Issue
A flaw was found in handling multiplexed streams in the HTTP/2 protocol. A client can repeatedly make a request for a new multiplex stream and immediately send an RST_STREAM frame to cancel it. This creates extra work for the server setting up and tearing down the streams while not hitting any server-side limit for the maximum number of active streams per connection, resulting in a denial of service due to server resource consumption(CVE-2023-44487 from Redhat). All versions 2.13 and higher with HTTP/2 enabled are affected: 2.13, 3.0, 4.0, and 5.0.
Product Line
EcoStruxure Building Operation
Environment
- Building Operation Enterprise Server
- Building Operation Enterprise Central
- Building Operation Workstation
- Building Operation Webstation
- SmartX AS-P Server
- SmartX AS-B Server
Cause
HTTP vulnerability raised security concerns for EBO
Resolution
EBO isn't affected by the impacted protocol since EBO doesn't utilize HTTP 2.0 and 3.0.
