CVE-2018-6442
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 · uneditedA vulnerability in the Brocade Webtools firmware update section of Brocade Fabric OS before 8.2.1, 8.1.2f, 8.0.2f, 7.4.2d could allow remote authenticated attackers to execute arbitrary commands.
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 · high confidenceCommand injection vulnerability in Brocade Webtools firmware update component allows authenticated remote attackers to execute arbitrary operating system commands due to insufficient input validation in the firmware upgrade functionality.
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>= 7.4.2, < 7.4.2d>= 8.0.2, < 8.0.2f>= 8.1.2, < 8.1.2f>= 8.2.0, < 8.2.1CVSS 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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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 checksWork through these to decide whether this CVE applies to you.
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Identify the Fabric OS productCheck the system hostname, system identification, or use the 'version' CLI command to confirm the device runs Brocade or Broadcom Fabric OS.Affected if The system is not running Brocade/Broadcom Fabric OS.
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Determine the installed Fabric OS versionRun the Fabric OS 'version' command or check the firmware version through the CLI. Compare the version number to the affected ranges: 7.4.2 through 7.4.2d, 8.0.2 through 8.0.2f, 8.1.2 through 8.1.2f, or 8.2.0 through 8.2.1.Affected if The installed version falls within any of the affected version ranges.
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Verify Webtools is enabledCheck if the Webtools web interface is active on the device. This is typically accessible via HTTP/HTTPS on standard management ports. Use 'webtech' or similar CLI command to list enabled web services.Affected if Webtools is enabled and accessible.
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Check Webtools authentication configurationReview the Webtools access controls and authentication settings. Confirm whether remote authentication is enforced for Webtools access.Affected if Webtools allows remote authenticated access without additional network restrictions.
The environment is affected if the device runs Broadcom Fabric OS with a version in the vulnerable ranges AND Webtools is enabled with remote authentication accessible.
Generated from the published advisory. Verify against your own configuration.
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 data7.4.2d8.0.2f8.1.2f
Upgrade Brocade Fabric OS to version 8.2.1 or later (or 8.1.2f, 8.0.2f, 7.4.2d as applicable per branch). If immediate upgrade is not possible, restrict Webtools access to trusted management networks and enforce strong authentication.
- Consultation8.0 h
- Implementation12.0 h
- Testing12.0 h
- Review / QA6.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-6442 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2018-6442 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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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.
- 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
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