vulnerability

Huawei EulerOS: CVE-2021-4189: python3 security update

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:P/I:N/A:N)
Published
Apr 25, 2022
Added
May 9, 2022
Modified
Apr 1, 2026

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.

Solutions

huawei-euleros-2_0_sp10-upgrade-python3huawei-euleros-2_0_sp10-upgrade-python3-unversioned-command
Title
Rapid7 Labs

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