What’s Vulnerable › Vulnerabilities

CVE-2018-6405

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-01-30 · updated 2026-06-17
• Weakness: CWE-772

Description

In the ReadDCMImage function in coders/dcm.c in ImageMagick before 7.0.7-23, each redmap, greenmap, and bluemap variable can be overwritten by a new pointer. The previous pointer is lost, which leads to a memory leak. This allows remote attackers to cause a denial of service.

Affected products

• Canonical Ubuntu Linux: 14.04, 16.04, 17.10, 18.04
• ImageMagick: before 6.9.9-35; from 7.0.0-0 before 7.0.7-23 — fixed in 6.9.9-35, 7.0.7-23

How to fix

Upgrade to a fixed version: ImageMagick 6.9.9-35, 7.0.7-23. Check the vendor advisory for mitigations.

References

• https://github.com/ImageMagick/ImageMagick/issues/964
• https://usn.ubuntu.com/3681-1/
• https://github.com/ImageMagick/ImageMagick/issues/964
• https://usn.ubuntu.com/3681-1/

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