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NTAP-20211022-0002 — CVE-2021-20305 Nettle Vulnerability in NetApp Products

Published 2021-10-22 · Updated 2024-05-01 · Status: Final · Exploitation: Public · Severity: HIGH 8.1 · ONTAP affected: Yes

Official advisory: NTAP-20211022-0002 on security.netapp.com ↗. Affected versions, fixed releases, and workarounds live there — this page is a summary.

Product family: Active IQ Unified Manager · ONTAP | ONTAP-relevant | highest CVSS: 8.1

CVEs in this advisory

CVE-2021-20305 — HIGH · CVSS 8.1 · site index

What the CVE records say

CVE-2021-20305 — A flaw was found in Nettle in versions before 3.7.2, where several Nettle signature verification functions (GOST DSA, EDDSA & ECDSA) result in the Elliptic Curve Cryptography point (ECC) multiply function being called with out-of-range scalers, possibly resulting in incorrect results. This flaw allows an attacker to force an invalid signature, causing an assertion failure or possible validation. The highest threat to this vulnerability is to confidentiality, integrity, as well as system availability.

Impact

Successful exploitation of this vulnerability could lead to disclosure of sensitive information, addition or modification of data, or Denial of Service (DoS).

Affected products

Active IQ Unified Manager for VMware vSphere
ONTAP Select Deploy administration utility

Official fixes

Active IQ Unified Manager for VMware vSphere — vendor fix ↗
ONTAP Select Deploy administration utility — vendor fix ↗

What to do

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.
If affected and a fixed release exists, plan the upgrade — see the ONTAP upgrade runbook.
If exploitation is listed as "active", treat remediation as urgent and review exposure (management LIFs, ONTAP S3, SnapMirror endpoints).
Harden in parallel: security hardening baseline and ransomware protection on ONTAP.