CVE-2018-5711

Severity: medium (CVSS 5.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 13.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-01-16 · updated 2026-06-17
Weakness: CWE-681

Description

gd_gif_in.c in the GD Graphics Library (aka libgd), as used in PHP before 5.6.33, 7.0.x before 7.0.27, 7.1.x before 7.1.13, and 7.2.x before 7.2.1, has an integer signedness error that leads to an infinite loop via a crafted GIF file, as demonstrated by a call to the imagecreatefromgif or imagecreatefromstring PHP function. This is related to GetCode_ and gdImageCreateFromGifCtx.

Affected products

Canonical Ubuntu Linux: 14.04, 16.04, 18.04
Debian Linux: 7.0, 8.0
PHP: through 5.6.32; from 7.0.0 through 7.0.26; from 7.1.0 (excl.) through 7.1.12; 7.2.0

References

http://php.net/ChangeLog-5.php
http://php.net/ChangeLog-7.php
https://access.redhat.com/errata/RHSA-2018:1296
https://access.redhat.com/errata/RHSA-2019:2519
https://bugs.php.net/bug.php?id=75571
https://lists.debian.org/debian-lts-announce/2018/01/msg00022.html
https://lists.debian.org/debian-lts-announce/2019/01/msg00028.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3CZ2QADQTKRHTGB2AHD7J4QQNDLBEMM6/
https://security.gentoo.org/glsa/201903-18
https://usn.ubuntu.com/3755-1/
https://www.oracle.com/security-alerts/cpuapr2020.html
http://php.net/ChangeLog-5.php

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