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cvelistGoCVELIST:CVE-2023-45288
HistoryApr 04, 2024 - 8:37 p.m.

CVE-2023-45288 HTTP/2 CONTINUATION flood in net/http

2024-04-0420:37:30
Go
www.cve.org
2
http/2
continuation frames
maxheaderbytes
hpack
huffman-encoded
arbitrary data

6.1 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

13.4%

An attacker may cause an HTTP/2 endpoint to read arbitrary amounts of header data by sending an excessive number of CONTINUATION frames. Maintaining HPACK state requires parsing and processing all HEADERS and CONTINUATION frames on a connection. When a request’s headers exceed MaxHeaderBytes, no memory is allocated to store the excess headers, but they are still parsed. This permits an attacker to cause an HTTP/2 endpoint to read arbitrary amounts of header data, all associated with a request which is going to be rejected. These headers can include Huffman-encoded data which is significantly more expensive for the receiver to decode than for an attacker to send. The fix sets a limit on the amount of excess header frames we will process before closing a connection.

CNA Affected

[
  {
    "vendor": "Go standard library",
    "product": "net/http",
    "collectionURL": "https://pkg.go.dev",
    "packageName": "net/http",
    "versions": [
      {
        "version": "0",
        "lessThan": "1.21.9",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "1.22.0-0",
        "lessThan": "1.22.2",
        "status": "affected",
        "versionType": "semver"
      }
    ],
    "programRoutines": [
      {
        "name": "http2Framer.readMetaFrame"
      },
      {
        "name": "CanonicalHeaderKey"
      },
      {
        "name": "Client.CloseIdleConnections"
      },
      {
        "name": "Client.Do"
      },
      {
        "name": "Client.Get"
      },
      {
        "name": "Client.Head"
      },
      {
        "name": "Client.Post"
      },
      {
        "name": "Client.PostForm"
      },
      {
        "name": "Cookie.String"
      },
      {
        "name": "Cookie.Valid"
      },
      {
        "name": "Dir.Open"
      },
      {
        "name": "Error"
      },
      {
        "name": "Get"
      },
      {
        "name": "HandlerFunc.ServeHTTP"
      },
      {
        "name": "Head"
      },
      {
        "name": "Header.Add"
      },
      {
        "name": "Header.Del"
      },
      {
        "name": "Header.Get"
      },
      {
        "name": "Header.Set"
      },
      {
        "name": "Header.Values"
      },
      {
        "name": "Header.Write"
      },
      {
        "name": "Header.WriteSubset"
      },
      {
        "name": "ListenAndServe"
      },
      {
        "name": "ListenAndServeTLS"
      },
      {
        "name": "NewRequest"
      },
      {
        "name": "NewRequestWithContext"
      },
      {
        "name": "NotFound"
      },
      {
        "name": "ParseTime"
      },
      {
        "name": "Post"
      },
      {
        "name": "PostForm"
      },
      {
        "name": "ProxyFromEnvironment"
      },
      {
        "name": "ReadRequest"
      },
      {
        "name": "ReadResponse"
      },
      {
        "name": "Redirect"
      },
      {
        "name": "Request.AddCookie"
      },
      {
        "name": "Request.BasicAuth"
      },
      {
        "name": "Request.FormFile"
      },
      {
        "name": "Request.FormValue"
      },
      {
        "name": "Request.MultipartReader"
      },
      {
        "name": "Request.ParseForm"
      },
      {
        "name": "Request.ParseMultipartForm"
      },
      {
        "name": "Request.PostFormValue"
      },
      {
        "name": "Request.Referer"
      },
      {
        "name": "Request.SetBasicAuth"
      },
      {
        "name": "Request.UserAgent"
      },
      {
        "name": "Request.Write"
      },
      {
        "name": "Request.WriteProxy"
      },
      {
        "name": "Response.Cookies"
      },
      {
        "name": "Response.Location"
      },
      {
        "name": "Response.Write"
      },
      {
        "name": "ResponseController.EnableFullDuplex"
      },
      {
        "name": "ResponseController.Flush"
      },
      {
        "name": "ResponseController.Hijack"
