CVE-2020-27773

Severity: low (CVSS 3.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2020-12-04 · updated 2026-06-17
Weakness: CWE-369

Description

A flaw was found in ImageMagick in MagickCore/gem-private.h. An attacker who submits a crafted file that is processed by ImageMagick could trigger undefined behavior in the form of values outside the range of type `unsigned char` or division by zero. This would most likely lead to an impact to application availability, but could potentially cause other problems related to undefined behavior. This flaw affects ImageMagick versions prior to 7.0.9-0.

Affected products

Debian Linux: 9.0
ImageMagick: before 6.9.10-69; from 7.0.0-0 before 7.0.9 — fixed in 6.9.10-69, 7.0.9
Red Hat Enterprise Linux: 5.0, 6.0, 7.0

How to fix

Upgrade to a fixed version: ImageMagick 6.9.10-69, 7.0.9. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2020-27773 or the next vulnerability affects your stack