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Fabric Operating SystemOperating system · Broadcom

CVE-2018-6449

MEDIUM · 6.1 CVSS v3.1 Published 2020-09-25
Fix available
A fix is available. Upgrade to 9.0.0 or later.
See remediation →
68/100
Remediation priority · Elevated
Remotely reachable No privileges

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Host Header Injection vulnerability in the http management interface in Brocade Fabric OS versions before v9.0.0 could allow a remote attacker to exploit this vulnerability by injecting arbitrary HTTP headers

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

Host Header Injection vulnerability in the HTTP management interface of Brocade Fabric OS versions before v9.0.0 allows remote attackers to inject arbitrary HTTP headers by manipulating the Host header in requests to the management interface.

MitigationUpgrade Brocade Fabric OS to v9.0.0 or later. Additionally, implement Host header validation at the web server or load balancer level to reject requests with unexpected Host values.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Fabric Operating SystemOperating system
Affected:< 9.0.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify the Fabric OS version
    Use the CLI command 'version' or access the web management interface to determine the installed Broadcom/Brocade Fabric OS version number
    Affected if Version is lower than 9.0.0
  2. Verify HTTP management interface is enabled
    Check the management interface configuration using CLI commands such as 'show management' or through the web interface settings
    Affected if HTTP management interface is enabled and the version is below 9.0.0
  3. Confirm management interface network accessibility
    Review access control lists, firewall rules, or network segmentation to determine if the HTTP management interface is reachable from network segments other than trusted management networks
    Affected if The management interface is exposed to untrusted networks and version is below 9.0.0

Environment is affected if running any version of Broadcom Fabric OS prior to v9.0.0 with the HTTP management interface enabled and accessible.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Upgrade available Upgrade to 9.0.0 or later
Fixed in 9.0.0
Interim mitigation

Upgrade Brocade Fabric OS to v9.0.0 or later. Additionally, implement Host header validation at the web server or load balancer level to reject requests with unexpected Host values.

Fix this in Fabric Operating System Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA4.0 h
22.0 hours of engineering $3,860
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,176.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2018-6449 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data