Unchecked Return Value Affecting python3 package, versions *


Severity

Recommended
0.0
medium
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
0.37% (74th percentile)

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  • Snyk IDSNYK-CENTOS7-PYTHON3-2328134
  • published30 Dec 2021
  • disclosed21 Dec 2021

Introduced: 21 Dec 2021

CVE-2021-4189  (opens in a new tab)
CWE-252  (opens in a new tab)

How to fix?

There is no fixed version for Centos:7 python3.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3 package and not the python3 package as distributed by Centos. See How to fix? for Centos:7 relevant fixed versions and status.

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.

CVSS Scores

version 3.1