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.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2022-08-24T00:00:00

Updated: 2024-08-03T17:16:04.264Z

Reserved: 2021-12-29T00:00:00

Link: CVE-2021-4189

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2022-08-24T16:15:09.827

Modified: 2023-06-30T23:15:09.980

Link: CVE-2021-4189

cve-icon Redhat

Severity : Moderate

Publid Date: 2021-12-21T00:00:00Z

Links: CVE-2021-4189 - Bugzilla