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CVE-2020-4042

6.8 · MEDIUM

Bareos before version 19.2.8 and earlier allows a malicious client to communicate with the director without knowledge of the shared secret if the director allows client initiated connection and con…

Published Jul 10, 2020CWE-294EPSS 0.97%

Overview

CVE-2020-4042 is a medium-severity vulnerability. It was published on July 10, 2020 and has a CVSS 3.1 base score of 6.8 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Bareos before version 19.2.8 and earlier allows a malicious client to communicate with the director without knowledge of the shared secret if the director allows client initiated connection and connects to the client itself. The malicious client can replay the Bareos director's cram-md5 challenge to the director itself leading to the director responding to the replayed challenge. The response obtained is then a valid reply to the directors original challenge. This is fixed in version 19.2.8.

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

Refbugs.bareos.org/view.php?id=1250GitHubgithub.com/bareos/bareos/security/advisories/GHSA-vqpj-2vhj-h752Refbugs.bareos.org/view.php?id=1250GitHubgithub.com/bareos/bareos/security/advisories/GHSA-vqpj-2vhj-h752

How CyberStrike helps

Frequently asked questions

What is CVE-2020-4042?

CVE-2020-4042 is a medium-severity vulnerability. It was published on July 10, 2020 and has a CVSS 3.1 base score of 6.8 (MEDIUM).

How severe is CVE-2020-4042?

This vulnerability has a CVSS 3.1 base score of 6.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2020-4042?

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-2020-4042?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-4042 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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