chronyd in Chrony before 1.23.1, and possibly 1.24-pre1, generates a syslog message for each unauthorized cmdmon packet, which allows remot…

published 2010-02-08 16y ago modified 2026-06-16 4mo ago also EUVD-2010-0325

cvss: 5.0; version 2.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 2.7%; EPSS 2.7% chance of exploitation in 30 days, percentile 86%
public exploits: 0; none known

chronyd in Chrony before 1.23.1, and possibly 1.24-pre1, generates a syslog message for each unauthorized cmdmon packet, which allows remote attackers to cause a denial of service (disk consumption) via a large number of invalid packets.

Patch / fix

distros 1 links 2

chrony Debian 14, Debian 13, Debian 12 1.23-7

debian advisories DEBIAN-CVE-2010-0294

securityfocus.com/bid/38106 patch
chrony.tuxfamily.org/News.html advisory

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Exploit prediction

2.70% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness

CWE-399 Resource Management Errors

References

securityfocus.com /bid/38106
vdb-entry, patch
chrony.tuxfamily.org /News.html
patch, vendor-advisory
debian.org /security/2010/dsa-1992
vendor-advisory
secunia.com /advisories/38428
third-party-advisory, vendor-advisory
secunia.com /advisories/38480
third-party-advisory, vendor-advisory
git.tuxfamily.org /chrony/chrony.git/?p=gitroot/chrony/chrony.git%3Ba=commit%3Bh=0b710499f994823bd938fc6895f097eefb9cc59f
bugzilla.redhat.com /show_bug.cgi?id=555367

Sources

CVE List CVE-2010-0294
NVD CVE-2010-0294

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.