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CVE-2021-44273

7.4 · HIGH

e2guardian v5.4.x <= v5.4.3r is affected by missing SSL certificate validation in the SSL MITM engine.

Published Dec 23, 2021CWE-295EPSS 1.00%

Overview

CVE-2021-44273 is a high-severity vulnerability. It was published on December 23, 2021 and has a CVSS 3.1 base score of 7.4 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.4, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

e2guardian v5.4.x <= v5.4.3r is affected by missing SSL certificate validation in the SSL MITM engine. In standalone mode (i.e., acting as a proxy or a transparent proxy), with SSL MITM enabled, e2guardian, if built with OpenSSL v1.1.x, did not validate hostnames in certificates of the web servers that it connected to, and thus was itself vulnerable to MITM attacks.

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

Refwww.openwall.com/lists/oss-security/2021/12/23/2GitHubgithub.com/e2guardian/e2guardian/commit/eae46a7e2a57103aadca903c4a24cca94dc502a2GitHubgithub.com/e2guardian/e2guardian/issues/707Reflists.debian.org/debian-lts-announce/2023/09/msg00010.htmlRefwww.openwall.com/lists/oss-security/2021/12/23/2GitHubgithub.com/e2guardian/e2guardian/commit/eae46a7e2a57103aadca903c4a24cca94dc502a2GitHubgithub.com/e2guardian/e2guardian/issues/707Reflists.debian.org/debian-lts-announce/2023/09/msg00010.html

How CyberStrike helps

Frequently asked questions

What is CVE-2021-44273?

CVE-2021-44273 is a high-severity vulnerability. It was published on December 23, 2021 and has a CVSS 3.1 base score of 7.4 (HIGH).

How severe is CVE-2021-44273?

This vulnerability has a CVSS 3.1 base score of 7.4, 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-2021-44273?

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-2021-44273?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-44273 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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