CVE-2011-3997
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 · uneditedOpengear console servers with firmware before 2.2.1 allow remote attackers to bypass authentication, and modify settings or access connected equipment, via unspecified vectors.
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 confidenceOpengear console servers before firmware version 2.2.1 contain an authentication bypass vulnerability that allows remote attackers to circumvent authentication mechanisms. This enables unauthorized modification of device settings or access to connected equipment. The specific attack vectors were not publicly disclosed.
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<= 2.1.0u7= 2.0.4= 2.0.4u1= 2.0.6= 2.0.8= 2.0.9= 2.1.0= 2.1.0u1all versionsall 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
- Authentication
- None
- Confidentiality
- Partial
- Integrity
- Partial
- Availability
- Partial
AV:N/AC:L/Au:N/C:P/I:P/A:P
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 device modelAccess the device web interface or CLI and check the device information page for the model name (Acm5000, Cm4000, Im4004, Im4200, Img4000, Kcs6000, or generic Opengear Console Server)Affected if The device is any of the Opengear console server models listed in the affected products
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Check the installed firmware versionIn the device web interface, go to System > Status or use the CLI command 'version' to retrieve the firmware versionAffected if The firmware version is 2.1.0u7 or lower, OR exactly matches any of these: 2.0.4, 2.0.4u1, 2.0.6, 2.0.8, 2.0.9, 2.1.0, 2.1.0u1 (versions before 2.2.1 are affected)
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Confirm network exposure of management interfaceCheck if the device management interface (HTTP/HTTPS/SSH) is reachable from untrusted networks by reviewing firewall rules or network configurationAffected if The management interface is accessible from outside the local management network (the vulnerability allows remote authentication bypass)
You are affected if the device is an Opengear console server (Acm5000, Cm4000, Im4004, Im4200, Img4000, or Kcs6000) running firmware version 2.2.0 or lower, with its management interface exposed to network access.
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 Opengear console server firmware to version 2.2.1 or later. If immediate patching is not feasible, implement network segmentation and firewall controls to restrict access to management interfaces.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2011-3997 — 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-2011-3997 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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