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CVE-2021-36369

7.5 · HIGH

An issue was discovered in Dropbear through 2020.81.

Published Oct 12, 2022CWE-287EPSS 1.86%

Overview

CVE-2021-36369 is a high-severity vulnerability. It was published on October 12, 2022 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 Dropbear through 2020.81. Due to a non-RFC-compliant check of the available authentication methods in the client-side SSH code, it is possible for an SSH server to change the login process in its favor. This attack can bypass additional security measures such as FIDO2 tokens or SSH-Askpass. Thus, it allows an attacker to abuse a forwarded agent for logging on to another server unnoticed.

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/mkj/dropbear/pull/128GitHubgithub.com/mkj/dropbear/releasesGitHubgithub.com/mkj/dropbear/releases/tag/DROPBEAR_2022.82Reflists.debian.org/debian-lts-announce/2022/11/msg00015.htmlGitHubgithub.com/mkj/dropbear/pull/128GitHubgithub.com/mkj/dropbear/releasesGitHubgithub.com/mkj/dropbear/releases/tag/DROPBEAR_2022.82Reflists.debian.org/debian-lts-announce/2022/11/msg00015.html

How CyberStrike helps

Frequently asked questions

What is CVE-2021-36369?

CVE-2021-36369 is a high-severity vulnerability. It was published on October 12, 2022 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2021-36369?

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-2021-36369?

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-2021-36369?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-36369 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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