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NTAP-20190703-0001 — CVE-2018-20843 Expat Vulnerability in NetApp Products
Published 2019-07-03 · Updated 2022-01-06 · Status: Final · Exploitation: Public · Severity: HIGH 7.5 · ONTAP affected: Yes
Official advisory: NTAP-20190703-0001 on security.netapp.com ↗. Affected versions, fixed releases, and workarounds live there — this page is a summary.
Product family: Other NetApp products · Active IQ Unified Manager · Cloud Backup / AltaVault / SteelStore · SolidFire / NetApp HCI · ONTAP · OnCommand family | ONTAP-relevant | highest CVSS: 7.5
CVEs in this advisory
- CVE-2018-20843 — HIGH · CVSS 7.5 · site index
What the CVE records say
CVE-2018-20843 — In libexpat in Expat before 2.2.7, XML input including XML names that contain a large number of colons could make the XML parser consume a high amount of RAM and CPU resources while processing (enough to be usable for denial-of-service attacks).
Impact
Successful exploitation of this vulnerability could lead to Denial of Service (DoS).
Affected products
- 7-Mode Transition Tool
- Active IQ Unified Manager for VMware vSphere
- NetApp Cloud Backup (formerly AltaVault)
- NetApp HCI Baseboard Management Controller (BMC) - H610C
- NetApp HCI Baseboard Management Controller (BMC) - H610S
- NetApp HCI Baseboard Management Controller (BMC) - H615C
- NetApp SolidFire Baseboard Management Controller (BMC)
- NetApp SteelStore Cloud Integrated Storage
- NetApp VASA Provider for Clustered Data ONTAP 9.7 and above
- OnCommand Workflow Automation
- Storage Replication Adapter for Clustered Data ONTAP for VMware vSphere 9.7 and above
- Virtual Storage Console for VMware vSphere 9.7 and above
Official fixes
- 7-Mode Transition Tool — vendor fix ↗
- NetApp HCI Baseboard Management Controller (BMC) - H615C — vendor fix ↗
- NetApp HCI Baseboard Management Controller (BMC) - H615C — vendor fix ↗
- NetApp HCI Baseboard Management Controller (BMC) - H615C — vendor fix ↗
- Storage Replication Adapter for Clustered Data ONTAP for VMware vSphere 9.7 and above — vendor fix ↗
- Virtual Storage Console for VMware vSphere 9.7 and above — vendor fix ↗
- NetApp VASA Provider for Clustered Data ONTAP 9.7 and above — vendor fix ↗
- NetApp HCI Baseboard Management Controller (BMC) - H610C — vendor fix ↗
- NetApp HCI Baseboard Management Controller (BMC) - H610C — vendor fix ↗
- NetApp HCI Baseboard Management Controller (BMC) - H610C — vendor fix ↗
- OnCommand Workflow Automation — vendor fix ↗
- Active IQ Unified Manager for VMware vSphere — 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 2019