CVE-2024-43387
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 low privileged remote attacker can read and write files as root due to improper neutralization of special elements in the variable EMAIL_RELAY_PASSWORD in mGuard devices.
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 confidenceA command injection vulnerability exists in mGuard devices where the EMAIL_RELAY_PASSWORD variable is not properly sanitized, allowing a low-privileged remote attacker to inject special characters that enable arbitrary file read/write operations with root privileges. The improper neutralization of special elements in this configuration variable enables privilege escalation from a standard user to root access.
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< 8.9.3< 8.9.3< 8.9.3< 8.9.3< 8.9.3< 8.9.3< 8.9.3< 8.9.3CVSS 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:3.1/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 mGuard device modelAccess the device web interface or CLI and identify whether the device is an RS2000 or RS4000 variant with the specific cellular configuration (4g Vzw, 4g, 4g Att, or 3g)Affected if The device model matches any of the affected variants: RS4000 4g Vzw, RS4000 4g, RS4000 4g Att, RS4000 3g, RS2000 4g Vzw, RS2000 4g, RS2000 4g Att, or RS2000 3g
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Check the installed firmware versionLog into the mGuard device web interface or CLI and navigate to the system status or firmware information section to retrieve the current firmware version numberAffected if The firmware version is lower than 8.9.3
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Verify if email relay functionality is enabledAccess the device configuration settings and check whether the email relay feature is configured and active in the network or notification settingsAffected if Email relay is enabled and configured with an EMAIL_RELAY_PASSWORD variable set
A user is affected if they have an mGuard RS2000 or RS4000 variant with firmware version below 8.9.3 and the email relay feature with a configured password is enabled.
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 · scoped8.9.3
Restrict access to the email relay configuration interface and implement proper input validation/sanitization on the EMAIL_RELAY_PASSWORD variable to prevent injection of special characters that could be interpreted as file path operators or command separators.
Firmware version 8.9.3 or later
- 1. Identify the current firmware version of the Tc Mguard device by accessing the admin web interface or using the command line interface.
- 2. Navigate to the vendor's official support portal or contact Tc Mguard support to obtain the fixed firmware version 8.9.3 or later.
- 3. Review the vendor's firmware upgrade documentation and ensure all prerequisites are met (e.g., backup configuration, stable power).
- 4. Upload the new firmware file through the device's web interface or via secure file transfer (SCP/SFTP) as appropriate.
- 5. Initiate the firmware upgrade process and monitor for successful completion.
- 6. After reboot, verify the new firmware version is 8.9.3 or later and confirm the device is operational.
- 7. Test that the EMAIL_RELAY_PASSWORD functionality works correctly with the patched firmware.
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-2024-43387 — 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-2024-43387 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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