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NTAP-20210805-0007 — CVE-2021-3541 Libxml2 Vulnerability in NetApp Products
Published 2021-08-05 · Updated 2024-03-07 · Status: Interim · Exploitation: Public · Severity: MEDIUM 6.5 · ONTAP affected: Yes
Official advisory: NTAP-20210805-0007 on security.netapp.com ↗. Affected versions, fixed releases, and workarounds live there — this page is a summary.
Product family: Active IQ Unified Manager · Cloud Backup / AltaVault / SteelStore · SolidFire / NetApp HCI · Other NetApp products · ONTAP · SnapManager / Snap utilities | ONTAP-relevant | highest CVSS: 6.5
CVEs in this advisory
- CVE-2021-3541 — MEDIUM · CVSS 6.5 · site index
What the CVE records say
CVE-2021-3541 — A flaw was found in libxml2. Exponential entity expansion attack its possible bypassing all existing protection mechanisms and leading to denial of service.
Impact
Successful exploitation of this vulnerability could lead to Denial of Service (DoS).
Affected products
- Active IQ Unified Manager for VMware vSphere
- NetApp Cloud Backup (formerly AltaVault)
- NetApp HCI Baseboard Management Controller (BMC) - H300S/H500S/H700S/H410S
- NetApp HCI Baseboard Management Controller (BMC) - H410C
- NetApp Manageability SDK
- NetApp SMI-S Provider
- ONTAP 9 (formerly Clustered Data ONTAP)
- ONTAP Antivirus Connector
- ONTAP Select Deploy administration utility
- SnapDrive for Unix
- SnapManager for Hyper-V
Official fixes
- Active IQ Unified Manager for VMware vSphere — vendor fix ↗
- ONTAP 9 (formerly Clustered Data ONTAP) — vendor fix ↗
- ONTAP 9 (formerly Clustered Data ONTAP) — vendor fix ↗
- ONTAP 9 (formerly Clustered Data ONTAP) — vendor fix ↗
- ONTAP 9 (formerly Clustered Data ONTAP) — vendor fix ↗
- ONTAP 9 (formerly Clustered Data ONTAP) — vendor fix ↗
- ONTAP Antivirus Connector — vendor fix ↗
- NetApp Manageability SDK — vendor fix ↗
- NetApp SMI-S Provider — vendor fix ↗
- ONTAP Select Deploy administration utility — vendor fix ↗
- SnapDrive for Unix — 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.
Related reading
- Common ONTAP problems (FAQ) — plain-language symptoms and fixes
- ONTAP security hardening — baseline lockdown guidance
- Ransomware protection on ONTAP — SnapLock, SnapMirror vaulting, Anomaly Detection
- ONTAP error messages index — EMS/WAFL/NFS/SnapMirror messages
- Every NetApp advisory published in 2021