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Sonos FirmwareOperating system · Sonos

CVE-2018-11316

CRITICAL · 9.6 CVSS v3.0 Published 2018-07-03
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

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
The UPnP HTTP server on Sonos wireless speaker products allow unauthorized access via a DNS rebinding attack. This can result in remote device control and privileged device and network information to be exfiltrated by an attacker.

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

The UPnP HTTP server on Sonos wireless speaker products is vulnerable to DNS rebinding attacks, which bypass same-origin protections and allow unauthorized remote access to the UPnP service. Attackers can achieve full device control and exfiltrate sensitive network topology and device information without authentication.

MitigationIsolate Sonos devices on a separate network segment from critical systems and disable UPnP on network edge devices to block external discovery attempts. Monitor for unauthorized UPnP traffic and apply vendor firmware updates when available.

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
Sonos FirmwareOperating system
Affected:all versions

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
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/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. Verify if Sonos device UPnP service is network-accessible
    Scan the local network for devices responding on UPnP port 1900/TCP and port 1900/UDP. Use tools like 'nmap -sU -p 1900 <subnet>' or 'ss -tulpn | grep 1900' to detect UPnP listeners.
    Affected if UPnP port 1900 is open and responding on the Sonos device IP address, indicating the UPnP HTTP server is accessible on the network.
  2. Confirm Sonos device is on same network segment as sensitive systems
    Review network topology and VLAN configuration. Check if the Sonos device IP address falls within the same subnet range as critical systems, servers, or workstations.
    Affected if The Sonos device shares a network segment or VLAN with systems that should be isolated (e.g., workstations containing sensitive data, management interfaces).
  3. Check if UPnP is enabled on network edge device
    Log into router, firewall, or network edge device and inspect UPnP settings. Common paths: Router admin UI under 'Advanced' > 'UPnP' or via command 'grep -i upnp /etc/config/network' on OpenWrt devices.
    Affected if UPnP or NAT-PMP is enabled on the network edge device, which can allow external discovery of internal Sonos devices.
  4. Identify Sonos device firmware version
    Access Sonos app > Settings > System > About My System, or query the device via UPnP SSDP: 'curl -X M-SEARCH -d "'MAN:"ssdp:discover"\nMX:3\nST: urn:schemas-upnp-org:device:MediaServer:1'" 239.255.255.250 -p 1900' and inspect the HTTP response headers for firmware version.
    Affected if The Sonos device runs any firmware version (all versions are affected per vendor advisory).

The user is affected if the Sonos device UPnP service (port 1900) is network-accessible and the device is not isolated on a separate network segment from critical systems.

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

Isolate Sonos devices on a separate network segment from critical systems and disable UPnP on network edge devices to block external discovery attempts. Monitor for unauthorized UPnP traffic and apply vendor firmware updates when available.

Fix this in Sonos Firmware Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA2.0 h
20.0 hours of engineering $3,500
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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-2018-11316 in production — separate from our analysis above.

No notes yet

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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