Unchecked Return Value Affecting pypy3 package, versions <7.3.5+dfsg-2


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.2% (58th percentile)

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  • Snyk IDSNYK-DEBIAN12-PYPY3-6751599
  • published2 May 2024
  • disclosed24 Aug 2022

Introduced: 24 Aug 2022

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

How to fix?

Upgrade Debian:12 pypy3 to version 7.3.5+dfsg-2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream pypy3 package and not the pypy3 package as distributed by Debian. See How to fix? for Debian:12 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