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CVE-2023-4540

7.5 · HIGH

Improper Handling of Exceptional Conditions vulnerability in Daurnimator lua-http library allows Excessive Allocation and a denial of service (DoS) attack to be executed by sending a properly craft…

Published Sep 5, 2023CWE-755EPSS 1.09%

Overview

CVE-2023-4540 is a high-severity vulnerability. It was published on September 5, 2023 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

Improper Handling of Exceptional Conditions vulnerability in Daurnimator lua-http library allows Excessive Allocation and a denial of service (DoS) attack to be executed by sending a properly crafted request to the server.

Such a request causes the program to enter an infinite loop.

This issue affects lua-http: all versions before commit ddab283.

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

Refcert.pl/en/posts/2023/09/CVE-2023-4540/Refcert.pl/posts/2023/09/CVE-2023-4540/GitHubgithub.com/daurnimator/lua-http/commit/ddab2835c583d45dec62680ca8d3cbde55e0bae6Refcert.pl/posts/2023/09/CVE-2023-4540/GitHubgithub.com/daurnimator/lua-http/commit/ddab2835c583d45dec62680ca8d3cbde55e0bae6Refhttps://cert.pl/en/posts/2023/09/CVE-2023-4540/

How CyberStrike helps

Frequently asked questions

What is CVE-2023-4540?

CVE-2023-4540 is a high-severity vulnerability. It was published on September 5, 2023 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2023-4540?

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-2023-4540?

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-2023-4540?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-4540 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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