CVE-2023-31430
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 buffer overflow vulnerability in “secpolicydelete” command in Brocade Fabric OS before Brocade Fabric OS v9.1.1c and v9.2.0 could allow an authenticated privileged user to crash the Brocade Fabric OS switch leading to a denial of service.
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 confidenceA buffer overflow vulnerability exists in the secpolicydelete command in Brocade Fabric OS versions prior to 9.1.1c and 9.2.0. An authenticated privileged user can exploit this to overflow a buffer, causing the switch to crash and resulting in denial of service.
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< 9.1.1c= 9.2.0CVSS 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
- Local
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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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Determine Fabric OS versionExecute 'version' or 'firmwareShow' command on the switch CLI to retrieve the installed Fabric OS versionAffected if Version is below 9.1.1c or equals exactly 9.2.0
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Confirm secpolicydelete command availabilityCheck if the secpolicydelete command is present and executable in the current Fabric OS by running 'help secpolicydelete' or attempting to access the security policy management interfaceAffected if The secpolicydelete command is available on the switch
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Verify authentication is enabledReview authentication configuration using 'userconfigshow' or 'aaa --show' to confirm user authentication is activeAffected if User authentication is configured and authenticated users exist on the system
The environment is affected if the installed Fabric OS version is less than 9.1.1c or exactly 9.2.0, and the secpolicydelete command is accessible to authenticated privileged users on the switch.
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.
dbcve · scoped9.1.1c
Upgrade Brocade Fabric OS to version 9.1.1c, 9.2.0, or later to resolve the buffer overflow vulnerability in the secpolicydelete command.
Brocade Fabric OS v9.1.1c (or later 9.1.x) or v9.2.1 (or later 9.2.x)
- 1. Verify current Brocade Fabric OS version using 'version' command or via Fabric Web Tools
- 2. If running version < 9.1.1c, plan upgrade to version 9.1.1c or later in the 9.1.x branch
- 3. If running version 9.2.0, plan upgrade to version 9.2.1 or later in the 9.2.x branch
- 4. Backup current switch configuration before upgrading
- 5. Download the appropriate Fabric OS firmware from Broadcom support portal (support.broadcom.com)
- 6. Upload firmware to the switch using 'firmwareDownload' command
- 7. Verify upgrade completion and new version using 'version' command
- 8. Validate that 'secpolicydelete' command functions normally
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation1.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-31430 — 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-2023-31430 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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- Version or environment caveats, and links to real fixes
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