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EUVD-2021-34049 · Published Aug 24, 2022
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.
Technologies
Redhat Software CollectionsNetapp Ontap Select Deploy Administration UtilityPython PythonDebian Debian LinuxRedhat Enterprise Linux
Weaknesses
CWE-252
CVSS scores
- v3.15.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
MITRE ATT&CK
InferredWhere this vulnerability fits in an attack
Initial Access
References
- https://access.redhat.com/security/cve/CVE-2021-4189
- https://bugs.python.org/issue43285
- https://bugzilla.redhat.com/show_bug.cgi?id=2036020
- https://github.com/python/cpython/commit/0ab152c6b5d95caa2dc1a30fa96e10258b5f188e
- https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html
- https://lists.debian.org/debian-lts-announce/2023/06/msg00039.html
Potentially impacted assets
See if this affects your attack surface
