ESB-2017.2018 - [Appliance][Virtual] VMware NSX-V Edge: Denial of service - Existing account 2017-08-14

Printable version
PGP/GPG verifiable version

Hash: SHA256

             AUSCERT External Security Bulletin Redistribution

          VMware NSX-V Edge updates address OSPF Protocol LSA DoS
                              14 August 2017


        AusCERT Security Bulletin Summary

Product:           VMware NSX-V Edge
Publisher:         VMWare
Operating System:  Virtualisation
                   Network Appliance
Impact/Access:     Denial of Service -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-4920  

Original Bulletin:

- --------------------------BEGIN INCLUDED TEXT--------------------

- - -----------------------------------------------------------------------
                           VMware Security Advisory

Advisory ID: VMSA-2017-0014
Severity:    Important
Synopsis:    VMware NSX-V Edge updates address OSPF Protocol LSA DoS
Issue date:  2017-08-10
Updated on:  2017-08-10 (Initial Advisory)
CVE number:  CVE-2017-4920

1. Summary

   VMware NSX-V Edge updates address OSPF Protocol LSA Denial of

2. Relevant Products

   VMware NSX-V Edge

3. Problem Description

   a. VMware NSX-V Edge OSPF Protocol LSA Denial of Service

   VMware NSX-V implementation of the OSPF protocol doesn=92t correctly
   handle the link-state advertisement (LSA). A rogue LSA may exploit
   this issue resulting in continuous sending of LSAs between two
   routers eventually going in loop or loss of connectivity.

   Note: The issue cannot be exploited in case the OSPF protocol is not
   configured. At setup time, no particular protocol is configured. For
   more information on static and dynamic routing for NSX Edge refer to
   the NSX Administration Guide, section Logical Router.

   VMware would like to thank Adi Sosnovich, Orna Grumberg and Gabi
   Nakibly for reporting this issue to us.

   The Common Vulnerabilities and Exposures project ( has
   assigned the identifier CVE-2017-4920 to this issue.

   Column 5 of the following table lists the action required to
   remediate the vulnerability in each release, if a solution is

   VMware          Product Running            Replace with/  Mitigation/
   Product         Version on      Severity   Apply patch    Workaround

   NSX-V Edge      6.3.x   any     Important  6.3.3          N/A
   NSX-V Edge      6.2.x   any     Important  6.2.8          N/A

4. Solution

   Please review the patch/release notes for your product and version
   and verify the checksum of your downloaded file.

   VMware NSX-V

5. References

   NSX Administration Guide, section Logical Router.

- - ---------------------------------------------------------------------

6. Change log

   2017-08-10 VMSA-2017-0014
   Initial security advisory in conjunction with the release of
   NSX-V 6.3.3 on 2017-08-10.

- - ----------------------------------------------------------------------

7. Contact

   E-mail list for product security notifications and announcements:

   This Security Advisory is posted to the following lists:
   security-announce at
   bugtraq at
   fulldisclosure at

   E-mail: security at
   PGP key at:

   VMware Security Advisories

   Consolidated list of VMware Security Advisories

   VMware Security Response Policy

   VMware Lifecycle Support Phases

   VMware Security & Compliance Blog


   Copyright 2017 VMware Inc.  All rights reserved.

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

Australian Computer Emergency Response Team
The University of Queensland
Qld 4072

Internet Email:
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.


« Back to bulletins