CVE-2021-4189
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.
CVE-2021-4189
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2021-4189
python
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "n/a",
"product": "python",
"versions": [
{
"status": "affected",
"version": "Fixed in python 3.6.14, python 3.7.11, python 3.8.9, python 3.9.3, python 3.10.0"
}
]
}
]- Related CVEs
- CVE-2021-4189
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #21656 · Revision 1
- Added to Heist Feed
- Publisher date