Phoenix transports do not limit channel joins per connection, enabling process-exhaustion denial of service

{
                    "collectionURL": "https://repo.hex.pm",
                    "cpes": [
                        "cpe:2.3:a:phoenixframework:phoenix:*:*:*:*:*:*:*:*"
                    ],
                    "defaultStatus": "unaffected",
                    "modules": [
                        "'Elixir.Phoenix.Socket'"
                    ],
                    "packageName": "phoenix",
                    "packageURL": "pkg:hex/phoenix",
                    "product": "phoenix",
                    "programFiles": [
                        "lib/phoenix/socket.ex"
                    ],
                    "programRoutines": [
                        {
                            "name": "'Elixir.Phoenix.Socket':handle_in/4"
                        }
                    ],
                    "repo": "https://github.com/phoenixframework/phoenix",
                    "vendor": "phoenixframework",
                    "versions": [
                        {
                            "lessThan": "1.5.15",
                            "status": "affected",
                            "version": "0.11.0",
                            "versionType": "semver"
                        },
                        {
                            "lessThan": "1.6.17",
                            "status": "affected",
                            "version": "1.6.0-rc.0",
                            "versionType": "semver"
                        },
                        {
                            "lessThan": "1.7.24",
                            "status": "affected",
                            "version": "1.7.0-rc.0",
                            "versionType": "semver"
                        },
                        {
                            "lessThan": "1.8.9",
                            "status": "affected",
                            "version": "1.8.0-rc.0",
                            "versionType": "semver"
                        }
                    ]
                }

{
                    "collectionURL": "https://github.com",
                    "cpes": [
                        "cpe:2.3:a:phoenixframework:phoenix:*:*:*:*:*:*:*:*"
                    ],
                    "defaultStatus": "unaffected",
                    "modules": [
                        "'Elixir.Phoenix.Socket'"
                    ],
                    "packageName": "phoenixframework/phoenix",
                    "packageURL": "pkg:github/phoenixframework/phoenix",
                    "product": "phoenix",
                    "programFiles": [
                        "lib/phoenix/socket.ex"
                    ],
                    "programRoutines": [
                        {
                            "name": "'Elixir.Phoenix.Socket':handle_in/4"
                        }
                    ],
                    "repo": "https://github.com/phoenixframework/phoenix",
                    "vendor": "phoenixframework",
                    "versions": [
                        {
                            "changes": [
                                {
                                    "at": "c498ba8cf49f6accbbd0c643a5340b58db891218",
                                    "status": "unaffected"
                                },
                                {
                                    "at": "d19ca0a8d9f82c130b7ed339b9f033433e2dea5e",
                                    "status": "unaffected"
                                },
                                {
                                    "at": "a612100cd8a4279091abc1a2ef8fb98a6d01c0a1",
                                    "status": "unaffected"
                                },
                                {
                                    "at": "16e295d2fccab185d1292322e2bee5d46c725c8a",
                                    "status": "unaffected"
                                }
                            ],
                            "lessThan": "*",
                            "status": "affected",
                            "version": "14a297e88023cb280a577962a49a0bbdeef9f4eb",
                            "versionType": "git"
                        }
                    ]
                }