, there is a stack-based buffer over-read in read_sysvars in ntp_control.c in ntpd.

Patch / fix

  • ntpsec ntpsec 1.1.3
  • ntpsec Debian 14, Debian 13, Debian 12 1.1.3+dfsg1-1

debian advisories DEBIAN-CVE-2019-6443

  • ntpsec Ubuntu 18.04 LTS 1.1.0+dfsg1-1ubuntu0.2

ubuntu advisories UBUNTU-CVE-2019-6443

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

  • ntpsec openSUSE Tumbleweed 1.2.1-1.2

opensuse advisories openSUSE-SU-2024:11103-1

  • ntpsec Alpine 3.24, Alpine 3.23, Alpine 3.22 +12 more 1.1.3-r0

alpine advisories ALPINE-CVE-2019-6443

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Is CVE-2019-6443 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.

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Timeline

  1. First public exploit (EDB-46175)
  2. Published

Exploit prediction

66.88% chance of exploitation in the next 30 days, higher than 99.3% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-46175 NTPsec 1.1.2 - 'ctl_getitem' Out-of-Bounds Read (PoC) dos, 2019-01-16
  • Nuclei template NTPsec > 1.1.3 - 'ctl_getitem' Out-of-Bounds Read nuclei detection template
  • dumpco.re https://dumpco.re/blog/ntpsec-bugs referenced PoC, tagged "exploit" by a source, unverified
  • dumpco.re https://dumpco.re/bugs/ntpsec-oobread1 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 9.1 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
NVD 2.0 6.4 AV:N/AC:L/Au:N/C:P/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.