CVE-2003-1471
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 · uneditedMDaemon POP server 6.0.7 and earlier allows remote authenticated users to cause a denial of service (crash) via a (1) DELE or (2) UIDL with a negative number.
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 confidenceMDaemon POP server versions 6.0.7 and earlier contains a vulnerability in command handling where authenticated users can send DELE or UIDL commands with negative numbers, causing the server to crash due to improper input validation.
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<= 6.0.7CVSS 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
- M
- Authentication
- Single
- Confidentiality
- None
- Integrity
- None
- Availability
- Complete
AV:N/AC:M/Au:S/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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Verify MDaemon is installedCheck for MDaemon installation by looking in Program Files for Alt-N folder, or check Windows Services for MDaemon service, or check for mdaemon.exe process runningAffected if MDaemon POP server software is present on the system
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Determine MDaemon versionRight-click on mdaemon.exe in the MDaemon program directory, select Properties, then look at the Details tab for version information, or check the About screen within MDaemon's web admin interfaceAffected if Installed version is 6.0.7 or earlier (6.0.7, 6.0.6, 6.0.5, etc.)
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Confirm POP server is enabledCheck MDaemon configuration via WorldClient/web admin or by reviewing the MDaemon.ini file for POP3 server settings (look for section [POP3Server] and ensure Enabled=Yes)Affected if POP3 server component is enabled and accepting connections
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Verify user authentication is configuredCheck MDaemon's user management settings to confirm local user accounts or external authentication (LDAP/RADIUS) is enabled, allowing authenticated users access to POP servicesAffected if Authenticated user access to POP server is permitted (default configuration allows authenticated users)
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Test for vulnerability with negative command parameterConnect to POP server using telnet or netcat (POP port 110), authenticate with a valid user account, then send 'DELE -1' or 'UIDL -1' command and observe if server crashes or returns an errorAffected if Server crashes or becomes unresponsive when DELE or UIDL commands are issued with negative number parameters
System is affected if MDaemon version 6.0.7 or earlier is installed with POP3 server enabled and authenticated user access is permitted, as the negative number parameter crash can be triggered by any authenticated user.
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 MDaemon to a version newer than 6.0.7. If immediate upgrade is not feasible, restrict POP access to trusted authenticated users only to reduce attack surface.
- Consultation1.0 h
- Implementation2.0 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-2003-1471 — 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-2003-1471 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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