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.
[
{
"cpes": [
"cpe:2.3:a:go_standard_library:net\\/http:1.21.12:*:*:*:*:*:*:*"
],
"vendor": "go_standard_library",
"product": "net\\/http",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "1.21.12",
"versionType": "custom"
},
{
"status": "affected",
"version": "1.22.0-0",
"lessThan": "1.22.5",
"versionType": "custom"
}
],
"defaultStatus": "unknown"
}
]