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CVE-2023-41378

7.5 · HIGH

In certain conditions for Calico Typha (v3.26.2, v3.25.1 and below), and Calico Enterprise Typha (v3.17.1, v3.16.3, v3.15.3 and below), a client TLS handshake can block the Calico Typha server inde…

Published Nov 6, 2023CWE-400EPSS 0.72%

Overview

CVE-2023-41378 is a high-severity vulnerability. It was published on November 6, 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

In certain conditions for Calico Typha (v3.26.2, v3.25.1 and below), and Calico Enterprise Typha (v3.17.1, v3.16.3, v3.15.3 and below), a client TLS handshake can block the Calico Typha server indefinitely, resulting in denial of service. The TLS Handshake() call is performed inside the main server handle for loop without any timeout allowing an unclean TLS handshake to block the main loop indefinitely while other connections will be idle waiting for that handshake to finish.

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

GitHubgithub.com/projectcalico/calico/pull/7908GitHubgithub.com/projectcalico/calico/pull/7993Refwww.tigera.io/security-bulletins-tta-2023-001/GitHubgithub.com/projectcalico/calico/pull/7908GitHubgithub.com/projectcalico/calico/pull/7993Refwww.tigera.io/security-bulletins-tta-2023-001/

How CyberStrike helps

Frequently asked questions

What is CVE-2023-41378?

CVE-2023-41378 is a high-severity vulnerability. It was published on November 6, 2023 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2023-41378?

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-2023-41378?

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-2023-41378?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-41378 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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