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Missing AuthenticationWeakness · CWE-306

CVE-2024-36445

CRITICAL · 9.8 CVSS v3.1 Published 2024-08-22
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges 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
Swissphone DiCal-RED 4009 devices allow a remote attacker to gain a root shell via TELNET without authentication.

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 confidence

Unauthenticated remote code execution vulnerability in Swissphone DiCal-RED 4009 devices allows remote attackers to gain root shell access via TELNET without any credentials. The exposed TELNET service accepts connections from the network and provides direct root shell access, making this a critical pre-auth RCE with network-level exploitability.

MitigationImmediately disable the TELNET service if not business-critical, or restrict access to TELNET port (23) via firewall/network segmentation to prevent unauthorized external access. Contact Swissphone for firmware updates if available.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

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

CVSS:3.1/AV:N/AC:L/PR:N/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 checks

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

  1. Identify the device model
    Check the device label, web interface, or system information to confirm the model is Swissphone DiCal-RED 4009
    Affected if The device is a Swissphone DiCal-RED 4009 unit
  2. Detect if TELNET service is enabled
    Run 'netstat -tlnp' or 'ss -tlnp' on the device to check if port 23 (TELNET) is listening
    Affected if Port 23 is open and listening on the device
  3. Check if TELNET allows unauthenticated root access
    Connect to the device's TELNET port (e.g., using 'telnet <device_ip>' or 'nc <device_ip> 23') and observe if a root shell prompt appears without providing credentials
    Affected if Connecting to TELNET provides a root shell without requiring any username or password
  4. Assess network exposure of TELNET port
    From an external system, run 'nmap -p 23 <device_ip>' or 'nc -zv <device_ip> 23' to check if port 23 is accessible from the network
    Affected if Port 23 is reachable from untrusted network segments

If the device is a Swissphone DiCal-RED 4009 with TELNET port 23 open and accessible, and TELNET grants root shell access without authentication, the environment is affected by this CVE.

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.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Immediately disable the TELNET service if not business-critical, or restrict access to TELNET port (23) via firewall/network segmentation to prevent unauthorized external access. Contact Swissphone for firmware updates if available.

Have this fixed Scoped from the published advisory
  • Consultation4.0 h
  • Implementation4.0 h
  • Testing2.0 h
  • Review / QA2.0 h
12.0 hours of engineering $2,180
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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-2024-36445 in production — separate from our analysis above.

No notes yet

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What this is

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What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
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