CVE-2014-8414
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 · uneditedConfBridge in Asterisk 11.x before 11.14.1 and Certified Asterisk 11.6 before 11.6-cert8 does not properly handle state changes, which allows remote attackers to cause a denial of service (channel hang and memory consumption) by causing transitions to be delayed, which triggers a state change from hung up to waiting for media.
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 confidenceA denial of service vulnerability in Asterisk's ConfBridge conference module allows remote attackers to cause channel hang and excessive memory consumption by manipulating state transitions. The attack exploits delayed transitions that cause a state change from hung up to waiting for media, creating a resource exhaustion condition.
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<= 11.14.0= 11.6= 11.6.0CVSS 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
- None
- Availability
- Partial
AV:N/AC:L/Au:N/C:N/I:N/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 installed Asterisk versionRun 'asterisk -V' or 'asterisk --version' from the command line to obtain the exact version numberAffected if The version is 11.14.0 or lower for standard Digium Asterisk, or exactly 11.6 or 11.6.0 for Digium Certified Asterisk
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Confirm ConfBridge module is loadedRun 'module show like confbridge' in the Asterisk CLI to verify the ConfBridge module is loadedAffected if The ConfBridge module is loaded and available in the system
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Check for active conference bridgesRun 'confbridge show' or 'confbridge list' in the Asterisk CLI to see if any conferences are currently activeAffected if Active ConfBridge conferences exist in the system
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Review memory usage related to ConfBridgeMonitor memory consumption via 'core show memory' in the Asterisk CLI, specifically looking for elevated memory usage associated with ConfBridge channelsAffected if Memory usage appears unusually high for ConfBridge-related channels or there are channels stuck in unexpected ConfBridge states
A system is affected if it runs Asterisk version 11.14.0 or lower (or 11.6/11.6.0 for certified) AND has the ConfBridge module loaded, particularly when active conferences exist.
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 Asterisk to version 11.14.1/11.6-cert8 or later to obtain the fixed code. If immediate upgrade is not feasible, consider restricting or monitoring ConfBridge usage as a temporary mitigation.
- Consultation3.0 h
- Implementation4.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2014-8414 — 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-2014-8414 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
- No weaponised exploit code, or anything meant to cause harm
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