iOSOperating system · Cisco

CVE-2015-6385

HIGH · 7.2 CVSS v2.0 Published 2015-12-01
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
77/100
Remediation priority · High
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 publish-event event-manager feature in Cisco IOS 15.5(2)S and 15.5(3)S on Cloud Services Router 1000V devices allows local users to execute arbitrary commands with root privileges by leveraging administrative access to enter crafted environment variables, aka Bug ID CSCux14943.

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

Local privilege escalation vulnerability in Cisco IOS on Cloud Services Router 1000V devices. The publish-event event-manager feature allows authenticated administrators to execute arbitrary commands with root privileges by entering crafted environment variables.

MitigationRestrict administrative access to trusted personnel, implement least privilege, and apply Cisco-provided patches when available. Monitor for unauthorized administrative sessions.

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:= 15.5\(2\)s= 15.5\(3\)s

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
Local
Complexity
Low
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete

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

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 device model and iOS version
    Run 'show version' command and look for 'CSR1000V' in the hardware description and check the iOS version number displayed
    Affected if Device is a Cloud Services Router 1000V and iOS version is exactly 15.5(2)s or 15.5(3)s
  2. Verify event-manager feature is configured
    Run 'show running-config | include event-manager' or 'show event-manager configuration' to see if Cisco Embedded Event Manager (EEM) is enabled
    Affected if The event-manager or publish-event feature is configured on the device
  3. Check for EEM policies with environment variables
    Run 'show event-manager policy' to list all registered EEM policies and inspect their configuration for environment variables
    Affected if Any EEM policies exist that use environment variables, especially those not created by the administrator
  4. Review recent EEM policy execution history
    Run 'show event-manager history policy' to see recent EEM policy triggers and check for unexpected executions
    Affected if EEM policies have been executed unexpectedly or at unusual times

The device is affected if it is a CSR1000V running iOS version 15.5(2)s or 15.5(3)s AND the event-manager feature is enabled, regardless of whether malicious EEM policies are currently visible.

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

Restrict administrative access to trusted personnel, implement least privilege, and apply Cisco-provided patches when available. Monitor for unauthorized administrative sessions.

Fix this in iOS Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA2.0 h
18.0 hours of engineering $3,200
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Scan for this in your stack

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dbcve dependency scanner

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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-2015-6385 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