The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.

The default configuration of Avaya Secure Access Link (SAL) Gateway 1.5, 1.8, and 2.0 contains certain domain names in the Secondary Core Server URL and Secondary Remote Server URL fields, which allows remote attackers to obtain sensitive information by leveraging administrative access to these domain names, as demonstrated by alarm and log information.