Description
A flaw was found in mod_cluster's AdvertiseListenerImpl (org.jboss.modcluster core module). A single crafted UDP multicast datagram with a valid HTTP status line and a "Server:" header but without the "Date:", "Digest:", and "Sequence:" headers triggers a NullPointerException in verifyDigest() that is not caught by the worker thread's exception handler. This causes the advertise listener thread to terminate permanently. The failure is silent (isListening() continues to return true) and persists until the node is restarted. The crash occurs before the AdvertiseSecurityKey comparison, so deployments with a configured security key are still affected.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Red Hat Red Hat JBoss Enterprise Application Platform 7
Default version status: affected
Red Hat Red Hat JBoss Enterprise Application Platform 8
Default version status: affected
Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack
Default version status: affected
Red Hat Red Hat JBoss Web Server 5
Default version status: unknown
Red Hat Red Hat JBoss Web Server 6
Default version status: affected
Red Hat Red Hat JBoss Web Server 7
Default version status: affected
Red Hat Red Hat Single Sign-On 7
Default version status: affected