      },
      {
        "name": "ResponseController.SetReadDeadline"
      },
      {
        "name": "ResponseController.SetWriteDeadline"
      },
      {
        "name": "Serve"
      },
      {
        "name": "ServeContent"
      },
      {
        "name": "ServeFile"
      },
      {
        "name": "ServeMux.ServeHTTP"
      },
      {
        "name": "ServeTLS"
      },
      {
        "name": "Server.Close"
      },
      {
        "name": "Server.ListenAndServe"
      },
      {
        "name": "Server.ListenAndServeTLS"
      },
      {
        "name": "Server.Serve"
      },
      {
        "name": "Server.ServeTLS"
      },
      {
        "name": "Server.SetKeepAlivesEnabled"
      },
      {
        "name": "Server.Shutdown"
      },
      {
        "name": "SetCookie"
      },
      {
        "name": "Transport.CancelRequest"
      },
      {
        "name": "Transport.Clone"
      },
      {
        "name": "Transport.CloseIdleConnections"
      },
      {
        "name": "Transport.RoundTrip"
      },
      {
        "name": "body.Close"
      },
      {
        "name": "body.Read"
      },
      {
        "name": "bodyEOFSignal.Close"
      },
      {
        "name": "bodyEOFSignal.Read"
      },
      {
        "name": "bodyLocked.Read"
      },
      {
        "name": "bufioFlushWriter.Write"
      },
      {
        "name": "cancelTimerBody.Close"
      },
      {
        "name": "cancelTimerBody.Read"
      },
      {
        "name": "checkConnErrorWriter.Write"
      },
      {
        "name": "chunkWriter.Write"
      },
      {
        "name": "connReader.Read"
      },
      {
        "name": "connectMethodKey.String"
      },
      {
        "name": "expectContinueReader.Close"
      },
      {
        "name": "expectContinueReader.Read"
      },
      {
        "name": "extraHeader.Write"
      },
      {
        "name": "fileHandler.ServeHTTP"
      },
      {
        "name": "fileTransport.RoundTrip"
      },
      {
        "name": "globalOptionsHandler.ServeHTTP"
      },
      {
        "name": "gzipReader.Close"
      },
      {
        "name": "gzipReader.Read"
      },
      {
        "name": "http2ClientConn.Close"
      },
      {
        "name": "http2ClientConn.Ping"
      },
      {
        "name": "http2ClientConn.RoundTrip"
      },
      {
        "name": "http2ClientConn.Shutdown"
      },
      {
        "name": "http2ConnectionError.Error"
      },
      {
        "name": "http2ErrCode.String"
      },
      {
        "name": "http2FrameHeader.String"
      },
      {
        "name": "http2FrameType.String"
      },
      {
        "name": "http2FrameWriteRequest.String"
      },
      {
        "name": "http2Framer.ReadFrame"
      },
      {
        "name": "http2Framer.WriteContinuation"
      },
      {
        "name": "http2Framer.WriteData"
      },
      {
        "name": "http2Framer.WriteDataPadded"
      },
      {
        "name": "http2Framer.WriteGoAway"
      },
      {
        "name": "http2Framer.WriteHeaders"
      },
      {
        "name": "http2Framer.WritePing"
      },
      {
        "name": "http2Framer.WritePriority"
      },
      {
        "name": "http2Framer.WritePushPromise"
      },
      {
        "name": "http2Framer.WriteRSTStream"
      },
      {
        "name": "http2Framer.WriteRawFrame"
      },
      {
        "name": "http2Framer.WriteSettings"
      },
      {
        "name": "http2Framer.WriteSettingsAck"
      },
      {
        "name": "http2Framer.WriteWindowUpdate"
      },
      {
        "name": "http2GoAwayError.Error"
      },
      {
        "name": "http2Server.ServeConn"
      },
      {
        "name": "http2Setting.String"
      },
      {
        "name": "http2SettingID.String"
      },
      {
        "name": "http2SettingsFrame.ForeachSetting"
      },
      {
        "name": "http2StreamError.Error"
      },
      {
        "name": "http2Transport.CloseIdleConnections"
      },
      {
        "name": "http2Transport.NewClientConn"
      },
      {
        "name": "http2Transport.RoundTrip"
      },
      {
        "name": "http2Transport.RoundTripOpt"
      },
      {
        "name": "http2bufferedWriter.Flush"
      },
