CVE-2018-6434 Auth bypass in Brocade Fabric OS

What is CVE-2018-6434?

CVE-2018-6434 is a high-severity authentication bypass vulnerability in Broadcom Fabric Operating System, published on 8 Nov 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in the web management interface of Brocade Fabric OS versions before 8.2.1, 8.1.2f, 8.0.2f, 7.4.2d could allow attackers to intercept or manipulate a user's session ID.

Weakness: CWE-384

Which versions are affected by CVE-2018-6434?

It affects 1 product.

Products include Broadcom Fabric Operating System.

How do I fix CVE-2018-6434?

No fix has been published for CVE-2018-6434 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2018-6434 being exploited?

There is no known exploitation of CVE-2018-6434 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-gr9m-hh86-87vj.