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Unchecked Return Value Affecting python2.7 package, versions <2.7.13-2+deb9u6

0.0
medium

Snyk CVSS

    Attack Complexity Low

    Threat Intelligence

    EPSS 0.18% (56th percentile)
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NVD
5.3 medium
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SUSE
5.3 medium
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Red Hat
5.3 medium

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  • Snyk ID SNYK-DEBIAN9-PYTHON27-2329035
  • published 1 Jan 2022
  • disclosed 24 Aug 2022
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Introduced: 1 Jan 2022

CVE-2021-4189 Open this link in a new tab
CWE-252 Open this link in a new tab

How to fix?

Upgrade Debian:9 python2.7 to version 2.7.13-2+deb9u6 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python2.7 package and not the python2.7 package as distributed by Debian. See How to fix? for Debian:9 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.