      {
        "name": "http2bufferedWriter.Write"
      },
      {
        "name": "http2chunkWriter.Write"
      },
      {
        "name": "http2clientConnPool.GetClientConn"
      },
      {
        "name": "http2connError.Error"
      },
      {
        "name": "http2dataBuffer.Read"
      },
      {
        "name": "http2duplicatePseudoHeaderError.Error"
      },
      {
        "name": "http2gzipReader.Close"
      },
      {
        "name": "http2gzipReader.Read"
      },
      {
        "name": "http2headerFieldNameError.Error"
      },
      {
        "name": "http2headerFieldValueError.Error"
      },
      {
        "name": "http2noDialClientConnPool.GetClientConn"
      },
      {
        "name": "http2noDialH2RoundTripper.RoundTrip"
      },
      {
        "name": "http2pipe.Read"
      },
      {
        "name": "http2priorityWriteScheduler.CloseStream"
      },
      {
        "name": "http2priorityWriteScheduler.OpenStream"
      },
      {
        "name": "http2pseudoHeaderError.Error"
      },
      {
        "name": "http2requestBody.Close"
      },
      {
        "name": "http2requestBody.Read"
      },
      {
        "name": "http2responseWriter.Flush"
      },
      {
        "name": "http2responseWriter.FlushError"
      },
      {
        "name": "http2responseWriter.Push"
      },
      {
        "name": "http2responseWriter.SetReadDeadline"
      },
      {
        "name": "http2responseWriter.SetWriteDeadline"
      },
      {
        "name": "http2responseWriter.Write"
      },
      {
        "name": "http2responseWriter.WriteHeader"
      },
      {
        "name": "http2responseWriter.WriteString"
      },
      {
        "name": "http2roundRobinWriteScheduler.OpenStream"
      },
      {
        "name": "http2serverConn.CloseConn"
      },
      {
        "name": "http2serverConn.Flush"
      },
      {
        "name": "http2stickyErrWriter.Write"
      },
      {
        "name": "http2transportResponseBody.Close"
      },
      {
        "name": "http2transportResponseBody.Read"
      },
      {
        "name": "http2writeData.String"
      },
      {
        "name": "initALPNRequest.ServeHTTP"
      },
      {
        "name": "loggingConn.Close"
      },
      {
        "name": "loggingConn.Read"
      },
      {
        "name": "loggingConn.Write"
      },
      {
        "name": "maxBytesReader.Close"
      },
      {
        "name": "maxBytesReader.Read"
      },
      {
        "name": "onceCloseListener.Close"
      },
      {
        "name": "persistConn.Read"
      },
      {
        "name": "persistConnWriter.ReadFrom"
      },
      {
        "name": "persistConnWriter.Write"
      },
      {
        "name": "populateResponse.Write"
      },
      {
        "name": "populateResponse.WriteHeader"
      },
      {
        "name": "readTrackingBody.Close"
      },
      {
        "name": "readTrackingBody.Read"
      },
      {
        "name": "readWriteCloserBody.Read"
      },
      {
        "name": "redirectHandler.ServeHTTP"
      },
      {
        "name": "response.Flush"
      },
      {
        "name": "response.FlushError"
      },
      {
        "name": "response.Hijack"
      },
      {
        "name": "response.ReadFrom"
      },
      {
        "name": "response.Write"
      },
      {
        "name": "response.WriteHeader"
      },
      {
        "name": "response.WriteString"
      },
      {
        "name": "serverHandler.ServeHTTP"
      },
      {
        "name": "socksDialer.DialWithConn"
      },
      {
        "name": "socksUsernamePassword.Authenticate"
      },
      {
        "name": "stringWriter.WriteString"
      },
      {
        "name": "timeoutHandler.ServeHTTP"
      },
      {
        "name": "timeoutWriter.Write"
      },
      {
        "name": "timeoutWriter.WriteHeader"
      },
      {
        "name": "transportReadFromServerError.Error"
      }
    ],
    "defaultStatus": "unaffected"
  },
  {
    "vendor": "golang.org/x/net",
    "product": "golang.org/x/net/http2",
    "collectionURL": "https://pkg.go.dev",
    "packageName": "golang.org/x/net/http2",
    "versions": [
      {
        "version": "0",
        "lessThan": "0.23.0",
        "status": "affected",
