CVE-2017-2300
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 · uneditedOn Juniper Networks SRX Series Services Gateways chassis clusters running Junos OS 12.1X46 prior to 12.1X46-D65, 12.3X48 prior to 12.3X48-D40, 12.3X48 prior to 12.3X48-D60, flowd daemon on the primary node of an SRX Series chassis cluster may crash and restart when attempting to synchronize a multicast session created via crafted multicast packets.
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 confidenceThe flowd daemon on the primary node of an SRX Series chassis cluster crashes and restarts when attempting to synchronize a multicast session that was created using specifically crafted multicast packets, resulting in denial of service.
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<= 12.1x46<= 12.3x48CVSS 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
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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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Confirm device is SRX SeriesRun 'show chassis hardware' or 'show system information' to verify the device model is an SRX Series applianceAffected if Device model is not an SRX Series device (vulnerability only affects SRX Series in chassis cluster)
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Verify chassis cluster is enabledRun 'show chassis cluster status' to confirm the devices are configured as a chassis clusterAffected if Chassis cluster is not configured (vulnerability requires primary/secondary node cluster setup)
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Check Junos versionRun 'show version' to obtain the installed Junos versionAffected if Version is 12.1X46 or lower, or 12.3X48 or lower (these are the affected version ranges)
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Confirm multicast is enabledRun 'show multicast interface' or 'show configuration protocols pim' to check if multicast routing/PIM is configuredAffected if Multicast protocols are enabled and traffic is flowing (vulnerability triggers during multicast session synchronization)
Environment is affected only if: (1) device is SRX Series, (2) chassis cluster is configured, (3) Junos version is 12.1X46-D65 or earlier for 12.1X46 train OR 12.3X48-D40 or earlier for 12.3X48 train, AND (4) multicast traffic/sessions are active or configured
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 Junos OS to version 12.1X46-D65 or later for the 12.1X46 train, 12.3X48-D40 or later for the 12.3X48 train, or 12.3X48-D60 or later for the 12.3X48-D train.
- Consultation4.0 h
- Implementation8.0 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-2017-2300 — 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-2017-2300 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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