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NTAP-20210708-0006 — CVE-2021-23017 NGINX Vulnerability in NetApp Products

Published 2021-07-08 · Updated 2024-03-07 · Status: Final · Exploitation: Public · Severity: HIGH 7.7 · ONTAP affected: Yes

Official advisory: NTAP-20210708-0006 on security.netapp.com ↗. Affected versions, fixed releases, and workarounds live there — this page is a summary.

Product family: Cloud Backup / AltaVault / SteelStore · ONTAP | ONTAP-relevant | highest CVSS: 7.7

CVEs in this advisory

CVE-2021-23017 — HIGH · CVSS 7.7 · site index

What the CVE records say

CVE-2021-23017 — A security issue in nginx resolver was identified, which might allow an attacker who is able to forge UDP packets from the DNS server to cause 1-byte memory overwrite, resulting in worker process crash or potential other impact.

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

NetApp Cloud Backup (formerly AltaVault)
NetApp Cloud Backup OST Plug-in (formerly AltaVault OST Plug-in)
ONTAP Select Deploy administration utility

Official fixes

ONTAP Select Deploy administration utility — vendor fix ↗

References

https://mailman.nginx.org/pipermail/nginx-announce/2021/000300.html ↗

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.