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NTAP-20191210-0002 — December 2019 Samba Vulnerabilities in NetApp Products

Published 2019-12-10 · Updated 2019-12-10 · Status: Final · Exploitation: Not public · Severity: MEDIUM 5.4 · ONTAP affected: No — other NetApp product

Official advisory: NTAP-20191210-0002 on security.netapp.com ↗. Affected versions, fixed releases, and workarounds live there — this page is a summary.

Product family: StorageGRID | other NetApp product | highest CVSS: 5.4

CVEs in this advisory

CVE-2019-14861 · site index
CVE-2019-14870 — MEDIUM · CVSS 5.4 · site index

What the CVE records say

CVE-2019-14870 — All Samba versions 4.x.x before 4.9.17, 4.10.x before 4.10.11 and 4.11.x before 4.11.3 have an issue, where the S4U (MS-SFU) Kerberos delegation model includes a feature allowing for a subset of clients to be opted out of constrained delegation in any way, either S4U2Self or regular Kerberos authentication, by forcing all tickets for these clients to be non-forwardable. In AD this is implemented by a user attribute delegation_not_allowed (aka not-delegated), which translates to disallow-forwardable. However the Samba AD DC does not do that for S4U2Self and does set the forwardable flag even if the impersonated client has the not-delegated flag set.

Impact

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

Affected products

StorageGRID (formerly StorageGRID Webscale)
StorageGRID Webscale NAS Bridge
StorageGRID9 (9.x and prior)

References

What to do

Compare your installed product and version against the affected list above and the official advisory's affected-versions table.
Apply the fixed release named in the official advisory, or the documented workaround if no fix ships yet.
Limit management-plane exposure (BMC/management interfaces, web UIs, SNMP) until patched.
Track follow-ups in the site CVE index and the security RSS feed.