CVE-2021-4189
Python FTP Passive Mode Trusting Vulnerability
Description
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.
INFO
Published Date :
Aug. 24, 2022, 4:15 p.m.
Last Modified :
June 30, 2023, 11:15 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
1.4
Exploitability Score :
3.9
Affected Products
The following products are affected by CVE-2021-4189
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-4189.
| URL | Resource |
|---|---|
| https://access.redhat.com/security/cve/CVE-2021-4189 | Third Party Advisory |
| https://bugs.python.org/issue43285 | Patch Vendor Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=2036020 | Issue Tracking Patch Third Party Advisory |
| https://github.com/python/cpython/commit/0ab152c6b5d95caa2dc1a30fa96e10258b5f188e | Patch Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html | |
| https://lists.debian.org/debian-lts-announce/2023/06/msg00039.html | |
| https://python-security.readthedocs.io/vuln/ftplib-pasv.html | Patch Third Party Advisory |
| https://security-tracker.debian.org/tracker/CVE-2021-4189 | Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20221104-0004/ | Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-4189 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-4189 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Jun. 30, 2023
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2023/06/msg00039.html [No Types Assigned] -
CVE Modified by [email protected]
May. 24, 2023
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html [No Types Assigned] -
Modified Analysis by [email protected]
Dec. 08, 2022
Action Type Old Value New Value Changed Reference Type https://security.netapp.com/advisory/ntap-20221104-0004/ No Types Assigned https://security.netapp.com/advisory/ntap-20221104-0004/ Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Nov. 04, 2022
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20221104-0004/ [No Types Assigned] -
Initial Analysis by [email protected]
Aug. 29, 2022
Action Type Old Value New Value Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Changed Reference Type https://access.redhat.com/security/cve/CVE-2021-4189 No Types Assigned https://access.redhat.com/security/cve/CVE-2021-4189 Third Party Advisory Changed Reference Type https://bugs.python.org/issue43285 No Types Assigned https://bugs.python.org/issue43285 Patch, Vendor Advisory Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=2036020 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=2036020 Issue Tracking, Patch, Third Party Advisory Changed Reference Type https://github.com/python/cpython/commit/0ab152c6b5d95caa2dc1a30fa96e10258b5f188e No Types Assigned https://github.com/python/cpython/commit/0ab152c6b5d95caa2dc1a30fa96e10258b5f188e Patch, Third Party Advisory Changed Reference Type https://python-security.readthedocs.io/vuln/ftplib-pasv.html No Types Assigned https://python-security.readthedocs.io/vuln/ftplib-pasv.html Patch, Third Party Advisory Changed Reference Type https://security-tracker.debian.org/tracker/CVE-2021-4189 No Types Assigned https://security-tracker.debian.org/tracker/CVE-2021-4189 Third Party Advisory Added CWE NIST CWE-252 Added CPE Configuration OR *cpe:2.3:a:python:python:*:*:*:*:*:*:*:* versions from (including) 3.6.0 up to (excluding) 3.6.14 *cpe:2.3:a:python:python:*:*:*:*:*:*:*:* versions from (including) 3.7.0 up to (excluding) 3.7.11 *cpe:2.3:a:python:python:*:*:*:*:*:*:*:* versions from (including) 3.8.0 up to (excluding) 3.8.9 *cpe:2.3:a:python:python:*:*:*:*:*:*:*:* versions from (including) 3.9.0 up to (excluding) 3.9.3 *cpe:2.3:a:python:python:3.10.0:-:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:a:redhat:software_collections:-:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-4189 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-4189
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.37 }} 0.18%
score
0.73172
percentile