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CVE-2021-4189

Description

A flaw was found in Python, specifically in the FTP (File Transfer Protocol) client library in PASV (passive) mode. The issue is how the FTP client trusts the host from the PASV response by default. This flaw allows an attacker to set up a malicious FTP server that can trick FTP clients into connecting back to a given IP address and port. This vulnerability could lead to FTP client scanning ports, which otherwise would not have been possible.


Affected Software


CPE Name Name Version
python:python python 3.9.3
python:python python 3.8.9
python:python python 3.7.11
python:python python 3.6.14
python:python python 3.10.0
debian:debian_linux debian debian linux 10.0
debian:debian_linux debian debian linux 11.0
redhat:enterprise_linux redhat enterprise linux 8.0
redhat:software_collections redhat software collections -

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