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CVE-2021-1405

7.5 · HIGH

A vulnerability in the email parsing module in Clam AntiVirus (ClamAV) Software version 0.103.1 and all prior versions could allow an unauthenticated, remote attacker to cause a denial of service c…

Published Apr 8, 2021CWE-120EPSS 3.03%

Overview

CVE-2021-1405 is a high-severity vulnerability. It was published on April 8, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

A vulnerability in the email parsing module in Clam AntiVirus (ClamAV) Software version 0.103.1 and all prior versions could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device. The vulnerability is due to improper variable initialization that may result in an NULL pointer read. An attacker could exploit this vulnerability by sending a crafted email to an affected device. An exploit could allow the attacker to cause the ClamAV scanning process crash, resulting in a denial of service condition.

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

Refblog.clamav.net/2021/04/clamav-01032-security-patch-release.htmlReflists.debian.org/debian-lts-announce/2021/04/msg00012.htmlRefsecurity.gentoo.org/glsa/202104-07Refblog.clamav.net/2021/04/clamav-01032-security-patch-release.htmlReflists.debian.org/debian-lts-announce/2021/04/msg00012.htmlRefsecurity.gentoo.org/glsa/202104-07

How CyberStrike helps

Frequently asked questions

What is CVE-2021-1405?

CVE-2021-1405 is a high-severity vulnerability. It was published on April 8, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2021-1405?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-1405?

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-2021-1405?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-1405 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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