CVE-2018-0681
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 · uneditedDenbun by NEOJAPAN Inc. (Denbun POP version V3.3P R4.0 and earlier, Denbun IMAP version V3.3I R4.0 and earlier) uses hard-coded credentials, which may allow remote attackers to login to the Management page and change the configuration.
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 confidenceDenbun email webmail software contains hard-coded credentials embedded in the codebase that provide direct access to the administrative management interface. Remote attackers can exploit these credentials to authenticate as administrators and modify system configuration settings.
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<= 3.3i_r4.0<= 3.3p_r4.0CVSS 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 Denbun installationLook for Denbun email webmail software in typical installation directories such as /var/www/html/denbun, C:\inetpub\wwwroot\denbun, or check your system packages for installed webmail software.Affected if Denbun email webmail software is installed on the system.
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Determine installed versionLocate the version file or check the About section in the Denbun administrative interface. Common paths include VERSION.txt in the installation directory or version information in the main index file.Affected if The installed version is Neo Debun Imap <= 3.3i_r4.0 or Neo Debun Pop <= 3.3p_r4.0.
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Check if management interface is accessibleAttempt to access the administrative interface path, typically at /mm/ or /admin/ relative to the Denbun installation root. Use network scanning tools (such as nmap) or web browser to verify if TCP port 80/443 is listening and the management interface is reachable from network.Affected if The Denbun management interface is network-accessible (not localhost-only or firewalled).
Your environment is affected if Denbun (Neo Debun Imap or Neo Debun Pop) version 3.3i_r4.0 or earlier (Imap) or 3.3p_r4.0 or earlier (Pop) is installed and its management interface is network-accessible, because the hard-coded administrative credentials are embedded in the codebase of these versions.
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.
dbcve · scopedImmediately change all default administrative passwords, disable remote access to the management interface if not required, and contact vendor for patched version that removes hard-coded credentials. Implement network segmentation to limit management interface exposure.
V3.3P R4.1 or later for POP; V3.3I R4.1 or later for IMAP (obtain exact fixed version from vendor)
- Contact NEOJAPAN Inc. directly to obtain the latest fixed version of Denbun POP and Denbun IMAP
- Request the specific version numbers that address CVE-2018-0681 from the vendor
- Upgrade Denbun POP to a version newer than V3.3P R4.0
- Upgrade Denbun IMAP to a version newer than V3.3I R4.0
- After upgrading, immediately change all default passwords for administrative accounts
- Verify the hard-coded credentials are no longer present in the upgraded version
- Restrict network access to the Management page to trusted IPs only as an additional safeguard
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation1.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-0681 — 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-2018-0681 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
- No spam, self-promotion, credentials, or personal data