{
    "CVE_data_meta": {
        "AKA": "HTTP/2 Internal Data Buffering",
        "ASSIGNER": "cert@cert.org",
        "ID": "CVE-2019-9517",
        "STATE": "PUBLIC",
        "TITLE": "Some HTTP/2 implementations are vulnerable to unconstrained interal data buffering, 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 Jonathan Looney of Netflix 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 unconstrained interal data buffering, potentially leading to a denial of service. The attacker opens the HTTP/2 window so the peer can send without constraint; however, they leave the TCP window closed so the peer cannot actually write (many of) the bytes on the wire. The attacker then sends a stream of requests for a large response object. Depending on how the servers queue the responses, this can consume excess memory, CPU, or both."
            }
        ]
    },
    "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": "MLIST",
                "name": "[httpd-announce] 20190814 CVE-2019-9517: mod_http2, DoS attack by exhausting h2 workers",
                "url": "https://lists.apache.org/thread.html/4610762456644181b267c846423b3a990bd4aaea1886ecc7d51febdb@%3Cannounce.httpd.apache.org%3E"
            },
            {
                "refsource": "MLIST",
                "name": "[httpd-cvs] 20190815 svn commit: r1048743 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html",
                "url": "https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba@%3Ccvs.httpd.apache.org%3E"
            },
            {
                "refsource": "MLIST",
                "name": "[oss-security] 20190814 CVE-2019-9517: mod_http2, DoS attack by exhausting h2 workers",
                "url": "http://www.openwall.com/lists/oss-security/2019/08/15/7"
            },
            {
                "refsource": "MLIST",
                "name": "[httpd-dev] 20190817 CVE-2019-10097 vs. CHANGEs entry",
                "url": "https://lists.apache.org/thread.html/ec97fdfc1a859266e56fef084353a34e0a0b08901b3c1aa317a43c8c@%3Cdev.httpd.apache.org%3E"
            },
            {
                "refsource": "MLIST",
                "name": "[httpd-dev] 20190817 Re: CVE-2019-10097 vs. CHANGEs entry",
                "url": "https://lists.apache.org/thread.html/d89f999e26dfb1d50f247ead1fe8538014eb412b2dbe5be4b1a9ef50@%3Cdev.httpd.apache.org%3E"
            },
            {
                "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/K02591030",
                "url": "https://support.f5.com/csp/article/K02591030"
            },
            {
                "refsource": "CONFIRM",
                "name": "https://security.netapp.com/advisory/ntap-20190823-0005/",
                "url": "https://security.netapp.com/advisory/ntap-20190823-0005/"
            },
            {
                "refsource": "CONFIRM",
                "name": "https://security.netapp.com/advisory/ntap-20190823-0003/",
                "url": "https://security.netapp.com/advisory/ntap-20190823-0003/"
            },
            {
                "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-4509",
                "url": "https://www.debian.org/security/2019/dsa-4509"
            },
            {
                "refsource": "BUGTRAQ",
                "name": "20190826 [SECURITY] [DSA 4509-1] apache2 security update",
                "url": "https://seclists.org/bugtraq/2019/Aug/47"
            },
            {
                "refsource": "UBUNTU",
                "name": "USN-4113-1",
                "url": "https://usn.ubuntu.com/4113-1/"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2019-4427fd65be",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BP556LEG3WENHZI5TAQ6ZEBFTJB4E2IS/"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2019-63ba15cc83",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XHTKU7YQ5EEP2XNSAV4M4VJ7QCBOJMOD/"
            },
            {
                "refsource": "SUSE",
                "name": "openSUSE-SU-2019:2051",
                "url": "http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00004.html"
            },
            {
                "refsource": "CONFIRM",
                "name": "https://security.netapp.com/advisory/ntap-20190905-0003/",
                "url": "https://security.netapp.com/advisory/ntap-20190905-0003/"
            },
            {
                "refsource": "GENTOO",
                "name": "GLSA-201909-04",
                "url": "https://security.gentoo.org/glsa/201909-04"
            },
            {
                "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-2019:2893",
                "url": "https://access.redhat.com/errata/RHSA-2019:2893"
            },
            {
