CVE-2021-4189
Medium
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.
SeverityMedium
CVSS5.3
Exploit probability—
Product
Python
PublishedAug 24, 2022
First seenAug 24, 2022
Weakness typeCWE-252CWE-252
How to fix
Update
- python python3.6.14, 3.7.11, 3.8.9, 3.9.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| python python | 3.6.0 ≤ v < 3.6.14, 3.7.0 ≤ v < 3.7.11, 3.8.0 ≤ v < 3.8.9, 3.9.0 ≤ v < 3.9.3, 3.10.0 | 3.6.14, 3.7.11, 3.8.9, 3.9.3 |
| debian debian_linux | 10.0, 11.0 | — |
| redhat software_collections | No range specified | — |
| redhat enterprise_linux | 8.0 | — |
| netapp ontap_select_deploy_administration_utility | No range specified | — |
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