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Vulnerabilities / CVE-2015-7853

critical

CVE-2015-7853

ntp: reference clock memory corruption vulnerability

Published Modified CWE 120
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat4.3AV:N/AC:M/Au:N/C:N/I:N/A:P

Trivy's own label is CRITICAL. Rated critical by NVD. Rated lower by Red Hat (medium), Ubuntu (medium).

Description

The datalen parameter in the refclock driver in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to execute arbitrary code or cause a denial of service (crash) via a negative input value.

Affected packages and fixed versions

SourcePackageFixed in
debian 11ntp1:4.2.8p4+dfsg-1
ubuntu 12.04ntp1:4.2.6.p3+dfsg-1ubuntu3.6
ubuntu 14.04ntp1:4.2.6.p5+dfsg-3ubuntu2.14.04.5
ubuntu 14.04-ESMntp1:4.2.6.p5+dfsg-3ubuntu2.14.04.5
ubuntu 15.04ntp1:4.2.6.p5+dfsg-3ubuntu6.2
ubuntu 15.10ntp1:4.2.6.p5+dfsg-3ubuntu8.1

References

All 35 references

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.