Unchecked Return Value Affecting python3-libs package, versions <0:3.6.8-45.el8


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.37% (74th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-RHEL8-PYTHON3LIBS-4264659
  • 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)
First added by Snyk

How to fix?

Upgrade RHEL:8 python3-libs to version 0:3.6.8-45.el8 or higher.
This issue was patched in RHSA-2022:1986.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3-libs package and not the python3-libs package as distributed by RHEL. See How to fix? for RHEL:8 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