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Fencer Intel
high 7.5

CVE-2014-0021 json

Chrony before 1.29.1 has traffic amplification in cmdmon protocol

published 6y ago modified 4mo ago also EUVD-2014-0122

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.2%
EPSS 4.2% chance of exploitation in 30 days, percentile 90%
public exploits
0
none known

Summary

Chrony before 1.29.1 has traffic amplification in cmdmon protocol

Patch / fix

  • chrony_project chrony 1.29
  • chrony Debian 14, Debian 13, Debian 12 1.29.1-1

debian advisories DEBIAN-CVE-2014-0021

  • chrony Ubuntu Pro 14.04 LTS 1.29-1ubuntu0.1+esm1

ubuntu advisories UBUNTU-CVE-2014-0021

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

  • chrony openSUSE Tumbleweed 2.4.1-1.1

opensuse advisories openSUSE-SU-2024:10345-1

Is CVE-2014-0021 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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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-2014-0021 updated cvss 2.6

chrony: DDoS via amplification in cmdmon protocol

  • Red Hat Enterprise Linux 7 chrony
    affected: no fix available

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

4.17% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-09).

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

Affected products

  • Chrony Chrony

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.