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Wireless Lan ControllerApplication · Cisco

CVE-2016-9195

MEDIUM · 5.3 CVSS v3.0 Published 2017-04-07
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
62/100
Remediation priority · Elevated
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
A vulnerability in RADIUS Change of Authorization (CoA) request processing in the Cisco Wireless LAN Controller (WLC) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition by disconnecting a single connection. This vulnerability affects Cisco Wireless LAN Controller running software release 8.3.102.0. More Information: CSCvb01835. Known Fixed Releases: 8.4(1.49) 8.3(111.0) 8.3(108.0) 8.3(104.24) 8.3(102.3).

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

A vulnerability in RADIUS Change of Authorization (CoA) request processing in Cisco Wireless LAN Controller allows an unauthenticated, remote attacker to cause a denial of service by disconnecting a single connection. The vulnerability exists in software release 8.3.102.0 when processing specially crafted CoA requests.

MitigationUpgrade Cisco WLC to one of the fixed releases: 8.4(1.49), 8.3(111.0), 8.3(108.0), 8.3(104.24), or 8.3(102.3. Prior to upgrade, validate current version and plan maintenance window.

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
Wireless Lan ControllerApplication
Affected:= 8.3.102.0

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
None
Integrity
None
Availability
Low

CVSS:3.0/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 checks

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

  1. Confirm Cisco WLC device
    Access the WLC CLI and run 'show inventory' or check the web interface under Monitor to identify the device type
    Affected if Device is a Cisco Wireless LAN Controller
  2. Identify software version
    Run 'show version' on the WLC CLI or check the web interface under Controller > General to view the firmware version
    Affected if Version is exactly 8.3.102.0
  3. Verify RADIUS CoA is enabled
    Run 'show radius auth statistics' or check the web interface under Security > RADIUS > Authentication. Look for Change of Authorization settings
    Affected if RADIUS CoA processing is enabled and the version is 8.3.102.0

The environment is affected only if the Cisco WLC runs exactly version 8.3.102.0 AND has RADIUS Change of Authorization feature enabled.

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

Upgrade Cisco WLC to one of the fixed releases: 8.4(1.49), 8.3(111.0), 8.3(108.0), 8.3(104.24), or 8.3(102.3. Prior to upgrade, validate current version and plan maintenance window.

Fix this in Wireless Lan Controller Scoped from the published advisory
  • Consultation3.0 h
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA2.0 h
12.0 hours of engineering $2,130
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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-2016-9195 in production — separate from our analysis above.

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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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