CVE & CISA-KEV Catalog

CVE-2021-20309

HIGHEPSS 82th pctl
7.5
CVSS v3
NVD

Description

A flaw was found in ImageMagick in versions before 7.0.11 and before 6.9.12, where a division by zero in WaveImage() of MagickCore/visual-effects.c may trigger undefined behavior via a crafted image file submitted to an application using ImageMagick. The highest threat from this vulnerability is to system availability.

CWE-369

How to fix

Remediation Available
imagemagickDebian
Fixed in:8:6.9.11.60+dfsg-1.3+deb11u2CVE-2021-20309
Fixed in:8:6.9.11.60+dfsg-1.5CVE-2021-20309
Fixed in:8:6.9.11.60+dfsg-1.5CVE-2021-20309
Fixed in:8:6.9.11.60+dfsg-1.5CVE-2021-20309
imagemagickUbuntu
Fixed in:8:6.7.7.10-6ubuntu3.13+esm3USN-5736-1
Fixed in:8:6.7.7.10-6ubuntu3.13+esm1USN-5158-1
Fixed in:8:6.8.9.9-7ubuntu5.16+esm5USN-5736-1
Fixed in:8:6.8.9.9-7ubuntu5.16+esm8USN-6200-1
Fixed in:8:6.8.9.9-7ubuntu5.16+esm1USN-5158-1
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.15+esm1USN-6200-1
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.14USN-5736-1
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.12USN-5158-1
imagemagick-6-commonUbuntu
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.14USN-5736-1
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.15+esm1USN-6200-1
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.9USN-6200-1
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.4+esm1USN-5736-2
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.04.3+esm2USN-6200-1
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.04.1+esm1USN-5736-2
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.10.5USN-6200-1
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.10.1USN-5736-1
imagemagick-6.q16Ubuntu
Fixed in:8:6.8.9.9-7ubuntu5.16+esm8USN-6200-1
Fixed in:8:6.8.9.9-7ubuntu5.16+esm5USN-5736-1
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.15+esm1USN-6200-1
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.14USN-5736-1
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.9USN-6200-1
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.4+esm1USN-5736-2
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.04.3+esm2USN-6200-1
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.04.1+esm1USN-5736-2
imagemagick-6.q16hdriUbuntu
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.14USN-5736-1
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.15+esm1USN-6200-1
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.4+esm1USN-5736-2
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.9USN-6200-1
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.04.3+esm2USN-6200-1
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.04.1+esm1USN-5736-2
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.10.1USN-5736-1
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.10.5USN-6200-1
imagemagick-commonUbuntu
Fixed in:8:6.7.7.10-6ubuntu3.13+esm3USN-5736-1
Fixed in:8:6.8.9.9-7ubuntu5.16+esm8USN-6200-1
Fixed in:8:6.8.9.9-7ubuntu5.16+esm5USN-5736-1
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.14USN-5736-1
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.15+esm1USN-6200-1
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.4+esm1USN-5736-2
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.9USN-6200-1
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.04.1+esm1USN-5736-2
libimage-magick-perlUbuntu
Fixed in:8:6.8.9.9-7ubuntu5.16+esm5USN-5736-1
Fixed in:8:6.8.9.9-7ubuntu5.16+esm8USN-6200-1
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.14USN-5736-1
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.15+esm1USN-6200-1
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.9USN-6200-1
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.4+esm1USN-5736-2
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.04.3+esm2USN-6200-1
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.04.1+esm1USN-5736-2
libimage-magick-q16-perlUbuntu
Fixed in:8:6.8.9.9-7ubuntu5.16+esm5USN-5736-1
Fixed in:8:6.8.9.9-7ubuntu5.16+esm8USN-6200-1
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.14USN-5736-1
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.15+esm1USN-6200-1
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.9USN-6200-1
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.4+esm1USN-5736-2
