CVE-2023-31429
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 · uneditedBrocade Fabric OS before Brocade Fabric OS 9.1.1c, 9.2.0 contains a vulnerability when using various commands such as “chassisdistribute”, “reboot”, “rasman”, errmoduleshow, errfilterset, hassiscfgperrthreshold, supportshowcfgdisable and supportshowcfgenable commands that can cause the content of shell interpreted variables to be printed in the terminal.
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 confidenceBrocade Fabric OS contains an information disclosure vulnerability where multiple privileged commands (chassisdistribute, reboot, rasman, errmoduleshow, errfilterset, hassiscfgperrthreshold, supportshowcfgdisable, supportshowcfgenable) inadvertently print shell interpreted variables to the terminal output, potentially exposing environment variables, paths, or other sensitive system information.
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< 9.1.1cCVSS 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
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/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 checksWork through these to decide whether this CVE applies to you.
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Identify Fabric OS versionRun 'version' or 'switchname' command to display the Fabric OS version installed on the Brocade switchAffected if The displayed version is earlier than 9.1.1c (for example 9.1.0, 9.0.x, 8.x, etc.)
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Verify affected command availabilityConfirm you have administrative/privileged access to the switch CLI and can execute privileged commands such as chassisdistribute, reboot, rasman, errmoduleshow, errfilterset, hassiscfgperrthreshold, supportshowcfgdisable, or supportshowcfgenableAffected if You have privileged access and these commands are available on your system
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Test for shell variable leakage in command outputExecute one of the affected privileged commands (e.g., 'chassisdistribute' or 'rasman') and carefully examine the terminal output for any unexpanded shell variables, environment variable names (like PATH, HOME, USER), dollar signs with variable names, or other system information that should not be displayedAffected if The output contains literal shell variables, environment variable references, or system paths that indicate the shell interpreted the output rather than displaying static text
You are affected if your Fabric OS version is earlier than 9.1.1c AND you can execute the listed privileged commands which expose shell variables in their output.
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 to Brocade Fabric OS 9.1.1c or later, or 9.2.0 and later to remediate this vulnerability.
Fabric OS 9.1.1c or later
- Upgrade Fabric Operating System to version 9.1.1c or later
- Verify the upgrade was successful by checking the firmware version using the 'version' command
- Test the affected commands (chassisdistribute, reboot, rasman, errmoduleshow, errfilterset, hassiscfgperrthreshold, supportshowcfgdisable, supportshowcfgenable) to confirm the vulnerability is resolved
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,120.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-31429 — 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-2023-31429 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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- 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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