CVE-2021-27790 Memory corruption in Brocade Fabric OS

What is CVE-2021-27790?

CVE-2021-27790 is a high-severity memory corruption 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 command ipfilter in Brocade Fabric OS before Brocade Fabric OS v.9.0.1a, v8.2.3, and v8.2.0_CBN4, and v7.4.2h uses unsafe string function to process user input. Authenticated attackers can abuse this vulnerability to exploit stack-based buffer overflows, allowing execution of arbitrary code as the root user account.

Weakness: CWE-787

Which versions are affected by CVE-2021-27790?

It affects 1 product.

Products include Broadcom Fabric Operating System.

How do I fix CVE-2021-27790?

No fix has been published for CVE-2021-27790 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2021-27790 being exploited?

There is no known exploitation of CVE-2021-27790 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-qp38-g7j8-6pgx.