CVE catalog

CVE-2018-7184

ntpsec: CVE-2018-7184

Severity: Low · CVSS 3.1CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
Published: Mar 6, 2018, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 8.63% · Oct 25, 2026

ntpd in ntp 4.2.8p4 before 4.2.8p11 drops bad packets before updating the "received" timestamp, which allows remote attackers to cause a denial of service (disruption) by sending a packet with a zero-origin timestamp causing the association to reset and setting the contents of the packet as the most recent timestamp. This issue is a result of an incomplete fix for CVE-2015-7704.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	ntpsec	sid	`1.2.5+dfsg-1`	not affected
Debian	ntpsec	forky	`1.2.5+dfsg-1`	not affected
Debian	ntpsec	trixie	`1.2.3+dfsg1-8`	not affected
Debian	ntpsec	bookworm	`1.2.2+dfsg1-1+deb12u1`	not affected
Debian	ntpsec	bookworm-security	`1.2.2+dfsg1-1+deb12u1`	not affected
Ubuntu	ntp	18.04	`1:4.2.8p10+dfsg-5ubuntu3`	vulnerable
Ubuntu	ntp	18.04	`1:4.2.8p10+dfsg-5ubuntu4`	vulnerable
Ubuntu	ntp	18.04	`1:4.2.8p10+dfsg-5ubuntu5`	vulnerable
Ubuntu	ntp	18.04	`1:4.2.8p10+dfsg-5ubuntu6`	vulnerable
Ubuntu	ntp	18.04	`1:4.2.8p10+dfsg-5ubuntu7`	vulnerable
Ubuntu	ntp	18.04	`1:4.2.8p10+dfsg-5ubuntu7.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	ntpsec	source	sid	`Not affected`	unimportant	Not reported	Not reported
Debian	ntpsec	source	forky	`Not affected`	unimportant	Not reported	Not reported
Debian	ntpsec	source	trixie	`Not affected`	unimportant	Not reported	Not reported
Debian	ntpsec	source	bookworm	`Not affected`	unimportant	Not reported	Not reported
Ubuntu	ntp	deb	18.04	`1:4.2.8p10+dfsg-5ubuntu7.1`	Not reported	UBUNTU-CVE-2018-7184	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[ntp]Not affected
Source package: [ntpsec]
Details (4)
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm
  Not affected
  dsa · ntpsec · debian · bookworm
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm
  Not affected
  dsa · ntpsec · debian · bookworm
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm-security
  Not affected
  dsa · ntpsec · debian · bookworm
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm-security
  Not affected
  dsa · ntpsec · debian · bookworm
[ntpdate]Not affected
Source package: [ntpsec]
Details (4)
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm
  Not affected
  dsa · ntpsec · debian · bookworm
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm
  Not affected
  dsa · ntpsec · debian · bookworm
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm-security
  Not affected
  dsa · ntpsec · debian · bookworm
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm-security
  Not affected
  dsa · ntpsec · debian · bookworm
[ntp-doc]Not affected
Source package: [ntpsec]
Details (4)
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm
  Not affected
  dsa · ntpsec · debian · bookworm
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm
  Not affected
  dsa · ntpsec · debian · bookworm
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm-security
  Not affected
  dsa · ntpsec · debian · bookworm
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm-security
  Not affected
  dsa · ntpsec · debian · bookworm
[ntpsec]Not affected
