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iOSOperating system · Cisco

CVE-2015-0659

MEDIUM · 5.0 CVSS v2.0 Published 2015-03-06
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
59/100
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
The Autonomic Networking Infrastructure (ANI) implementation in Cisco IOS allows remote attackers to trigger self-referential adjacencies via a crafted Autonomic Networking (AN) message, aka Bug ID CSCup62157.

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 confidence

The vulnerability exists in the Autonomic Networking Infrastructure (ANI) implementation of Cisco IOS. Remote attackers can send specially crafted Autonomic Networking messages that trigger self-referential adjacencies, causing the ANI to create erroneous network neighbor relationships with itself.

MitigationApply Cisco IOS patches or upgrades as provided through their official security advisories for Bug ID CSCup62157. Until patched, consider disabling Autonomic Networking features if not required, and filter external AN messages at network boundaries.

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
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
Authentication
None
Confidentiality
None
Integrity
Partial
Availability
None

AV:N/AC:L/Au:N/C:N/I:P/A:N

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 Autonomic Networking feature is enabled
    Run 'show autonomic' or 'show ani status' in privileged EXEC mode to see if Autonomic Networking Infrastructure is active on the device
    Affected if Autonomic Networking is enabled and running on the device
  2. Check Cisco IOS version
    Run 'show version' and note the IOS release number
    Affected if Any version of Cisco IOS with Autonomic Networking enabled is affected (all versions are vulnerable)
  3. Inspect for self-referential AN adjacencies
    Run 'show ani adjacency' or 'show ip arp' to examine neighbor entries. Look for adjacencies where the neighbor IP address matches the device's own IP address
    Affected if The device shows neighbor relationships with its own IP address or self-referential entries in the AN adjacency table

The device is affected if Autonomic Networking is enabled and anomalous self-referential adjacencies are present in the AN neighbor table.

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

Apply Cisco IOS patches or upgrades as provided through their official security advisories for Bug ID CSCup62157. Until patched, consider disabling Autonomic Networking features if not required, and filter external AN messages at network boundaries.

Fix this in iOS 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-2015-0659 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • 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
  • No spam, self-promotion, credentials, or personal data