What is CVE-2021-27790?

CVE-2021-27790 is a vulnerability in Brocade Fabric OS that allows authenticated attackers to exploit stack-based buffer overflows, leading to the execution of arbitrary code.

What is the severity of CVE-2021-27790?

The severity of CVE-2021-27790 is rated as high with a severity value of 7.8.

How can authenticated attackers exploit CVE-2021-27790?

Authenticated attackers can abuse CVE-2021-27790 by using the unsafe string function in the 'ipfilter' command in Brocade Fabric OS to process user input, leading to stack-based buffer overflows.

Which versions of Brocade Fabric OS are affected by CVE-2021-27790?

Versions before Brocade Fabric OS v.9.0.1a, v8.2.3, v8.2.0_CBN4, and v7.4.2h are affected by CVE-2021-27790.

How can I fix CVE-2021-27790?

To fix CVE-2021-27790, it is recommended to update Brocade Fabric OS to version 9.0.1a, v8.2.3, v8.2.0_CBN4, or v7.4.2h.

Vulnerability/
CVE-2021-27790

high

7.8

CWE

787 119

12/8/2021

3/8/2024

CVE-2021-27790: Buffer Overflow

First published: Thu Aug 12 2021(Updated: )

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.

Credit: sirt@brocade.com

Affected Software	Affected Version	How to fix
Broadcom Fabric Operating System	<7.4.2h
Broadcom Fabric Operating System	>=8.0.0<8.2.0_cbn4
Broadcom Fabric Operating System	>=8.2.1<8.2.3
Broadcom Fabric Operating System	>=9.0.0<9.0.1a

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Frequently Asked Questions

What is CVE-2021-27790?
CVE-2021-27790 is a vulnerability in Brocade Fabric OS that allows authenticated attackers to exploit stack-based buffer overflows, leading to the execution of arbitrary code.
What is the severity of CVE-2021-27790?
The severity of CVE-2021-27790 is rated as high with a severity value of 7.8.
How can authenticated attackers exploit CVE-2021-27790?
Authenticated attackers can abuse CVE-2021-27790 by using the unsafe string function in the 'ipfilter' command in Brocade Fabric OS to process user input, leading to stack-based buffer overflows.
Which versions of Brocade Fabric OS are affected by CVE-2021-27790?
Versions before Brocade Fabric OS v.9.0.1a, v8.2.3, v8.2.0_CBN4, and v7.4.2h are affected by CVE-2021-27790.
How can I fix CVE-2021-27790?
To fix CVE-2021-27790, it is recommended to update Brocade Fabric OS to version 9.0.1a, v8.2.3, v8.2.0_CBN4, or v7.4.2h.

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collector/mitre-cve
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vendor/broadcom
canonical/broadcom fabric operating system
version/broadcom fabric operating system/8.0.0
version/broadcom fabric operating system/8.2.1
version/broadcom fabric operating system/9.0.0

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