CVE-2018-9076
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 · uneditedFor some Iomega, Lenovo, LenovoEMC NAS devices versions 4.1.402.34662 and earlier, when changing the name of a share, an attacker can craft a command injection payload using backtick "``" characters in the name parameter. As a result, arbitrary commands may be executed as the root user. The attack requires a value __c and iomega parameter.
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 confidenceThis is a command injection vulnerability in Iomega, Lenovo, and LenovoEMC NAS devices where the share name parameter fails to sanitize backtick characters (`) during share name modification. An attacker can inject shell commands via command substitution using backticks, achieving arbitrary code execution as the root user. The attack requires the __c and iomega parameters, suggesting it's exploitable through the web interface.
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<= 4.1.402.34662CVSS 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
- High
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:N/AC:H/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 if the device is a LenovoEMC or Iomega NASAccess the device's web interface or check the device model/serial number. Look for 'LenovoEMC', 'Iomega', or 'Lenovo' branding in the NAS management console or physical device label.Affected if The device is a LenovoEMC or Iomega NAS product.
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Check the installed firmware versionLog into the NAS administrative interface and navigate to System Settings or About section. Look for the firmware version number (e.g., 4.1.402.34662 or similar).Affected if The firmware version is 4.1.402.34662 or earlier.
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Verify if the legacy web management interface is accessibleAttempt to access the web interface via HTTP/HTTPS on the typical NAS management ports (usually 80, 443, 8080, or 8443). Look for endpoints containing '__c' and 'iomega' parameters in URLs or form submissions.Affected if The legacy Iomega/EMC web interface is accessible and accepts share name modifications.
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Check if remote administration is enabledIn the NAS settings, look for remote access or remote administration settings. Determine if the management interface is exposed to untrusted networks.Affected if Remote administration is enabled and the NAS is accessible from untrusted networks.
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Review share names for unexpected charactersIn the NAS storage/shares management panel, inspect all configured share names. Look for any shares containing backtick characters (`) or other shell metacharacters that were not intentionally created.Affected if Any share name contains backtick characters or appears to have been modified unexpectedly.
A user is affected if they have a LenovoEMC or Iomega NAS running firmware version 4.1.402.34662 or earlier, with the legacy web management interface accessible and potentially exposed 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 dataUpgrade NAS firmware to a version later than 4.1.402.34662; if no patch is available, implement strict input validation to reject special characters including backticks in share name parameters at the application layer.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA3.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-9076 — 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-2018-9076 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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