dbcve.org
G42 FirmwareOperating system · Nokia

CVE-2025-27023

MEDIUM · 6.5 CVSS v3.1 Published 2025-07-02
Fix available
A fix is available. Upgrade to 7.1 or later.
See remediation →
71/100
Remediation priority · Elevated
Remotely reachable Zero-click

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
Lack or insufficent input validation in WebGUI CLI web in Infinera G42 version R6.1.3 allows remote authenticated users to read all OS files via crafted CLI commands. Details: The web interface based management of the Infinera G42 appliance enables the feature of executing a restricted set of commands. This feature also offers the option to execute a script-file already present on the target device. When a non-script or incorrect file is specified, the content of the file is shown along with an error message. Due to an execution of the http service with a privileged user all files on the file system can be viewed this way.

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

Infinera G42 R6.1.3 contains an arbitrary file read vulnerability in the WebGUI CLI feature. The script-file execution function does not validate input properly, and when a non-script or incorrect filename is provided, the file content is returned with an error message. Because the http service runs with privileged user context, any authenticated user can read arbitrary OS files by specifying the full path in this parameter.

MitigationApply vendor patch when available. Until then, restrict user access to the CLI web interface, implement input validation on the script filename parameter, and ensure the http service runs with least-privilege user context rather than elevated privileges.

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
G42 FirmwareOperating system
Affected:>= 6.1.3, < 7.1

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
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/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 checks

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

  1. Check firmware version
    Access the device admin interface or use CLI command 'show version' to retrieve the installed firmware version
    Affected if Version is greater than or equal to 6.1.3 and less than 7.1
  2. Verify WebGUI CLI access
    Log into the WebGUI and navigate to the CLI feature section, or check if the CLI web interface endpoint is accessible to authenticated users
    Affected if WebGUI CLI feature is enabled and accessible to non-privileged users
  3. Confirm service privilege context
    Check the http service configuration to determine if it runs with privileged (root/administrator) user context rather than a limited service account
    Affected if HTTP service runs with elevated/privileged user privileges
  4. Test arbitrary file read (if authorized)
    Using an authenticated user session, attempt to access the script-file execution function with an absolute file path such as /etc/passwd as the filename parameter
    Affected if File content is returned or accessible without proper validation

The environment is affected if the firmware version falls within 6.1.3 to 7.0.x range AND the WebGUI CLI feature is accessible to authenticated users running with elevated privileges.

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.

dbcve · scoped
Upgrade available Upgrade to 7.1 or later
Fixed in 7.1
Interim mitigation

Apply vendor patch when available. Until then, restrict user access to the CLI web interface, implement input validation on the script filename parameter, and ensure the http service runs with least-privilege user context rather than elevated privileges.

Recommended fix Moderate confidence

G42 firmware version 7.1 or later

  1. Contact Infinera support or access the official Infinera support portal to obtain the G42 firmware upgrade
  2. Download G42 firmware version 7.1 or later
  3. Review Infinera's official firmware upgrade documentation for G42 devices
  4. Execute the firmware upgrade following Infinera's standard upgrade procedure
  5. Verify the upgrade completed successfully and confirm the device is running version 7.1 or later
  6. Test that the WebGUI CLI functionality works correctly with the new firmware

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in G42 Firmware 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
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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-2025-27023 in production — separate from our analysis above.

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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
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