Vulnerability in NetApp Ontap Select Deploy Administration Utility
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.032 (87.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 87.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.032 · newest: 0.032 · change: 0.000
Affected products
- NetApp Ontap Select Deploy Administration Utility
- Python — versions 3.10.0
- Debian Linux — versions 10.0, 11.0
- Red Hat Enterprise Linux — versions 8.0
- Red Hat Software Collections
- Python — versions Fixed in python 3.6.14, python 3.7.11, python 3.8.9, python 3.9.3, python 3.10.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugs.python.org/issue43285 (Patch, Vendor Advisory)
- python-security.readthedocs.io/vuln/ftplib-pasv.html (Patch, Third Party Advisory)
- github.com/python/cpython/commit/0ab152c6b5d95caa2dc1a30fa96e10258b5f188e (Patch, Third Party Advisory)
- security-tracker.debian.org/tracker/CVE-2021-4189 (Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- access.redhat.com/security/cve/CVE-2021-4189 (Third Party Advisory)
- security.netapp.com/advisory/ntap-20221104-0004/ (Third Party Advisory)
- lists.debian.org/debian-lts-announce/2023/05/msg00024.html (mailing-list)
- lists.debian.org/debian-lts-announce/2023/06/msg00039.html (mailing-list)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2021-4189?
- CVE-2021-4189 is a medium-severity vulnerability in NetApp Ontap Select Deploy Administration Utility, classified under CWE-252. CVSS score: 5.3/10. Published 2022-08-24.
- How severe is CVE-2021-4189?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2021-4189 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.