Unchecked Return Value Affecting python27:2.7/python2-docutils package, versions <0:0.14-12.module+el8.1.0+3111+de3f2d8e


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.2% (58th percentile)

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  • Snyk IDSNYK-RHEL8-PYTHON27-4260169
  • 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?

Upgrade RHEL:8 python27:2.7/python2-docutils to version 0:0.14-12.module+el8.1.0+3111+de3f2d8e or higher.
This issue was patched in RHSA-2022:1821.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python27:2.7/python2-docutils package and not the python27:2.7/python2-docutils 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