Is CVE-2021-20311 in the CISA KEV catalog?

No. CVE-2021-20311 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-20311?

CVE-2021-20311 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-20311?

CVE-2021-20311 has an EPSS score of 1.27% (66th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-20311?

Upgrade imagemagick on debian 12 to 8:6.9.11.60+dfsg-1.5 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2021-20311

HIGH

7.5

CVSS v3

NVD

Description

A flaw was found in ImageMagick in versions before 7.0.11, where a division by zero in sRGBTransformImage() in the MagickCore/colorspace.c may trigger undefined behavior via a crafted image file that is submitted by an attacker processed by 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-1.5CVE-2021-20311

ImageMagick Q16Windows application

Affected:7.0.11-0Fixed in:7.0.11-0ImageMagick Studio LLC

ImageMagick Q16-HDRIWindows application

Affected:7.0.11-0Fixed in:7.0.11-0ImageMagick Studio LLC

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

1.27%probability of exploitation in 30 days

66thpercentile

Moderate risk: more likely to be exploited than 66% of all known CVEs.

References

Patch1

bugzilla.redhat.com

Related Vulnerabilities

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

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2012-0207	High	7.5	20%	-	Fix
CVE-2017-8537	Medium	5.5	17%	-	-
CVE-2017-8536	Medium	5.5	17%	-	-
CVE-2017-8535	Medium	5.5	17%	-	-
CVE-2007-2237	Medium	5.5	15%	-	-
CVE-2025-0317	High	7.5	13%	-	-

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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.