CVE-2024-24791

Name of the Vulnerable Software and Affected Versions Go versions prior to 1.22.5

Description 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.

Recommendations Update to Go version 1.22.5 or later to resolve the issue. As a temporary workaround, consider restricting access to the net/http/httputil.ReverseProxy proxy to minimize the risk of exploitation.