iOSOperating system · Cisco
CVE-2015-0608
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 · uneditedRace condition in the Measurement, Aggregation, and Correlation Engine (MACE) implementation in Cisco IOS 15.4(2)T3 and earlier allows remote attackers to cause a denial of service (device reload) via crafted network traffic that triggers improper handling of the timing of process switching and Cisco Express Forwarding (CEF) switching, aka Bug ID CSCul48736.
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 confidenceA race condition in the Measurement, Aggregation, and Correlation Engine (MACE) in Cisco IOS 15.4(2)T3 and earlier allows remote attackers to cause device reload via crafted network traffic that triggers improper handling of the timing between process switching and Cisco Express Forwarding (CEF) switching.
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\(2\)t3= 15.4\(1\)t= 15.4\(1\)t1= 15.4\(1\)t2= 15.4\(1\)t3= 15.4\(1\)t4= 15.4\(2\)t= 15.4\(2\)t1= 15.4\(2\)t2= 15.4tCVSS 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
- M
- Authentication
- None
- Confidentiality
- None
- Integrity
- None
- Availability
- Complete
AV:N/AC:M/Au:N/C:N/I:N/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 checksWork through these to decide whether this CVE applies to you.
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Identify the Cisco IOS versionRun 'show version' on the device and locate the IOS version string in the outputAffected if The version is 15.4(2)T3 or any earlier 15.4 version such as 15.4(1)t, 15.4(1)t1, 15.4(1)t2, 15.4(1)t3, 15.4(1)t4, 15.4(2)t, 15.4(2)t1, 15.4(2)t2, or 15.4t
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Verify if Cisco Express Forwarding (CEF) is enabledRun 'show cef summary' or 'show ip cef' to check CEF statusAffected if CEF is enabled and running on the device
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Confirm if MACE (Measurement, Aggregation, and Correlation Engine) is configuredRun 'show mace' or 'show policy-map type ifs' to check for MACE-related configuration and statusAffected if MACE is actively running or configured on the device
The device is affected if it runs Cisco IOS version 15.4(2)T3 or earlier AND has both CEF enabled AND MACE active, as the race condition requires the timing interaction between process switching and CEF switching within the MACE component to be triggered.
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 dataUpgrade to a Cisco IOS version beyond 15.4(2)T3 that addresses this vulnerability. For production environments, validate version compatibility and schedule a maintenance window for the upgrade.
Fix this in iOS
Scoped from the published advisory
- Consultation4.0 h
- Implementation4.0 h
- Testing2.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2015-0608 — 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-2015-0608 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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- Version or environment caveats, and links to real fixes
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