Details (4)
- 1.2.2+dfsg1-1+deb12u1 · amd64 · bookworm
  Not affected
  dsa · ntpsec · debian · bookworm
- 1.2.2+dfsg1-1+deb12u1 · arm64 · bookworm
  Not affected
  dsa · ntpsec · debian · bookworm
- 1.2.2+dfsg1-1+deb12u1 · amd64 · bookworm-security
  Not affected
  dsa · ntpsec · debian · bookworm
- 1.2.2+dfsg1-1+deb12u1 · arm64 · bookworm-security
  Not affected
  dsa · ntpsec · debian · bookworm
[ntpsec-doc]Not affected
Source package: [ntpsec]
Details (4)
- 1.2.2+dfsg1-1+deb12u1 · all · bookworm
  Not affected
  dsa · ntpsec · debian · bookworm
- 1.2.2+dfsg1-1+deb12u1 · all · bookworm
  Not affected
  dsa · ntpsec · debian · bookworm
- 1.2.2+dfsg1-1+deb12u1 · all · bookworm-security
  Not affected
  dsa · ntpsec · debian · bookworm
- 1.2.2+dfsg1-1+deb12u1 · all · bookworm-security
  Not affected
  dsa · ntpsec · debian · bookworm
[ntpsec-ntpdate]Not affected
Source package: [ntpsec]
Details (4)
- 1.2.2+dfsg1-1+deb12u1 · amd64 · bookworm
  Not affected
  dsa · ntpsec · debian · bookworm
- 1.2.2+dfsg1-1+deb12u1 · arm64 · bookworm
  Not affected
  dsa · ntpsec · debian · bookworm
- 1.2.2+dfsg1-1+deb12u1 · amd64 · bookworm-security
  Not affected
  dsa · ntpsec · debian · bookworm
- 1.2.2+dfsg1-1+deb12u1 · arm64 · bookworm-security
  Not affected
  dsa · ntpsec · debian · bookworm
[ntpsec-ntpdig]Not affected
Source package: [ntpsec]
Details (4)
- 1.2.2+dfsg1-1+deb12u1 · amd64 · bookworm
  Not affected
  dsa · ntpsec · debian · bookworm
- 1.2.2+dfsg1-1+deb12u1 · arm64 · bookworm
  Not affected
  dsa · ntpsec · debian · bookworm
- 1.2.2+dfsg1-1+deb12u1 · amd64 · bookworm-security
  Not affected
  dsa · ntpsec · debian · bookworm
- 1.2.2+dfsg1-1+deb12u1 · arm64 · bookworm-security
  Not affected
  dsa · ntpsec · debian · bookworm
[ntpsec-ntpviz]Not affected
Source package: [ntpsec]
Details (4)
- 1.2.2+dfsg1-1+deb12u1 · amd64 · bookworm
  Not affected
  dsa · ntpsec · debian · bookworm
- 1.2.2+dfsg1-1+deb12u1 · arm64 · bookworm
  Not affected
  dsa · ntpsec · debian · bookworm
- 1.2.2+dfsg1-1+deb12u1 · amd64 · bookworm-security
  Not affected
  dsa · ntpsec · debian · bookworm
- 1.2.2+dfsg1-1+deb12u1 · arm64 · bookworm-security
  Not affected
  dsa · ntpsec · debian · bookworm
[python3-ntp]Not affected
Source package: [ntpsec]
Details (4)
- 1.2.2+dfsg1-1+deb12u1 · amd64 · bookworm
  Not affected
  dsa · ntpsec · debian · bookworm
- 1.2.2+dfsg1-1+deb12u1 · arm64 · bookworm
  Not affected
  dsa · ntpsec · debian · bookworm
- 1.2.2+dfsg1-1+deb12u1 · amd64 · bookworm-security
  Not affected
  dsa · ntpsec · debian · bookworm
- 1.2.2+dfsg1-1+deb12u1 · arm64 · bookworm-security
  Not affected
  dsa · ntpsec · debian · bookworm
[sntp]Not affected
Source package: [ntpsec]
Details (4)
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm
  Not affected
  dsa · ntpsec · debian · bookworm
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm
  Not affected
  dsa · ntpsec · debian · bookworm
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm-security
  Not affected
  dsa · ntpsec · debian · bookworm
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm-security
  Not affected
  dsa · ntpsec · debian · bookworm

Observed: Oct 23, 2026, 5:37:38 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]