CVE-2021-27792 Denial of service in Brocade Fabric OS

What is CVE-2021-27792?

CVE-2021-27792 is a high-severity denial of service vulnerability in Broadcom Fabric Operating System, published on 12 Aug 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The request handling functions in web management interface of Brocade Fabric OS versions before v9.0.1a, v8.2.3a, and v7.4.2h do not properly handle malformed user input, resulting in a service crash. An authenticated attacker could use this weakness to cause the FOS HTTP application handler to crash, requiring a reboot.

Which versions are affected by CVE-2021-27792?

It affects 1 product.

Products include Broadcom Fabric Operating System.

How do I fix CVE-2021-27792?

No fix has been published for CVE-2021-27792 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2021-27792 being exploited?

There is no known exploitation of CVE-2021-27792 in the wild and no public exploit code.

Other vulnerabilities in Broadcom Fabric Operating System

• CVE-2025-1976 Broadcom Brocade Fabric OS Code Injection Exploited High 8.6
• CVE-2021-22555 Linux Kernel Heap Out-of-Bounds Write Exploited High 8.3
• CVE-2022-33186 Command injection in Brocade Fabric OS Critical 9.8
• CVE-2021-27797 Hardcoded credentials in Brocade Fabric OS Critical 9.8
• CVE-2020-15371 Code injection in Brocade Fabric OS Critical 9.8

All Broadcom Fabric Operating System vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-v38r-g8mp-wm8f.