CVE-2023-45288 (GCVE-0-2023-45288)

Vulnerability from cvelistv5 – Published: 2024-04-04 20:37 – Updated: 2025-11-04 18:17
VLAI?
Title
HTTP/2 CONTINUATION flood in net/http
Summary
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.
Severity ?
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-400 - Uncontrolled Resource Consumption
Assigner
Go
References
Impacted products
Vendor Product Version
Go standard library net/http Affected: 0 , < 1.21.9 (semver)
Affected: 1.22.0-0 , < 1.22.2 (semver)
Create a notification for this product.
Credits
Bartek Nowotarski (https://nowotarski.info/)
Show details on NVD website
To clipboard 

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              "name": "http2Framer.readMetaFrame"
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            {
              "name": "CanonicalHeaderKey"
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            {
              "name": "Client.CloseIdleConnections"
            },
            {
              "name": "Client.Do"
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            {
              "name": "Client.Get"
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            {
              "name": "Client.Head"
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            {
              "name": "Client.Post"
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              "name": "Client.PostForm"
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              "name": "Cookie.String"
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            {
              "name": "Cookie.Valid"
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              "name": "Dir.Open"
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              "name": "Error"
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            {
              "name": "Get"
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              "name": "HandlerFunc.ServeHTTP"
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            {
              "name": "Head"
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              "name": "Header.Add"
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              "name": "Header.Del"
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              "name": "Header.Get"
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            {
              "name": "Header.Set"
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            {
              "name": "Header.Values"
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            {
              "name": "Header.Write"
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            {
              "name": "Header.WriteSubset"
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            {
              "name": "ListenAndServe"
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            {
              "name": "ListenAndServeTLS"
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            {
              "name": "NewRequest"
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            {
              "name": "NewRequestWithContext"
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              "name": "NotFound"
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            {
              "name": "ParseTime"
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            {
              "name": "Post"
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            {
              "name": "PostForm"
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            {
              "name": "ProxyFromEnvironment"
            },
            {
              "name": "ReadRequest"
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            {
              "name": "ReadResponse"
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            {
              "name": "Redirect"
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            {
              "name": "Request.AddCookie"
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            {
              "name": "Request.BasicAuth"
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            {
              "name": "Request.FormFile"
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            {
              "name": "Request.FormValue"
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            {
              "name": "Request.MultipartReader"
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              "name": "Request.PostFormValue"
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              "name": "Response.Location"
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              "name": "Response.Write"
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              "name": "ResponseController.EnableFullDuplex"
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              "name": "ResponseController.Flush"
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              "name": "Server.Serve"
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              "name": "bodyEOFSignal.Read"
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              "name": "bodyLocked.Read"
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              "name": "bufioFlushWriter.Write"
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              "name": "http2Framer.WritePing"
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              "name": "http2Framer.WritePushPromise"
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              "name": "http2Framer.WriteRSTStream"
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              "name": "http2Framer.WriteRawFrame"
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              "name": "http2Framer.WriteSettings"
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              "name": "http2Framer.WriteWindowUpdate"
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              "name": "http2GoAwayError.Error"
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              "name": "http2Server.ServeConn"
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              "name": "http2Setting.String"
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              "name": "http2SettingsFrame.ForeachSetting"
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              "name": "http2StreamError.Error"
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              "name": "http2Transport.NewClientConn"
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              "name": "http2Transport.RoundTrip"
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              "name": "http2responseWriter.Push"
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              "name": "http2responseWriter.SetReadDeadline"
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              "name": "http2responseWriter.SetWriteDeadline"
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              "name": "http2responseWriter.Write"
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              "name": "http2responseWriter.WriteHeader"
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            {
              "name": "http2serverConn.CloseConn"
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            {
              "name": "http2serverConn.Flush"
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            {
              "name": "http2stickyErrWriter.Write"
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            {
              "name": "http2transportResponseBody.Read"
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            {
              "name": "http2writeData.String"
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            {
              "name": "initALPNRequest.ServeHTTP"
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            {
              "name": "loggingConn.Close"
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            {
              "name": "loggingConn.Read"
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            {
              "name": "loggingConn.Write"
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            {
              "name": "maxBytesReader.Close"
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            {
              "name": "maxBytesReader.Read"
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            {
              "name": "onceCloseListener.Close"
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              "name": "persistConn.Read"
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              "name": "persistConnWriter.ReadFrom"
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            {
              "name": "persistConnWriter.Write"
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              "name": "populateResponse.Write"
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              "name": "populateResponse.WriteHeader"
