CVE-2017-2153
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 · uneditedSEIL/x86 Fuji 1.70 to 5.62, SEIL/BPV4 5.00 to 5.62, SEIL/X1 1.30 to 5.62, SEIL/X2 1.30 to 5.62, SEIL/B1 1.00 to 5.62 allows remote attackers to cause a denial of service via specially crafted IPv4 UDP 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 confidenceA denial of service vulnerability in SEIL firewall appliances (multiple models: SEIL/x86 Fuji, SEIL/BPV4, SEIL/X1, SEIL/X2, SEIL/B1) allows remote attackers to crash the device by sending specially crafted IPv4 UDP packets to the affected system.
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 dataall versionsall versionsall versionsall versionsall versionsCVSS 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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Identify the SEIL appliance modelAccess the device management interface or check the physical device label to confirm the model is one of: SEIL/x86 Fuji, SEIL/BPV4, SEIL/X1, SEIL/X2, or SEIL/B1Affected if The model matches any of these five affected models
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Check the firmware versionLog into the SEIL administrative interface or use the CLI command to display firmware version (typically 'show version' or via web UI system status page)Affected if The installed firmware version is below 5.63, or if it cannot be determined and the device is an affected model
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Verify IPv4 UDP exposureReview network configuration to determine if the SEIL appliance accepts IPv4 UDP traffic from untrusted networks. Check firewall rules, interface settings, and whether UDP port(s) are accessible from external networksAffected if The device has IPv4 UDP ports exposed to untrusted network interfaces or the internet
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Confirm the device is actively processing UDP trafficMonitor network traffic or check current connections/statistics showing active IPv4 UDP sessions reaching the SEIL deviceAffected if The device is processing or accepting IPv4 UDP packets from potentially malicious sources
The device is affected if it is any of the five SEIL models (SEIL/x86 Fuji, SEIL/BPV4, SEIL/X1, SEIL/X2, SEIL/B1) running firmware versions below 5.63 and it accepts IPv4 UDP traffic from accessible network segments.
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 dataApply the vendor firmware update to version 5.63 or later. As an interim measure, implement network-level filtering or firewall rules to block or rate-limit suspicious IPv4 UDP traffic destined to the SEIL appliance.
- Consultation3.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,984.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-2153 — 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-2017-2153 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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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.
- 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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