{
    "CVE_data_meta": {
        "AKA": "HTTP/2 Empty Frame Flooding",
        "ASSIGNER": "cert@cert.org",
        "ID": "CVE-2019-9518",
        "STATE": "PUBLIC",
        "TITLE": "Some HTTP/2 implementations are vulnerable to a flood of empty frames, potentially leading to a denial of service"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "n/a",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "n/a"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "n/a"
                }
            ]
        }
    },
    "credit": [
        {
            "lang": "eng",
            "value": "Thanks to Piotr Sikora of Google for reporting this vulnerability."
        }
    ],
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "Some HTTP/2 implementations are vulnerable to a flood of empty frames, potentially leading to a denial of service. The attacker sends a stream of frames with an empty payload and without the end-of-stream flag. These frames can be DATA, HEADERS, CONTINUATION and/or PUSH_PROMISE. The peer spends time processing each frame disproportionate to attack bandwidth. This can consume excess CPU."
            }
        ]
    },
    "generator": {
        "engine": "Vulnogram 0.0.7"
    },
    "impact": {
        "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.0"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-400 Uncontrolled Resource Consumption"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "VU#605641",
                "refsource": "CERT-VN",
                "url": "https://kb.cert.org/vuls/id/605641/"
            },
            {
                "name": "https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.md",
                "refsource": "MISC",
                "url": "https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.md"
            },
            {
                "refsource": "BUGTRAQ",
                "name": "20190814 APPLE-SA-2019-08-13-5 SwiftNIO HTTP/2 1.5.0",
                "url": "https://seclists.org/bugtraq/2019/Aug/24"
            },
            {
                "refsource": "FULLDISC",
                "name": "20190816 APPLE-SA-2019-08-13-5 SwiftNIO HTTP/2 1.5.0",
                "url": "http://seclists.org/fulldisclosure/2019/Aug/16"
            },
            {
                "refsource": "CONFIRM",
                "name": "https://www.synology.com/security/advisory/Synology_SA_19_33",
                "url": "https://www.synology.com/security/advisory/Synology_SA_19_33"
            },
            {
                "refsource": "CONFIRM",
                "name": "https://support.f5.com/csp/article/K46011592",
                "url": "https://support.f5.com/csp/article/K46011592"
            },
            {
                "refsource": "MLIST",
                "name": "[trafficserver-announce] 20190820 ATS is vulnerable to a HTTP/2 attack with empty frames",
                "url": "https://lists.apache.org/thread.html/2653c56545573b528f3f6352a29eccaf498bd6fb2a6a59568d81a61d@%3Cannounce.trafficserver.apache.org%3E"
            },
            {
                "refsource": "MLIST",
                "name": "[trafficserver-users] 20190820 ATS is vulnerable to a HTTP/2 attack with empty frames",
                "url": "https://lists.apache.org/thread.html/091b518265bce56a16af87b77c8cfacda902a02079e866f9fdf13b61@%3Cusers.trafficserver.apache.org%3E"
            },
            {
                "refsource": "MLIST",
                "name": "[trafficserver-dev] 20190820 ATS is vulnerable to a HTTP/2 attack with empty frames",
                "url": "https://lists.apache.org/thread.html/ff5b0821a6985159a832ff6d1a4bd311ac07ecc7db1e2d8bab619107@%3Cdev.trafficserver.apache.org%3E"
            },
            {
                "refsource": "CONFIRM",
                "name": "https://security.netapp.com/advisory/ntap-20190823-0005/",
                "url": "https://security.netapp.com/advisory/ntap-20190823-0005/"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2019-5a6a7bc12c",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CMNFX5MNYRWWIMO4BTKYQCGUDMHO3AXP/"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2019-6a2980de56",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4ZQGHE3WTYLYAYJEIDJVF2FIGQTAYPMC/"
            },
            {
                "refsource": "DEBIAN",
                "name": "DSA-4520",
                "url": "https://www.debian.org/security/2019/dsa-4520"
            },
            {
                "refsource": "BUGTRAQ",
                "name": "20190910 [SECURITY] [DSA 4520-1] trafficserver security update",
                "url": "https://seclists.org/bugtraq/2019/Sep/18"
            },
            {
                "refsource": "SUSE",
                "name": "openSUSE-SU-2019:2114",
                "url": "http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00032.html"
            },
            {
                "refsource": "SUSE",
                "name": "openSUSE-SU-2019:2115",
                "url": "http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00031.html"
            },
            {
                "refsource": "CONFIRM",
                "name": "https://kc.mcafee.com/corporate/index?page=content&id=SB10296",
                "url": "https://kc.mcafee.com/corporate/index?page=content&id=SB10296"
            },
            {
                "refsource": "REDHAT",
                "name": "RHSA-2019:2925",
                "url": "https://access.redhat.com/errata/RHSA-2019:2925"
            },
            {
                "refsource": "REDHAT",
                "name": "RHSA-2019:2939",
                "url": "https://access.redhat.com/errata/RHSA-2019:2939"
            },
            {
                "refsource": "REDHAT",
                "name": "RHSA-2019:2955",
                "url": "https://access.redhat.com/errata/RHSA-2019:2955"
            },
            {
                "refsource": "CONFIRM",
                "name": "https://support.f5.com/csp/article/K46011592?utm_source=f5support&utm_medium=RSS",
                "url": "https://support.f5.com/csp/article/K46011592?utm_source=f5support&utm_medium=RSS"
            },
            {
                "refsource": "REDHAT",
                "name": "RHSA-2019:3892",
                "url": "https://access.redhat.com/errata/RHSA-2019:3892"
            },
            {
                "refsource": "MLIST",
                "name": "[druid-commits] 20191115 [GitHub] [incubator-druid] ccaominh opened a new pull request #8878: Address security vulnerabilities",
                "url": "https://lists.apache.org/thread.html/9317fd092b257a0815434b116a8af8daea6e920b6673f4fd5583d5fe@%3Ccommits.druid.apache.org%3E"
            },
            {
                "refsource": "REDHAT",
                "name": "RHSA-2019:4352",
                "url": "https://access.redhat.com/errata/RHSA-2019:4352"
            },
            {
                "refsource": "REDHAT",
                "name": "RHSA-2020:0727",
                "url": "https://access.redhat.com/errata/RHSA-2020:0727"
            },
            {
                "refsource": "MLIST",
                "name": "[cassandra-commits] 20210526 [jira] [Created] (CASSANDRA-16698) Security vulnerability CVE-2019-9518 for Netty",
                "url": "https://lists.apache.org/thread.html/r99a625fb17032646d96cd23dec49603ff630e9318e44a686d63046bc@%3Ccommits.cassandra.apache.org%3E"
            },
            {
                "refsource": "MLIST",
                "name": "[cassandra-commits] 20210526 [jira] [Updated] (CASSANDRA-16698) Security vulnerability CVE-2019-9518 for Netty",
                "url": "https://lists.apache.org/thread.html/rd31230d01fa6aad18bdadc0720acd1747e53690bd35f73a48e7a9b75@%3Ccommits.cassandra.apache.org%3E"
            }
        ]
    },
    "source": {
        "discovery": "UNKNOWN"
    }
}