The net/http HTTP/1.1 client mishandled the case where a server responds to a request with an Expect: 100-continue header with a non-informational (200 or higher) status. This mishandling could leave a client connection in an invalid state, where the next request sent on the connection will fail. An attacker sending a request to a net/http/httputil.ReverseProxy proxy can exploit this mishandling to cause a denial of service by sending Expect: 100-continue requests which elicit a non-informational response from the backend. Each such request leaves the proxy with an invalid connection, and causes one subsequent request using that connection to fail.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Golang-1.20 | Ubuntu | mantic | * |
| Golang-1.21 | Ubuntu | mantic | * |
| Golang-1.22 | Ubuntu | mantic | * |