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NTAP-20221104-0004 — CVE-2021-4189 Python Vulnerability in NetApp Products

Published 2022-11-04 · Updated 2024-04-25 · Status: Final · Exploitation: Public · Severity: MEDIUM 5.3 · ONTAP affected: Yes

Official advisory: NTAP-20221104-0004 on security.netapp.com ↗. Affected versions, fixed releases, and workarounds live there — this page is a summary.

Product family: ONTAP  |  ONTAP-relevant  |  highest CVSS: 5.3

CVEs in this advisory

What the CVE records say

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.

Impact

Successful exploitation of this vulnerability could lead to disclosure of sensitive information. <br><br> ONTAP 9 (formerly Clustered Data ONTAP):<br> Affected versions are 9.8 and 9.9.1.

Affected products

Official fixes

References

What to do

  1. Check the affected products listed above against the official advisory's affected-versions table — that is where the exact ONTAP 9 release, ONTAP tool, or management product versions are named.
  2. If affected and a fixed release exists, plan the upgrade — see the ONTAP upgrade runbook.
  3. If exploitation is listed as "active", treat remediation as urgent and review exposure (management LIFs, ONTAP S3, SnapMirror endpoints).
  4. Harden in parallel: security hardening baseline and ransomware protection on ONTAP.

Related reading

Browse all ONTAP CVEs → · Security hub