iOSOperating system · Cisco
CVE-2015-0669
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 · uneditedThe Autonomic Networking Infrastructure (ANI) implementation in Cisco IOS 15.4S and 15.4(3)S allows remote attackers to modify configuration settings or cause a denial of service (partial service outage) by sending crafted Autonomic Networking (AN) messages on an intranet network, aka Bug ID CSCup62167.
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 confidenceThe vulnerability exists in the Autonomic Networking Infrastructure (ANI) implementation of Cisco IOS 15.4S and 15.4(3)S. Remote attackers on the intranet can send crafted Autonomic Networking (AN) messages to either modify configuration settings or cause a partial denial of service. The attack vector is network-based (AV:N) with high attack complexity.
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
iOSOperating system
= 15.4\(3\)s= 15.4sCVSS 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
- Authentication
- None
- Confidentiality
- None
- Integrity
- Partial
- Availability
- Partial
AV:N/AC:L/Au:N/C:N/I:P/A:P
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 Cisco IOS versionExecute the 'show version' command on the device console or via remote access (SSH/Telnet). Locate the IOS version string in the output.Affected if The version shown is exactly 15.4(3)S or 15.4S (note: other 15.4.x versions are NOT affected)
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Confirm Autonomic Networking feature is enabledExecute 'show running-config | include autonomic' or 'show autonomic' to check if the Autonomic Networking Infrastructure feature is configured on the device.Affected if The feature is enabled (the vulnerability only exists when ANI is actively running)
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Check ANI process statusExecute 'show processes autonomic' or 'show ip autonomic' to verify the Autonomic Networking process is running.Affected if The ANI process is actively running on the device
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Assess network exposureReview the device interface configurations and ACLs to determine if the device is reachable from untrusted network segments on UDP port 4786 (AN protocol port) or any port accepting AN messages.Affected if The device is accessible from network segments containing untrusted or unknown hosts
You are affected only if your device runs exactly Cisco iOS 15.4(3)S or 15.4S, the Autonomic Networking feature is enabled, and the device is reachable from an untrusted network segment where an attacker could send crafted AN messages.
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.
From vendor dataApply the appropriate Cisco IOS security update or upgrade to a patched version. Until patching is feasible, restrict network access to the Autonomic Networking infrastructure by implementing network segmentation and access control lists to limit exposure to trusted internal users only.
Fix this in iOS
Scoped from the published advisory
- Consultation3.0 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-2015-0669 — 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-2015-0669 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
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