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            {
              "name": "readTrackingBody.Close"
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            {
              "name": "readTrackingBody.Read"
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            {
              "name": "readWriteCloserBody.Read"
            },
            {
              "name": "redirectHandler.ServeHTTP"
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            {
              "name": "response.Flush"
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            {
              "name": "response.FlushError"
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            {
              "name": "response.Hijack"
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            {
              "name": "response.ReadFrom"
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            {
              "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"
            }
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              "name": "ClientConn.Close"
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              "name": "ClientConn.Ping"
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            {
              "name": "ClientConn.RoundTrip"
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              "name": "ClientConn.Shutdown"
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              "name": "ConfigureTransport"
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            {
              "name": "ConfigureTransports"
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              "name": "ConnectionError.Error"
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            {
              "name": "ErrCode.String"
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            {
              "name": "FrameHeader.String"
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            {
              "name": "FrameType.String"
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            {
              "name": "FrameWriteRequest.String"
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            {
              "name": "Framer.ReadFrame"
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            {
              "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"
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            {
              "name": "Setting.String"
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            {
              "name": "SettingID.String"
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            {
              "name": "SettingsFrame.ForeachSetting"
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            {
              "name": "StreamError.Error"
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            {
              "name": "Transport.CloseIdleConnections"
            },
            {
              "name": "Transport.NewClientConn"
            },
            {
              "name": "Transport.RoundTrip"
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            {
              "name": "Transport.RoundTripOpt"
            },
            {
              "name": "bufferedWriter.Flush"
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            {
              "name": "bufferedWriter.Write"
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            {
              "name": "chunkWriter.Write"
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            {
              "name": "clientConnPool.GetClientConn"
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            {
              "name": "connError.Error"
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            {
              "name": "dataBuffer.Read"
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            {
              "name": "duplicatePseudoHeaderError.Error"
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            {
              "name": "gzipReader.Close"
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            {
              "name": "gzipReader.Read"
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            {
              "name": "headerFieldNameError.Error"
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            {
              "name": "headerFieldValueError.Error"
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            {
              "name": "noDialClientConnPool.GetClientConn"
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            {
              "name": "noDialH2RoundTripper.RoundTrip"
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            {
              "name": "pipe.Read"
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              "name": "priorityWriteScheduler.CloseStream"
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            {
              "name": "priorityWriteScheduler.OpenStream"
            },
            {
              "name": "pseudoHeaderError.Error"
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            {
              "name": "requestBody.Close"
            },
            {
              "name": "requestBody.Read"
            },
            {
              "name": "responseWriter.Flush"
            },
            {
              "name": "responseWriter.FlushError"
            },
            {
              "name": "responseWriter.Push"
            },
            {
              "name": "responseWriter.SetReadDeadline"
            },
            {
              "name": "responseWriter.SetWriteDeadline"
            },
            {
              "name": "responseWriter.Write"
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            {
              "name": "responseWriter.WriteHeader"
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            {
              "name": "responseWriter.WriteString"
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            {
              "name": "roundRobinWriteScheduler.OpenStream"
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            {
              "name": "serverConn.CloseConn"
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            {
              "name": "serverConn.Flush"
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            {
              "name": "stickyErrWriter.Write"
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            {
              "name": "transportResponseBody.Close"
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              "name": "transportResponseBody.Read"
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            {
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        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
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        },
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        },
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        },
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        },
        {
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        },
        {
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        },
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          "url": "http://www.openwall.com/lists/oss-security/2024/04/05/4"
        },
        {
          "url": "http://www.openwall.com/lists/oss-security/2024/04/03/16"
        }
      ],
      "title": "HTTP/2 CONTINUATION flood in net/http"
    }
  },
  "cveMetadata": {
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    "dateReserved": "2023-10-06T17:06:26.221Z",
    "dateUpdated": "2025-11-04T18:17:43.583Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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\"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\": 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\"https://go.dev/issue/65051\"}, {\"url\": \"https://go.dev/cl/576155\"}, {\"url\": \"https://groups.google.com/g/golang-announce/c/YgW0sx8mN3M\"}, {\"url\": \"https://pkg.go.dev/vuln/GO-2024-2687\"}, {\"url\": \"https://security.netapp.com/advisory/ntap-20240419-0009/\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QRYFHIQ6XRKRYBI2F5UESH67BJBQXUPT/\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/04/05/4\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/04/03/16\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"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\u0027s 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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"description\": \"CWE-400: Uncontrolled Resource Consumption\"}]}], \"providerMetadata\": {\"orgId\": \"1bb62c36-49e3-4200-9d77-64a1400537cc\", \"shortName\": \"Go\", \"dateUpdated\": \"2024-05-01T17:10:07.754Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-45288\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-04T18:17:43.583Z\", \"dateReserved\": \"2023-10-06T17:06:26.221Z\", \"assignerOrgId\": \"1bb62c36-49e3-4200-9d77-64a1400537cc\", \"datePublished\": \"2024-04-04T20:37:30.714Z\", \"assignerShortName\": \"Go\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.