Updated: 2025-12-28 04:13:25.406876
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.
| Links | NIST | CIRCL | RHEL | Ubuntu |
| Severity | Score | |
|---|---|---|
| CVSS Version 2.x | 0.0 | |
| CVSS Version 3.x | MEDIUM | 5.3 |
| OS name | Project name | Version | Score | Severity | Status | Errata | Last updated | Statement |
|---|---|---|---|---|---|---|---|---|
| Alpine Linux 3.22 | python | 3.9 | 5.3 | MEDIUM | Not Vulnerable | 2026-02-02 14:29:44 | Not affected: the environment uses Python 3.9.23, while the PASV host‑trust flaw in ftplib was fix... | |
| Alpine Linux 3.22 | python | 3.7 | 5.3 | MEDIUM | Not Vulnerable | 2026-02-16 14:39:47 | Not affected: the environment uses Python 3.9.23, while the PASV host‑trust flaw in ftplib was fix... | |
| Alpine Linux 3.22 | python | 3.8 | 5.3 | MEDIUM | Not Vulnerable | 2026-02-07 04:07:29 | Not affected: the environment uses Python 3.9.23, while the PASV host‑trust flaw in ftplib was fix... | |
| Alpine Linux 3.22 | python | 3.6 | 5.3 | MEDIUM | Not Vulnerable | 2026-01-27 16:42:39 | Not affected: the environment uses Python 3.9.23, while the PASV host‑trust flaw in ftplib was fix... | |
| Debian 10 | python | 3.6 | 5.3 | MEDIUM | Already Fixed | 2025-09-09 19:24:55 | ||
| Debian 11 | python | 3.6 | 5.3 | MEDIUM | Already Fixed | 2025-09-09 19:24:54 | ||
| Debian 12 | python | 3.9 | 5.3 | MEDIUM | Not Vulnerable | 2025-12-11 07:44:24 | Not affected: the environment uses Python 3.9.23, while the PASV host‑trust flaw in ftplib was fix... | |
| Debian 12 | python | 3.7 | 5.3 | MEDIUM | Not Vulnerable | 2025-12-11 07:45:02 | Not affected: the environment uses Python 3.9.23, while the PASV host‑trust flaw in ftplib was fix... | |
| Debian 12 | python | 3.6 | 5.3 | MEDIUM | Already Fixed | 2025-09-09 19:24:54 | Not affected: the environment uses Python 3.9.23, while the PASV host‑trust flaw in ftplib was fix... | |
| Debian 12 | python | 3.8 | 5.3 | MEDIUM | Not Vulnerable | 2025-12-11 07:45:01 | Not affected: the environment uses Python 3.9.23, while the PASV host‑trust flaw in ftplib was fix... |