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NTAP-20200522-0002 — May 2020 ISC BIND Vulnerabilities in NetApp Products

Published 2020-05-22 · Updated 2025-05-15 · Status: Final · Exploitation: Public · Severity: HIGH 8.6 · ONTAP affected: Yes

Official advisory: NTAP-20200522-0002 on security.netapp.com ↗. Affected versions, fixed releases, and workarounds live there — this page is a summary.

Product family: SolidFire / NetApp HCI · Cloud Backup / AltaVault / SteelStore · ONTAP | ONTAP-relevant | highest CVSS: 8.6

CVEs in this advisory

CVE-2020-8616 — HIGH · CVSS 8.6 · site index
CVE-2020-8617 — HIGH · CVSS 7.5 · site index

What the CVE records say

CVE-2020-8616 — A malicious actor who intentionally exploits this lack of effective limitation on the number of fetches performed when processing referrals can, through the use of specially crafted referrals, cause a recursing server to issue a very large number of fetches in an attempt to process the referral. This has at least two potential effects: The performance of the recursing server can potentially be degraded by the additional work required to perform these fetches, and The attacker can exploit this behavior to use the recursing server as a reflector in a reflection attack with a high amplification factor.

CVE-2020-8617 — Using a specially-crafted message, an attacker may potentially cause a BIND server to reach an inconsistent state if the attacker knows (or successfully guesses) the name of a TSIG key used by the server. Since BIND, by default, configures a local session key even on servers whose configuration does not otherwise make use of it, almost all current BIND servers are vulnerable. In releases of BIND dating from March 2018 and after, an assertion check in tsig.c detects this inconsistent state and deliberately exits. Prior to the introduction of the check the server would continue operating in an inconsistent state, with potentially harmful results.

Impact

Successful exploitation of these vulnerabilities could lead to Denial of Service (DoS).

Affected products

NetApp HCI Baseboard Management Controller (BMC) - H410C
NetApp SteelStore Cloud Integrated Storage
Storage Replication Adapter for Clustered Data ONTAP for Windows 7.2 and above

References

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.