CVE-2008-2173
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 · uneditedUnspecified vulnerability in Yamaha routers allows remote attackers to cause a denial of service (dropped session) via crafted BGP UPDATE messages, leading to route flapping, possibly a related issue to CVE-2007-6372.
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 confidenceYamaha routers contain an unspecified vulnerability where remote attackers can send crafted BGP UPDATE messages to cause dropped BGP sessions, resulting in route flapping (repeated routing table instability). This is related to CVE-2007-6372 and allows attackers to disrupt network stability through BGP protocol manipulation.
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 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:3.1/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 Yamaha router modelLog into the router CLI or web interface and run 'show version' or check the admin interface to confirm the device is a Yamaha router and note the firmware versionAffected if The device is a Yamaha router running any firmware version
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Check if BGP is enabledAccess the router configuration and look for 'bgp' statements in the configuration file, or run 'show bgp' command in the CLI to see if BGP is configuredAffected if BGP protocol is configured and enabled on the router
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Verify BGP session statusRun 'show bgp neighbor' or similar BGP status command to check the current state of BGP peers and sessionsAffected if Active BGP sessions exist and the router is participating in BGP routing
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Review BGP UPDATE message handlingCheck BGP logs or run debugging commands (if available) to inspect BGP UPDATE message processing and look for unexpected drops or errorsAffected if The router processes incoming BGP UPDATE messages from peers
A user is affected if they operate a Yamaha router with BGP protocol enabled, since all firmware versions of Yamaha routers are vulnerable to BGP session disruption via crafted UPDATE messages.
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 BGP route validation/filtering at network edges, and monitor for anomalous BGP UPDATE patterns that may indicate exploitation attempts.
- Consultation6.0 h
- Implementation12.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2008-2173 — 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-2008-2173 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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