VMware NSX 4.2.1: Rule Matching Issues with vDefend Gateway Firewall

VMware NSX

2 more products

25230

08 August 2025

07 December 2024

Dear Broadcom Customer:

The purpose of this Critical Alert is to inform you of a potential problem that has been recently identified with VMware NSX 4.2.1.  Please read the information provided below and follow the instructions in order to avoid being impacted by this problem.   

PRODUCT(S) AFFECTED: VMware NSX 4.2.1 and 4.2.1.1

PROBLEM DESCRIPTION

Incorrect gateway firewall rule matched in certain configurations

SYMPTOMS:

Traffic passing through vDefend Gateway Firewall may hit an incorrect firewall rule. Depending on the rule hit, traffic may pass through or get dropped.

IMPACTIrrespective of the configured rule, traffic is incorrectly allowed or dropped.

WORKAROUNDNone. Refer to KB Article 382935 for more details

PROBLEM RESOLUTION:

 

This issue is resolved in NSX 4.2.1.2 and later releases. 


 
Thank you,

Broadcom Support Team