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CVE-2020-24388

7.5 · HIGH

An issue was discovered in the _send_secure_msg() function of yubihsm-shell through 2.0.2.

Published Oct 19, 2020CWE-20EPSS 1.75%

Overview

CVE-2020-24388 is a high-severity vulnerability. It was published on October 19, 2020 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

An issue was discovered in the _send_secure_msg() function of yubihsm-shell through 2.0.2. The function does not validate the embedded length field of a message received from the device. This could lead to an oversized memcpy() call that will crash the running process. This could be used by an attacker to cause a denial of service.

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.inhq.net/posts/yubico-libyubihsm-vuln/Refdevelopers.yubico.com/yubihsm-shell/GitHubgithub.com/Yubico/yubihsm-shellReflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y77KQJW76M3PFOBFLBT6DLH2NWHYRNZO/Refwww.yubico.com/support/security-advisories/ysa-2020-06/Refblog.inhq.net/posts/yubico-libyubihsm-vuln/Refdevelopers.yubico.com/yubihsm-shell/GitHubgithub.com/Yubico/yubihsm-shellReflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y77KQJW76M3PFOBFLBT6DLH2NWHYRNZO/Refwww.yubico.com/support/security-advisories/ysa-2020-06/

How CyberStrike helps

Frequently asked questions

What is CVE-2020-24388?

CVE-2020-24388 is a high-severity vulnerability. It was published on October 19, 2020 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2020-24388?

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-2020-24388?

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-2020-24388?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-24388 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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