SMBLoris Vulnerability in NetApp Products

circle-check-alt This advisory should be considered the single source of current, up-to-date, authorized and accurate information from NetApp.

Summary

Multiple NetApp products implement the SMB protocol. Systems that implement the SMB protocol can be susceptible to a remote unauthenticated attack referred to as SMBLoris that can cause a system to allocate large amounts of memory and lead to a Denial of Service (DoS) condition.

Impact

Successful exploitation of this vulnerability may lead to a Denial of Service (DoS) condition.

Vulnerability Scoring Details

CVE Score Vector
7.5 (HIGH) CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation and Public Announcements

NetApp is aware of public discussion of this vulnerability.

References

Affected Products

  • NetApp Cloud Backup (formerly AltaVault)
  • StorageGRID
  • StorageGRID Webscale

Products Not Affected

  • 7-Mode Transition Tool
  • ATTO FibreBridge
  • AutoSupport, MySupport,support.netapp.com
  • Brocade Fabric Operating System Firmware
  • Brocade Network Advisor Software
  • Brocade Network Operating System Firmware
  • Cloud Control
  • Cluster Network Switch (NetApp CN1610)
  • Clustered Data ONTAP
  • Clustered Data ONTAP Antivirus Connector
  • Data ONTAP Edge
  • Data ONTAP operating in 7-Mode
  • E-Series SANtricity Management Plug-ins (VMware vCenter)
  • E-Series SANtricity OS Controller Software 11.30 and later
  • E-Series SANtricity OS Controller Software 8.x
  • E-Series SANtricity Storage Manager
  • E-Series SANtricity Web Services (REST API) for Web Services Proxy
  • FAS/AFF System Firmware
  • Host Utilities - SAN for ESX
  • Host Utilities - SAN for Unix and Linux
  • Host Utilities - SAN for Windows
  • MetroCluster Tiebreaker for clustered Data ONTAP
  • Multipath I/O (Data ONTAP DSM for Windows MPIO)
  • NetApp Cloud Backup OST Plug-in (formerly AltaVault OST Plug-in)
  • NetApp Converged Systems Advisor
  • NetApp HCI Compute Nodes
  • NetApp Host Agent
  • NetApp Manageability SDK
  • NetApp NFS Plug-in for VMware VAAI
  • NetApp Plug-in for Symantec NetBackup
  • NetApp SANtricity SMI-S Provider
  • NetApp SMI-S Provider
  • NetApp Service Level Manager
  • NetApp Storage Encryption
  • NetApp VASA Provider for Clustered Data ONTAP 7.0 and above
  • ONTAP Select Deploy administration utility
  • OnCommand API Services
  • OnCommand Cloud Manager
  • OnCommand Insight
  • OnCommand Plug-in for Microsoft
  • OnCommand System Manager
  • OnCommand Unified Manager for 7-Mode (core package)
  • OnCommand Unified Manager for Linux 7.3 and above
  • OnCommand Unified Manager for VMware vSphere 7.3 and above
  • OnCommand Unified Manager for Windows 7.3 and above
  • OnCommand Workflow Automation
  • Open Systems SnapVault Agent
  • Perfstat
  • RAID Controller CTS2600 Legacy Engenio
  • Service Processor
  • Single Mailbox Recovery
  • Snap Creator Framework
  • SnapCenter Server
  • SnapDrive for Unix
  • SnapDrive for Windows
  • SnapManager for Exchange
  • SnapManager for Hyper-V
  • SnapManager for MS SQL
  • SnapManager for Oracle
  • SnapManager for SAP
  • SnapManager for Sharepoint
  • SnapProtect
  • SolidFire Element OS
  • Storage Automation Store
  • Storage Replication Adapter for Clustered Data ONTAP for VMware vSphere 4.x and above
  • Storage Services Connector
  • System Setup
  • Virtual Storage Console for VMware vSphere 7.0 and above

Software Versions and Fixes

NetApp's currently available patches are listed below.


Workarounds

For Samba products the smb.conf file can be edited to modify the the max smbd processes value to 1000 from the default (0). There is no need to perform this change on fixed versions of software. Additionally, avoid exposing port 445 to untrusted networks.

Obtaining Software Fixes

Software fixes will be made available through the NetApp Support website in the Software Download section.

https://mysupport.netapp.com/NOW/cgi-bin/software/

Customers who do not have access to the Support website should contact Technical Support at the number below to obtain the patches.

Contact Information

Check http://mysupport.netapp.com for further updates.
For questions, contact NetApp at:

Technical Support
mysupport.netapp.com
1 888 4 NETAPP (1 888 463 8277) (U.S. and Canada)
+00 800 44 638277 (EMEA/Europe)
+800 800 80 800 (Asia/Pacific)

Status of This Notice

Final.

This advisory should be considered the single source of current, up-to-date, authorized and accurate information from NetApp.

This advisory is posted at the following link:
https://security.netapp.com/advisory/NTAP-20180213-0001

Revision History

Revision # Date Comments
1.0 20180213 Initial Public Release
2.0 20180521 StorageGRID Webscale added to Software Versions and Fixes
3.0 20180831 StorageGRID moved to Won't Fix status as the posted Workaround is the solution, Final status

This document is provided solely for informational purposes. All information is based upon NetApp’s current knowledge and understanding of the hardware and software products tested by NetApp, and the methodology and assumptions used by NetApp. NetApp is not responsible for any errors or omissions that may be contained herein, and no warranty, representation, or other legal commitment or obligation is being provided by NetApp. © 2017 NetApp, Inc. All rights reserved. No portions of this document may be reproduced without prior written consent of NetApp, Inc.