CVE-2024-7734
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 · uneditedAn unauthenticated remote attacker can exploit the behavior of the pathfinder TCP encapsulation service by establishing a high number of TCP connections to the pathfinder TCP encapsulation service. The impact is limited to blocking of valid IPsec VPN peers.
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 confidenceAn unauthenticated remote attacker can cause denial of service for legitimate IPsec VPN peers by establishing a high number of TCP connections to the pathfinder TCP encapsulation service, exhausting available connections and blocking valid peers from connecting.
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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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 device modelCheck the physical device label or log into the mGuard web interface to confirm the exact model number (RS2000 or RS4000 series variants)Affected if Device is not an RS2000 or RS4000 series mGuard VPN appliance
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Check firmware versionLog into the mGuard web interface or check via CLI: navigate to Status > System Information or run 'show version' to display the installed firmware versionAffected if Firmware version is below 8.9.3 (e.g., 8.9.2, 8.8.x, etc.)
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Verify pathfinder TCP encapsulation is enabledLog into the mGuard web interface and navigate to VPN > IPsec > TCP Encapsulation or check the configuration file for 'pathfinder' or 'tcp-encapsulation' settingsAffected if TCP encapsulation service is enabled and listening on the network
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Check for connection exhaustion symptomsMonitor the device logs (System > Log) or use CLI 'show connections' to inspect current TCP connection counts to the encapsulation port (typically port 4500 for IPsec NAT-T)Affected if Connection count is near the device limit or logs show connection refused errors from external IPs
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Review logs for attack indicatorsExamine system logs under Diagnostics > Log Files for repeated connection attempts from single or multiple external IP addresses in a short timeframeAffected if Logs show abnormally high number of new TCP connections from external sources within seconds or minutes
The environment is affected if the device is an mGuard RS2000 or RS4000 series running firmware below version 8.9.3 and the pathfinder TCP encapsulation service is enabled, allowing an attacker to exhaust connections and block legitimate VPN peers.
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
Implement connection rate limiting, connection pooling limits, or connection timeouts on the pathfinder TCP encapsulation service to prevent resource exhaustion from excessive incoming TCP connections.
Firmware version 8.9.3 or later
- Identify the current firmware version of the affected TC Mguard device by accessing the device management interface
- Obtain the fixed firmware version 8.9.3 or later from the vendor's official support channel (refer to cert.vde.com for vendor update)
- Backup the current device configuration before applying the update
- Upload the firmware update through the device's administrative interface or using the vendor's recommended upgrade procedure
- Apply the firmware update and wait for the device to reboot
- Verify the device is running firmware version 8.9.3 or later and confirm the pathfinder TCP encapsulation service is functioning correctly
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-7734 — 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-2024-7734 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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