CVE-2021-4189

2022-08-2416:15:09

CWE-252

[email protected]

web.nvd.nist.gov

596

python

ftp

flaw

security

vulnerability

cve-2021-4189

5.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

6.2 Medium

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

55.7%

JSON

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.

Affected configurations

Vulners

NVD

Node

pythonpythonRange≤3.6.14

pythonpythonRange≤3.7.11

pythonpythonRange≤3.8.9

pythonpythonRange≤3.9.3

pythonpythonRange≤3.10.0

VendorProductVersionCPE
pythonpython*cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
pythonpython*cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
pythonpython*cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
pythonpython*cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
pythonpython*cpe:2.3:a:python:python:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
python	python	*	cpe:2.3:a:python:python::::::::
python	python	*	cpe:2.3:a:python:python::::::::
python	python	*	cpe:2.3:a:python:python::::::::
python	python	*	cpe:2.3:a:python:python::::::::
python	python	*	cpe:2.3:a:python:python::::::::

CNA Affected

[
  {
    "vendor": "n/a",
    "product": "python",
    "versions": [
      {
        "version": "Fixed in python 3.6.14, python 3.7.11, python 3.8.9, python 3.9.3, python 3.10.0",
        "status": "affected"
      }
    ]
  }
]