OnsApplication · Cisco
CVE-2008-3818
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 · uneditedCisco ONS 15310-CL, 15310-MA, 15327, 15454, 15454 SDH, and 15600 with software 7.0.2 through 7.0.6, 7.2.2, 8.0.x, 8.5.1, and 8.5.2 allows remote attackers to cause a denial of service (control-card reset) via a crafted TCP session.
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 confidenceCisco ONS optical networking platforms (15310-CL, 15310-MA, 15327, 15454, 15454 SDH, and 15600) running affected software versions (7.0.x through 8.5.2) contain a vulnerability in TCP session handling that allows remote attackers to trigger a control-card reset via a specially crafted TCP session, causing 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
OnsApplication
= 7.0.2= 7.0.4= 7.0.5= 7.2.0= 7.2.2= 8.0= 8.5.0= 8.5.1= 8.5.2
Ons 15600Hardware / appliance
all 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
- Authentication
- None
- Confidentiality
- None
- Integrity
- None
- Availability
- Complete
AV:N/AC:L/Au:N/C:N/I:N/A:C
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 ONS platform modelDetermine the exact Cisco ONS platform hardware model (15310-CL, 15310-MA, 15327, 15454, 15454 SDH, or 15600) from device labeling or inventoryAffected if Model is 15600 (all versions affected) or model is one of 15310-CL, 15310-MA, 15327, 15454, or 15454 SDH running vulnerable software
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Check installed software versionAccess the ONS device via CLI or TL1 interface and retrieve the running software version using commands such as 'show version' or equivalent TL1 commandAffected if Version falls within 7.0.x through 8.5.2 range, or for 15600 model any version
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Verify TCP-based management accessConfirm that TCP-based management interfaces (such as ONS element manager, craft terminal, or network management access) are enabled and reachable on the deviceAffected if TCP management or control-plane access is enabled, as the vulnerability is exploited via specially crafted TCP sessions
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Assess network exposureDetermine if the ONS device management TCP ports are exposed to untrusted or external networks rather than being restricted to a trusted management networkAffected if Device is directly accessible from untrusted networks via TCP
User is affected if running a Cisco ONS 15600 on any software version, or any 15310-CL/15310-MA/15327/15454/15454 SDH platform with software version 7.0.x through 8.5.2, and the device has TCP-based management interfaces accessible to network attackers.
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 appropriate Cisco software update for the specific ONS platform; Cisco has released fixes in later software versions. If immediate patching is not possible, consider network segmentation or firewall rules to limit exposure to untrusted networks.
Fix this in Ons
Scoped from the published advisory
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,176.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2008-3818 — 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-2008-3818 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
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