VMware NSX-V Edge updates address OSPF Protocol LSA DoS

VMware Security Advisory
VMware Security Advisory Advisory ID:
VMware Security Advisory Severity:
VMware Security Advisory Synopsis:
 VMware NSX-V Edge updates address OSPF Protocol LSA DoS
VMware Security Advisory Issue date:
VMware Security Advisory Updated on:
 2017-08-10 (Initial Advisory)
VMware Security Advisory CVE numbers:
1. Summary

VMware NSX-V Edge updates address OSPF Protocol LSA DoS.

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’t 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 (cve.mitre.org) 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 available.

VMware Product
Product Version
Running on
Replace with/ Apply Patch
Mitigation/ Workaround
VMware Product NSX-V Edge
Product Version 6.3.x
Running on Any
Severity Important
Replace with/ Apply Patch 6.3.3
Mitigation/ Workaround None
VMware Product NSX-V Edge
Product Version 6.2.x
Running on Any
Severity Important
Replace with/ Apply Patch 6.2.8
Mitigation/ Workaround None

4. Solution

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

VMware NSX-V


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


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