CVE-2006-6742
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 · uneditedMultiple buffer overflows in FTP Print Server 2.4 and 2.4.5 in HP LaserJet 5000 Series printers with firmware R.25.15 or R.25.47, and HP LaserJet 5100 Series printers with firmware V.29.12, allow remote attackers to cause a denial of service (device crash) via a long string in the (1) LIST or (2) NLST command.
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 confidenceBuffer overflow vulnerabilities in the FTP Print Server component of HP LaserJet 5000 Series (firmware R.25.15/R.25.47) and 5100 Series (firmware V.29.12) printers allow remote attackers to crash the device by sending excessively long strings in FTP LIST or NLST commands.
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= 2.4= 2.4.5= r.25.15= r.25.47= v.29.12CVSS 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 printer modelAccess the printer's embedded web server (EWS) via browser or check the physical label to confirm the model is HP LaserJet 5000 Series or 5100 SeriesAffected if Model is HP LaserJet 5000 or 5100 series
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Check firmware versionVia EWS navigate to the Information or Support page, or print a configuration page from the printer control panel, and locate the firmware version stringAffected if Firmware version equals R.25.15, R.25.47 (5000 series), or V.29.12 (5100 series)
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Check FTP Print Server statusVia EWS locate the FTP Print Server or Print Server settings under Networking or Services settings, and verify if FTP printing is enabledAffected if FTP Print Server feature is enabled and active
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Verify FTP service accessibilityFrom a remote system attempt to connect to the printer's IP on TCP port 21 (FTP) or check firewall rules to confirm UDP/TCP 21 is open to the printerAffected if FTP port 21 is open and reachable from untrusted networks
A user is affected if they have an HP LaserJet 5000 (firmware R.25.15 or R.25.47) or 5100 (firmware V.29.12) with the FTP Print Server enabled and accessible, as the buffer overflow can be triggered by long LIST or NLST commands.
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 dataNetwork isolation or disabling of the FTP print server feature is recommended; if FTP printing is required, restrict network access to trusted hosts only via firewall rules or VLAN segmentation.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
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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-2006-6742 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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