CVE-2017-1000020
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 · uneditedSYN Flood or FIN Flood attack in ECos 1 and other versions embedded devices results in web Authentication Bypass. "eCos Embedded Web Servers used by Multiple Routers and Home devices, while sending SYN Flood or FIN Flood packets fails to validate and handle the packets and does not ask for any sign of authentication resulting in Authentication Bypass. An attacker can take complete advantage of this bug and take over the device remotely or locally. The bug has been successfully tested and reproduced in some versions of SOHO Routers manufactured by TOTOLINK, GREATEK and others."
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 confidenceeCos embedded web servers in routers and home devices fail to properly validate and handle SYN Flood or FIN Flood packets, causing the authentication mechanism to be bypassed. An attacker can send these specially crafted flood packets to bypass authentication and gain complete control of the device remotely.
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<= 1.3.1CVSS 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
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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 eCos web server presenceScan your network for web servers on common ports (80, 443, 8080) and examine HTTP response headers or service banners for 'eCos' or 'embedded web server' references. Check device firmware or documentation to confirm eCos-based web server usage.Affected if A web server with eCos embedded platform is running and accessible on your network
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Determine eCos versionExamine HTTP headers, server banners, or firmware metadata to find the exact eCos web server version. Compare the version number against the affected range: version 1.3.1 or lower.Affected if The installed eCos web server version is 1.3.1 or lower
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Verify web authentication is exposedAccess the web interface and confirm whether authentication is required. Check if the login page or admin panel is reachable without prior authentication, or if certain endpoints bypass auth checks.Affected if The web authentication interface is directly reachable from the network you are testing
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Check network exposure of the web interfaceDetermine if the eCos web server is accessible from untrusted networks (WAN/Internet) or only from trusted segments (LAN). Review firewall rules and access control lists governing the device.Affected if The eCos web server is accessible from networks outside your trusted internal segment
You are affected if an eCos embedded web server version 1.3.1 or lower is running, its authentication interface is exposed to your network, and the device lacks additional SYN/FIN flood protection at the network perimeter.
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 vendor firmware updates when available; implement network-level rate limiting, firewall rules, or IPS/IDS to detect and block SYN/FIN flood attempts; consider network segmentation for affected devices.
- Consultation8.0 h
- Implementation16.0 h
- Testing12.0 h
- Review / QA6.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-1000020 — 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-2017-1000020 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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