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CVE-2021-3477

5.5 · MEDIUM

There's a flaw in OpenEXR's deep tile sample size calculations in versions before 3.0.0-beta.

Published Mar 31, 2021CWE-190EPSS 0.96%

Overview

CVE-2021-3477 is a medium-severity vulnerability. It was published on March 31, 2021 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

There's a flaw in OpenEXR's deep tile sample size calculations in versions before 3.0.0-beta. An attacker who is able to submit a crafted file to be processed by OpenEXR could trigger an integer overflow, subsequently leading to an out-of-bounds read. The greatest risk of this flaw is to application availability.

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

Refbugs.chromium.org/p/oss-fuzz/issues/detail?id=26956Refbugzilla.redhat.com/show_bug.cgi?id=1939159Reflists.debian.org/debian-lts-announce/2021/07/msg00001.htmlReflists.debian.org/debian-lts-announce/2022/12/msg00022.htmlRefsecurity.gentoo.org/glsa/202107-27Refbugs.chromium.org/p/oss-fuzz/issues/detail?id=26956Refbugzilla.redhat.com/show_bug.cgi?id=1939159Reflists.debian.org/debian-lts-announce/2021/07/msg00001.htmlReflists.debian.org/debian-lts-announce/2022/12/msg00022.htmlRefsecurity.gentoo.org/glsa/202107-27

How CyberStrike helps

Frequently asked questions

What is CVE-2021-3477?

CVE-2021-3477 is a medium-severity vulnerability. It was published on March 31, 2021 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2021-3477?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. 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-2021-3477?

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-2021-3477?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-3477 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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