CVE-2021-3690: Undertow buffer leak on incoming websocket PONG message may lead to DoS

Solution Verified - Updated

Environment

  • Red Hat Enterprise Application Platform (EAP) 7.3.8
  • Red Hat Enterprise Application Platform (EAP) 7.4.0
  • Red Hat Single Sign-On (RHSSO) 7.4.8

Issue

  • java.lang.OutOfMemoryError: Direct buffer memory in the JBoss server log

Resolution

Upgrade to one of the following releases:

  • EAP 7.3.9
  • EAP 7.4.1
  • RH SSO 7.4.9

As a workaround, consider disabling direct buffer usage in the JBoss IO subsystem:

<subsystem xmlns="urn:jboss:domain:io:3.0">
    <worker name="default"></worker>
    <buffer-pool name="default" direct-buffers="false"></buffer-pool>
</subsystem>

Root Cause

This content is not included.UNDERTOW-1935

SBR
Product(s)

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