CVE-2007-6738: Pyftpdlib Pyftpdlib Use Of Insufficiently Random Vulnerability

HIGH
Advisory Identifier: GHSA-gh7c-cg3x-pmcr
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CVSS 7.5
CWE-330
Published
Advisory Summary

CVE-2007-6738 is a HIGH (CVSS 7.5) pyftpdlib use of insufficiently random vulnerability (CWE-330: Use of Insufficiently Random Values) affecting Pyftpdlib libraries in the PyPI ecosystem. The issue involves pyftpdlib use of insufficiently random values of port selection on pasv command. Remediation is available by upgrading affected packages to version 0.1.1.

CVE-2007-6738 at a Glance

CVE Identifier CVE-2007-6738
GHSA Identifier GHSA-gh7c-cg3x-pmcr
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-330: Use of Insufficiently Random Values
Affected Product Pyftpdlib
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2007-6738

To remediate this vulnerability, upgrade all affected Pyftpdlib dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

pyftpdlib fixed: 0.1.1 
pip install pyftpdlib>=0.1.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show pyftpdlib

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2007-6738, inspect your installed packages using pip:

pip show pyftpdlib

Analyze the terminal output to locate any version of Pyftpdlib in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.1.1), your application is affected.

Note: The pip show pyftpdlib command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-330: Use of Insufficiently Random Values, where the product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers. In Pyftpdlib, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2007-6738 Affected Pyftpdlib Versions

1 component(s)
Fixed Versions:
0.1.1
Product / Package Ecosystem Affected Versions Fixed Version
pyftpdlib
pypi/pyftpdlib
PyPI
< 0.1.1
0.1.1

References

NVD — CVE-2007-6738 NVD
https://nvd.nist.gov/vuln/detail/CVE-2007-6738
Security Fix Commit FIX COMMIT
https://github.com/giampaolo/pyftpdlib/commit/d171bdc4ef7ac769671946a8a3e5eaafc39a9202
Pyftpdlib Source Repository REPOSITORY
https://github.com/giampaolo/pyftpdlib
Pyftpdlib Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/pyftpdlib/PYSEC-2010-22.yaml
code.google.com/p/pyftpdlib/source/... WEB
http://code.google.com/p/pyftpdlib/source/browse/trunk/HISTORY

Frequently Asked Questions

What is CVE-2007-6738?
CVE-2007-6738 is a security vulnerability in Pyftpdlib involving pyftpdlib Use of Insufficiently Random Values of port selection on PASV command under CWE-330: Use of Insufficiently Random Values.
Which Pyftpdlib versions are affected?
Affected versions include releases prior to 0.1.1 across affected packages: pyftpdlib.
What version fixes CVE-2007-6738?
Upgrading to 0.1.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is pyftpdlib affected?
Yes, pyftpdlib is affected in releases prior to 0.1.1. Upgrade your dependency to 0.1.1 or later.
What is the CVSS score of CVE-2007-6738?
CVE-2007-6738 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2007-6738?
CVE-2007-6738 is classified under CWE-330: Use of Insufficiently Random Values (The product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers.).
How can I check PyPI dependencies for CVE-2007-6738?
Run the dependency tree command: 'pip show pyftpdlib'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-gh7c-cg3x-pmcr",
  "modified" : "2024-10-21T21:00:56Z",
  "published" : "2022-05-01T18:45:57Z",
  "aliases" : [ "CVE-2007-6738" ],
  "summary" : "pyftpdlib Use of Insufficiently Random Values of port selection on PASV command",
  "details" : "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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "pyftpdlib"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.1.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2007-6738"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/giampaolo/pyftpdlib/commit/d171bdc4ef7ac769671946a8a3e5eaafc39a9202"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/giampaolo/pyftpdlib"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/pyftpdlib/PYSEC-2010-22.yaml"
  }, {
    "type" : "WEB",
    "url" : "http://code.google.com/p/pyftpdlib/source/browse/trunk/HISTORY"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-330" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-04-29T14:38:49Z",
    "nvd_published_at" : "2010-10-19T20:00:00Z"
  }
}