dbcve.org
PyftpdlibApplication · G.rodola

CVE-2007-6738

MEDIUM · 5.0 CVSS v2.0 Published 2010-10-19
Fix available
A fix is available. Upgrade to after 0.1 or later.
See remediation →
59/100
Remediation priority · Elevated
Remotely reachable No privileges Zero-click

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 · unedited
pyftpdlib before 0.1.1 does not choose a random value for the port associated with the PASV command, which makes it easier for remote attackers to obtain potentially sensitive information about the number of in-progress data connections by reading the response to this 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 confidence

pyftpdlib before version 0.1.1 uses predictable (non-random) port selection for PASV command responses, allowing remote attackers to infer the number of in-progress FTP data connections by observing the predictable port numbers returned.

MitigationUpgrade pyftpdlib to version 0.1.1 or later which implements random port selection for PASV data connections.

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
PyftpdlibApplication
Affected:<= 0.1

CVSS 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
None
Availability
None

AV:N/AC:L/Au:N/C:P/I:N/A:N

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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify pyftpdlib version
    Run 'pip show pyftpdlib' or 'python -c "import pyftpdlib; print(pyftpdlib.__version__)"' to get the installed version
    Affected if Version is 0.1.0 or lower, or the version string indicates a release before 0.1.1
  2. Confirm pyftpdlib is in use
    Check for Python processes running an FTP server using pyftpdlib, or inspect application code that imports and uses pyftpdlib.authorizers or pyftpdlib.FTPHandler
    Affected if pyftpdlib is actively running as an FTP server in the environment
  3. Verify PASV mode is enabled
    Inspect the FTP server configuration or code for 'pasv_enable=True' (the default) and check that PASV command responses are being returned to clients
    Affected if PASV mode is enabled and the server accepts PASV connections (default behavior)
  4. Compare version to affected range
    If version cannot be determined precisely, check the pyftpdlib release history or changelog for version 0.1.1
    Affected if The installed version is 0.1.0 or any version released before the 0.1.1 patch

The environment is affected if pyftpdlib version 0.1.0 or earlier is installed and actively running as an FTP server with PASV mode enabled.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 data
Upgrade available Upgrade to a release after 0.1
Interim mitigation

Upgrade pyftpdlib to version 0.1.1 or later which implements random port selection for PASV data connections.

Fix this in Pyftpdlib Scoped from the published advisory
  • Consultation1.0 h
  • Implementation1.0 h
  • Testing2.0 h
  • Review / QA1.0 h
5.0 hours of engineering $860
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,376.

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2007-6738 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

Get it on GitHub Scan in the browser

References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2007-6738 in production — separate from our analysis above.

No notes yet

Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.

What this is

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.

What belongs here
  • 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