PT-2010-1813 · Python · Pyftpdlib

Published 2010-10-19 · Updated 2022-05-02 · CVE-2009-5011

Positive Technologies (AI Summary)

CVSS v4.0

6.3

Medium

Base vector

AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions pyftpdlib versions prior to 0.5.2

Description A race condition exists in the FTPHandler class in ftpserver.py, allowing remote attackers to cause a denial of service by establishing and then immediately closing a TCP connection. This leads to an error in the getpeername function, resulting in a daemon outage.

Recommendations For versions prior to 0.5.2, update to version 0.5.2 or later to resolve the issue. As a temporary workaround, consider implementing measures to handle and recover from TCP connection closures to minimize the risk of daemon outage.

Fix

Race Condition

Weakness Enumeration

CWE-362

Related Identifiers

CVE-2009-5011

GHSA-62XG-239J-VXG7

PYSEC-2010-8

Affected Products

Pyftpdlib

References · 13

• https://nvd.nist.gov/vuln/detail/CVE-2009-5011 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2009-5011 · Vendor Advisory
• https://osv.dev/vulnerability/PYSEC-2010-8 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2009-5011 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-62xg-239j-vxg7 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2009-5011 · Vendor Advisory
• https://github.com/giampaolo/pyftpdlib · Note
• https://github.com/pypa/advisory-database/tree/main/vulns/pyftpdlib/PYSEC-2010-8.yaml · Note
• http://code.google.com/p/pyftpdlib/source/browse/trunk/HISTORY · Note
• http://code.google.com/p/pyftpdlib/source/detail?r=543 · Note
• http://code.google.com/p/pyftpdlib/issues/detail?id=100 · Note
• https://github.com/advisories/GHSA-62xg-239j-vxg7 · Note
• http://code.google.com/p/pyftpdlib/source/diff?spec=svn543&r=543&format=side&path=/trunk/pyftpdlib/ftpserver.py · Note