CVE-2020-27773 Denial of service in ImageMagick

What is CVE-2020-27773?

CVE-2020-27773 is a low-severity denial of service vulnerability in Debian Debian Linux, published on 4 Dec 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official 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.

Weakness: CWE-369

Which versions are affected by CVE-2020-27773?

It affects 3 products.

Products include Debian Debian Linux, Imagemagick Imagemagick, Redhat Enterprise Linux.

How do I fix CVE-2020-27773?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2020-27773 being exploited?

There is no known exploitation of CVE-2020-27773 in the wild and no public exploit code.

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All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2020-27773, GHSA-6797-x9mp-395p, JLSEC-2026-871, UBUNTU-CVE-2020-27773.