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.04.3+esm2USN-6200-1
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.04.1+esm1USN-5736-2
libmagick++-6.q16-5v5Ubuntu
Fixed in:8:6.8.9.9-7ubuntu5.16+esm5USN-5736-1
Fixed in:8:6.8.9.9-7ubuntu5.16+esm1USN-5158-1
Fixed in:8:6.8.9.9-7ubuntu5.16+esm8USN-6200-1
libmagick++-6.q16-7Ubuntu
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.12USN-5158-1
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.15+esm1USN-6200-1
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.14USN-5736-1
libmagick++-6.q16-8Ubuntu
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.9USN-6200-1
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.4+esm1USN-5736-2
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.04.1+esm1USN-5736-2
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.04.3+esm2USN-6200-1
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.10.1USN-5736-1
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.10.5USN-6200-1
Fixed in:8:6.9.11.60+dfsg-1.6ubuntu0.23.04.1USN-6200-1
libmagick++-6.q16-devUbuntu
Fixed in:8:6.8.9.9-7ubuntu5.16+esm8USN-6200-1
Fixed in:8:6.8.9.9-7ubuntu5.16+esm5USN-5736-1
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.15+esm1USN-6200-1
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.14USN-5736-1
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.9USN-6200-1
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.4+esm1USN-5736-2
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.04.3+esm2USN-6200-1
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.04.1+esm1USN-5736-2
libmagick++-6.q16hdri-7Ubuntu
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.15+esm1USN-6200-1
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.14USN-5736-1
libmagick++-6.q16hdri-8Ubuntu
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.9USN-6200-1
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.4+esm1USN-5736-2
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.04.1+esm1USN-5736-2
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.04.3+esm2USN-6200-1
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.10.5USN-6200-1
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.10.1USN-5736-1
Fixed in:8:6.9.11.60+dfsg-1.6ubuntu0.23.04.1USN-6200-1
libmagick++-6.q16hdri-devUbuntu
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.15+esm1USN-6200-1
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.9USN-6200-1
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.04.3+esm2USN-6200-1
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.10.5USN-6200-1
Fixed in:8:6.9.11.60+dfsg-1.6ubuntu0.23.04.1USN-6200-1
libmagick++-devUbuntu
Fixed in:8:6.7.7.10-6ubuntu3.13+esm3USN-5736-1
Fixed in:8:6.8.9.9-7ubuntu5.16+esm5USN-5736-1
Fixed in:8:6.8.9.9-7ubuntu5.16+esm8USN-6200-1
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.14USN-5736-1
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.15+esm1USN-6200-1
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.4+esm1USN-5736-2
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.9USN-6200-1
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.04.1+esm1USN-5736-2
libmagick++5Ubuntu
Fixed in:8:6.7.7.10-6ubuntu3.13+esm3USN-5736-1
Fixed in:8:6.7.7.10-6ubuntu3.13+esm1USN-5158-1
libmagickcore-6-arch-configUbuntu
Fixed in:8:6.8.9.9-7ubuntu5.16+esm5USN-5736-1
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.14USN-5736-1
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.4+esm1USN-5736-2
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.04.1+esm1USN-5736-2
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.10.1USN-5736-1
libmagickcore-6-headersUbuntu
Fixed in:8:6.8.9.9-7ubuntu5.16+esm5USN-5736-1
Fixed in:8:6.8.9.9-7ubuntu5.16+esm8USN-6200-1
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.15+esm1USN-6200-1
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.14USN-5736-1
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.4+esm1USN-5736-2
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.9USN-6200-1
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.04.3+esm2USN-6200-1
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.04.1+esm1USN-5736-2
libmagickcore-6.q16-2Ubuntu
Fixed in:8:6.8.9.9-7ubuntu5.16+esm8USN-6200-1
Fixed in:8:6.8.9.9-7ubuntu5.16+esm5USN-5736-1
libmagickcore-6.q16-2-extraUbuntu
