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CVE-2021-27791

5.4 · MEDIUM

The function that is used to parse the Authentication header in Brocade Fabric OS Web application service before Brocade Fabric OS v9.0.1a and v8.2.3a fails to properly process a malformed authenti…

Published Aug 12, 2021CWE-125EPSS 0.60%

Overview

CVE-2021-27791 is a medium-severity vulnerability. It was published on August 12, 2021 and has a CVSS 3.1 base score of 5.4 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.4, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

The function that is used to parse the Authentication header in Brocade Fabric OS Web application service before Brocade Fabric OS v9.0.1a and v8.2.3a fails to properly process a malformed authentication header from the client, resulting in reading memory addresses outside the intended range. An unauthenticated attacker could discover a request, which could bypass the authentication process.

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

Refsecurity.netapp.com/advisory/ntap-20210819-0002/Refwww.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2021-1491Refsecurity.netapp.com/advisory/ntap-20210819-0002/Refwww.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2021-1491

How CyberStrike helps

Frequently asked questions

What is CVE-2021-27791?

CVE-2021-27791 is a medium-severity vulnerability. It was published on August 12, 2021 and has a CVSS 3.1 base score of 5.4 (MEDIUM).

How severe is CVE-2021-27791?

This vulnerability has a CVSS 3.1 base score of 5.4, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-27791?

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-2021-27791?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-27791 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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