What’s Vulnerable › Vulnerabilities

CVE-2018-16749

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-09-09 · updated 2026-06-17
• Weakness: CWE-476

Description

In ImageMagick 7.0.7-29 and earlier, a missing NULL check in ReadOneJNGImage in coders/png.c allows an attacker to cause a denial of service (WriteBlob assertion failure and application exit) via a crafted file.

Affected products

• Canonical Ubuntu Linux: 14.04, 16.04, 18.04
• Debian Linux: 8.0, 9.0
• ImageMagick: before 6.9.9-42; from 7.0.0-0 through 7.0.7-29 — fixed in 6.9.9-42

How to fix

Upgrade to a fixed version: ImageMagick 6.9.9-42. Check the vendor advisory for mitigations.

References

• https://github.com/ImageMagick/ImageMagick/issues/1119
• https://github.com/ImageMagick/ImageMagick6/commit/1007b98f8795ad4bea6bc5f68a32d83e982fdae4
• https://lists.debian.org/debian-lts-announce/2018/10/msg00002.html
• https://lists.debian.org/debian-lts-announce/2020/09/msg00007.html
• https://usn.ubuntu.com/3785-1/
• https://github.com/ImageMagick/ImageMagick/issues/1119
• https://github.com/ImageMagick/ImageMagick6/commit/1007b98f8795ad4bea6bc5f68a32d83e982fdae4
• https://lists.debian.org/debian-lts-announce/2018/10/msg00002.html
• https://lists.debian.org/debian-lts-announce/2020/09/msg00007.html
• https://usn.ubuntu.com/3785-1/

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