Fixed in:8:6.8.9.9-7ubuntu5.16+esm5USN-5736-1
libmagickcore-6.q16-3Ubuntu
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.15+esm1USN-6200-1
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.14USN-5736-1
libmagickcore-6.q16-3-extraUbuntu
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.14USN-5736-1
libmagickcore-6.q16-6Ubuntu
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.9USN-6200-1
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.4+esm1USN-5736-2
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.04.1+esm1USN-5736-2
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.04.3+esm2USN-6200-1
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.10.1USN-5736-1
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.10.5USN-6200-1
Fixed in:8:6.9.11.60+dfsg-1.6ubuntu0.23.04.1USN-6200-1
libmagickcore-6.q16-6-extraUbuntu
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.4+esm1USN-5736-2
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.04.1+esm1USN-5736-2
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.10.1USN-5736-1
libmagickcore-6.q16-devUbuntu
Fixed in:8:6.8.9.9-7ubuntu5.16+esm8USN-6200-1
Fixed in:8:6.8.9.9-7ubuntu5.16+esm5USN-5736-1
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.14USN-5736-1
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.15+esm1USN-6200-1
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.4+esm1USN-5736-2
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.9USN-6200-1
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.04.3+esm2USN-6200-1
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.04.1+esm1USN-5736-2
libmagickcore-6.q16hdri-3Ubuntu
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.14USN-5736-1
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.15+esm1USN-6200-1
libmagickcore-6.q16hdri-6Ubuntu
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.9USN-6200-1
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.4+esm1USN-5736-2
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.04.3+esm2USN-6200-1
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.04.1+esm1USN-5736-2
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.10.5USN-6200-1
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.10.1USN-5736-1
Fixed in:8:6.9.11.60+dfsg-1.6ubuntu0.23.04.1USN-6200-1
libmagickcore-devUbuntu
Fixed in:8:6.7.7.10-6ubuntu3.13+esm3USN-5736-1
Fixed in:8:6.8.9.9-7ubuntu5.16+esm5USN-5736-1
Fixed in:8:6.8.9.9-7ubuntu5.16+esm8USN-6200-1
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.15+esm1USN-6200-1
Fixed in:8:6.9.7.4+dfsg-16ubuntu6.14USN-5736-1
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.9USN-6200-1
Fixed in:8:6.9.10.23+dfsg-2.1ubuntu11.4+esm1USN-5736-2
Fixed in:8:6.9.11.60+dfsg-1.3ubuntu0.22.04.3+esm2USN-6200-1
libmagickcore5Ubuntu
Fixed in:8:6.7.7.10-6ubuntu3.13+esm3USN-5736-1

This vulnerability affects an unusually large number of packages. The highest-confidence fixes are shown above; the full list is longer. Check the referenced advisories for complete coverage.

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityNone
IntegrityNone
AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

2.31%probability of exploitation in 30 days
82ndpercentile

Elevated risk: more likely to be exploited than 82% of all known CVEs.

References

Third-Party Advisory1
Other references1

Related Vulnerabilities

Other CWE-369 vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2012-0207High7.520%-Fix
CVE-2017-8537Medium5.517%--
CVE-2017-8536Medium5.517%--
CVE-2017-8535Medium5.517%--
CVE-2007-2237Medium5.515%--
CVE-2025-0317High7.514%--

Common questions

How do I fix CVE-2021-20309?

Published advisories record a fix for 41 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2021-20309 being actively exploited?

Not that we know of. CVE-2021-20309 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 2.3% is the estimated probability that it will be exploited in the next 30 days. That is higher than 82% of all scored CVEs.

How severe is CVE-2021-20309?

CVE-2021-20309 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2021-20309 affect?

Published advisories record a fix for imagemagick (Debian), imagemagick (Ubuntu), imagemagick-6-common (Ubuntu), imagemagick-6.q16 (Ubuntu), and 37 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.