        "versionType": "semver"
      }
    ],
    "programRoutines": [
      {
        "name": "Framer.readMetaFrame"
      },
      {
        "name": "ClientConn.Close"
      },
      {
        "name": "ClientConn.Ping"
      },
      {
        "name": "ClientConn.RoundTrip"
      },
      {
        "name": "ClientConn.Shutdown"
      },
      {
        "name": "ConfigureServer"
      },
      {
        "name": "ConfigureTransport"
      },
      {
        "name": "ConfigureTransports"
      },
      {
        "name": "ConnectionError.Error"
      },
      {
        "name": "ErrCode.String"
      },
      {
        "name": "FrameHeader.String"
      },
      {
        "name": "FrameType.String"
      },
      {
        "name": "FrameWriteRequest.String"
      },
      {
        "name": "Framer.ReadFrame"
      },
      {
        "name": "Framer.WriteContinuation"
      },
      {
        "name": "Framer.WriteData"
      },
      {
        "name": "Framer.WriteDataPadded"
      },
      {
        "name": "Framer.WriteGoAway"
      },
      {
        "name": "Framer.WriteHeaders"
      },
      {
        "name": "Framer.WritePing"
      },
      {
        "name": "Framer.WritePriority"
      },
      {
        "name": "Framer.WritePushPromise"
      },
      {
        "name": "Framer.WriteRSTStream"
      },
      {
        "name": "Framer.WriteRawFrame"
      },
      {
        "name": "Framer.WriteSettings"
      },
      {
        "name": "Framer.WriteSettingsAck"
      },
      {
        "name": "Framer.WriteWindowUpdate"
      },
      {
        "name": "GoAwayError.Error"
      },
      {
        "name": "ReadFrameHeader"
      },
      {
        "name": "Server.ServeConn"
      },
      {
        "name": "Setting.String"
      },
      {
        "name": "SettingID.String"
      },
      {
        "name": "SettingsFrame.ForeachSetting"
      },
      {
        "name": "StreamError.Error"
      },
      {
        "name": "Transport.CloseIdleConnections"
      },
      {
        "name": "Transport.NewClientConn"
      },
      {
        "name": "Transport.RoundTrip"
      },
      {
        "name": "Transport.RoundTripOpt"
      },
      {
        "name": "bufferedWriter.Flush"
      },
      {
        "name": "bufferedWriter.Write"
      },
      {
        "name": "chunkWriter.Write"
      },
      {
        "name": "clientConnPool.GetClientConn"
      },
      {
        "name": "connError.Error"
      },
      {
        "name": "dataBuffer.Read"
      },
      {
        "name": "duplicatePseudoHeaderError.Error"
      },
      {
        "name": "gzipReader.Close"
      },
      {
        "name": "gzipReader.Read"
      },
      {
        "name": "headerFieldNameError.Error"
      },
      {
        "name": "headerFieldValueError.Error"
      },
      {
        "name": "noDialClientConnPool.GetClientConn"
      },
      {
        "name": "noDialH2RoundTripper.RoundTrip"
      },
      {
        "name": "pipe.Read"
      },
      {
        "name": "priorityWriteScheduler.CloseStream"
      },
      {
        "name": "priorityWriteScheduler.OpenStream"
      },
      {
        "name": "pseudoHeaderError.Error"
      },
      {
        "name": "requestBody.Close"
      },
      {
        "name": "requestBody.Read"
      },
      {
        "name": "responseWriter.Flush"
      },
      {
        "name": "responseWriter.FlushError"
      },
      {
        "name": "responseWriter.Push"
      },
      {
        "name": "responseWriter.SetReadDeadline"
      },
      {
        "name": "responseWriter.SetWriteDeadline"
      },
      {
        "name": "responseWriter.Write"
      },
      {
        "name": "responseWriter.WriteHeader"
      },
      {
        "name": "responseWriter.WriteString"
      },
      {
        "name": "roundRobinWriteScheduler.OpenStream"
      },
      {
        "name": "serverConn.CloseConn"
      },
      {
        "name": "serverConn.Flush"
      },
      {
        "name": "stickyErrWriter.Write"
      },
      {
        "name": "transportResponseBody.Close"
      },
      {
        "name": "transportResponseBody.Read"
      },
      {
        "name": "writeData.String"
      }
    ],
    "defaultStatus": "unaffected"
  }
]