CVE-2021-27796 Path traversal in Brocade Fabric OS

What is CVE-2021-27796?

CVE-2021-27796 is a medium-severity path traversal vulnerability in Broadcom Fabric Operating System, published on 21 Feb 2022. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability in Brocade Fabric OS versions before Brocade Fabric OS v8.0.1b, v7.4.1d could allow an authenticated attacker within the restricted shell environment (rbash) as either the “user” or “factory” account, to read the contents of any file on the filesystem utilizing one of a few available binaries.

Which versions are affected by CVE-2021-27796?

It affects 1 product.

Products include Broadcom Fabric Operating System.

How do I fix CVE-2021-27796?

No fix has been published for CVE-2021-27796 yet. Limit exposure of the affected software until one is available.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2021-27796 being exploited?

There is no known exploitation of CVE-2021-27796 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-gh9w-mq5f-6242.