CVE - CVE-2021-4189

CVE-ID
CVE-2021-4189	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
CONFIRM:https://security.netapp.com/advisory/ntap-20221104-0004/ MISC:https://access.redhat.com/security/cve/CVE-2021-4189 URL:https://access.redhat.com/security/cve/CVE-2021-4189 MISC:https://bugs.python.org/issue43285 URL:https://bugs.python.org/issue43285 MISC:https://bugzilla.redhat.com/show_bug.cgi?id=2036020 URL:https://bugzilla.redhat.com/show_bug.cgi?id=2036020 MISC:https://github.com/python/cpython/commit/0ab152c6b5d95caa2dc1a30fa96e10258b5f188e URL:https://github.com/python/cpython/commit/0ab152c6b5d95caa2dc1a30fa96e10258b5f188e MISC:https://python-security.readthedocs.io/vuln/ftplib-pasv.html URL:https://python-security.readthedocs.io/vuln/ftplib-pasv.html MISC:https://security-tracker.debian.org/tracker/CVE-2021-4189 URL:https://security-tracker.debian.org/tracker/CVE-2021-4189 MLIST:[debian-lts-announce] 20230524 [SECURITY] [DLA 3432-1] python2.7 security update URL:https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html MLIST:[debian-lts-announce] 20230630 [SECURITY] [DLA 3477-1] python3.7 security update URL:https://lists.debian.org/debian-lts-announce/2023/06/msg00039.html
Assigning CNA
Red Hat, Inc.
Date Record Created
20211229	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20211229)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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