CVE-2009-5010: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in pyftpdlib

CVE-2009-5010 · Severity: medium · CVSS 4 · Published 2010-10-19

Race condition in the FTPHandler class in ftpserver.py in pyftpdlib before 0.5.1 allows remote attackers to cause a denial of service (daemon outage) by establishing and then immediately closing a TCP connection, leading to the accept function having an unexpected return value of None, a different vulnerability than CVE-2010-3494.

Technologies: pyftpdlib (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2009-5010 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2009-5010 being exploited in the wild.
How severe is CVE-2009-5010?
Medium severity, with a CVSS score of 4, published 19 October 2010.
Which products and versions are affected?
pyftpdlib (PyPI) ECOSYSTEM:introduced=0,fixed=0.5.1.
Is there a fix for CVE-2009-5010?
Yes. pyftpdlib (PyPI): upgrade to 0.5.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2009-5010?
Check whether you run pyftpdlib (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • pyftpdlib (PyPI): upgrade to 0.5.1 or later
    pip install "pyftpdlib>=0.5.1"

Affected products

  • pyftpdlib (PyPI) ECOSYSTEM:introduced=0,fixed=0.5.1

Identifiers

  • CVE-2009-5010
  • GHSA-mpg6-rgp4-35rr
  • PYSEC-2010-7

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