CVE-2023-39325 – HTTP/2 rapid reset can cause excessive work in net/http

https://notcve.org/view.php?id=CVE-2023-39325

A malicious HTTP/2 client which rapidly creates requests and immediately resets them can cause excessive server resource consumption. While the total number of requests is bounded by the http2.Server.MaxConcurrentStreams setting, resetting an in-progress request allows the attacker to create a new request while the existing one is still executing. With the fix applied, HTTP/2 servers now bound the number of simultaneously executing handler goroutines to the stream concurrency limit (MaxConcurrentStreams). New requests arriving when at the limit (which can only happen after the client has reset an existing, in-flight request) will be queued until a handler exits. If the request queue grows too large, the server will terminate the connection. • https://go.dev/cl/534215 https://go.dev/cl/534235 https://go.dev/issue/63417 https://groups.google.com/g/golang-announce/c/iNNxDTCjZvo/m/UDd7VKQuAAAJ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3OVW5V2DM5K5IC3H7O42YDUGNJ74J35O https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3SZN67IL7HMGMNAVLOTIXLIHUDXZK4LH https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3WJ4QVX2AMUJ2F2S27POOAHRC4K3CHU4 https: • CWE-400: Uncontrolled Resource Consumption CWE-770: Allocation of Resources Without Limits or Throttling •