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CVE-2020-27771

3.3 · LOW

In RestoreMSCWarning() of /coders/pdf.c there are several areas where calls to GetPixelIndex() could result in values outside the range of representable for the unsigned char type.

Published Dec 4, 2020CWE-190EPSS 1.18%

Overview

CVE-2020-27771 is a low-severity vulnerability. It was published on December 4, 2020 and has a CVSS 3.1 base score of 3.3 (LOW).

This vulnerability has a CVSS 3.1 base score of 3.3, rated LOW. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

In RestoreMSCWarning() of /coders/pdf.c there are several areas where calls to GetPixelIndex() could result in values outside the range of representable for the unsigned char type. The patch casts the return value of GetPixelIndex() to ssize_t type to avoid this bug. This undefined behavior could be triggered when ImageMagick processes a crafted pdf file. Red Hat Product Security marked this as Low severity because although it could potentially lead to an impact to application availability, no specific impact was demonstrated in this case. This flaw affects ImageMagick versions prior to 7.0.9-0.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refbugzilla.redhat.com/show_bug.cgi?id=1898290Reflists.debian.org/debian-lts-announce/2021/03/msg00030.htmlReflists.debian.org/debian-lts-announce/2023/03/msg00008.htmlRefbugzilla.redhat.com/show_bug.cgi?id=1898290Reflists.debian.org/debian-lts-announce/2021/03/msg00030.htmlReflists.debian.org/debian-lts-announce/2023/03/msg00008.html

How CyberStrike helps

Frequently asked questions

What is CVE-2020-27771?

CVE-2020-27771 is a low-severity vulnerability. It was published on December 4, 2020 and has a CVSS 3.1 base score of 3.3 (LOW).

How severe is CVE-2020-27771?

This vulnerability has a CVSS 3.1 base score of 3.3, rated LOW. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2020-27771?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2020-27771?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-27771 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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