                "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-2019:2946",
                "url": "https://access.redhat.com/errata/RHSA-2019:2946"
            },
            {
                "refsource": "REDHAT",
                "name": "RHSA-2019:2950",
                "url": "https://access.redhat.com/errata/RHSA-2019:2950"
            },
            {
                "refsource": "REDHAT",
                "name": "RHSA-2019:2949",
                "url": "https://access.redhat.com/errata/RHSA-2019:2949"
            },
            {
                "refsource": "REDHAT",
                "name": "RHSA-2019:2955",
                "url": "https://access.redhat.com/errata/RHSA-2019:2955"
            },
            {
                "refsource": "CONFIRM",
                "name": "https://support.f5.com/csp/article/K02591030?utm_source=f5support&utm_medium=RSS",
                "url": "https://support.f5.com/csp/article/K02591030?utm_source=f5support&utm_medium=RSS"
            },
            {
                "url": "https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html",
                "refsource": "MISC",
                "name": "https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html"
            },
            {
                "refsource": "REDHAT",
                "name": "RHSA-2019:3933",
                "url": "https://access.redhat.com/errata/RHSA-2019:3933"
            },
            {
                "refsource": "REDHAT",
                "name": "RHSA-2019:3935",
                "url": "https://access.redhat.com/errata/RHSA-2019:3935"
            },
            {
                "refsource": "REDHAT",
                "name": "RHSA-2019:3932",
                "url": "https://access.redhat.com/errata/RHSA-2019:3932"
            },
            {
                "refsource": "MLIST",
                "name": "[httpd-cvs] 20200401 svn commit: r1058586 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html",
                "url": "https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f@%3Ccvs.httpd.apache.org%3E"
            },
            {
                "refsource": "MLIST",
                "name": "[httpd-cvs] 20200401 svn commit: r1058587 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html",
                "url": "https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234@%3Ccvs.httpd.apache.org%3E"
            },
            {
                "url": "https://www.oracle.com/security-alerts/cpuapr2020.html",
                "refsource": "MISC",
                "name": "https://www.oracle.com/security-alerts/cpuapr2020.html"
            },
            {
                "refsource": "MLIST",
                "name": "[httpd-cvs] 20210330 svn commit: r1073139 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/json/",
                "url": "https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9@%3Ccvs.httpd.apache.org%3E"
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            {
                "refsource": "MLIST",
                "name": "[httpd-cvs] 20210330 svn commit: r1073143 [3/3] - in /websites/staging/httpd/trunk/content: ./ security/",
                "url": "https://lists.apache.org/thread.html/r06f0d87ebb6d59ed8379633f36f72f5b1f79cadfda72ede0830b42cf@%3Ccvs.httpd.apache.org%3E"
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            {
                "refsource": "MLIST",
                "name": "[httpd-cvs] 20210330 svn commit: r1073140 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/cvejsontohtml.py security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html",
                "url": "https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a@%3Ccvs.httpd.apache.org%3E"
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                "refsource": "MLIST",
                "name": "[httpd-cvs] 20210330 svn commit: r1073139 [12/13] - in /websites/staging/httpd/trunk/content: ./ security/json/",
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                "refsource": "MLIST",
                "name": "[httpd-cvs] 20210330 svn commit: r1888194 [12/13] - /httpd/site/trunk/content/security/json/",
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            {
                "refsource": "MLIST",
                "name": "[httpd-cvs] 20210330 svn commit: r1073149 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/",
                "url": "https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920@%3Ccvs.httpd.apache.org%3E"
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                "refsource": "MLIST",
                "name": "[httpd-cvs] 20210330 svn commit: r1073149 [13/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/",
                "url": "https://lists.apache.org/thread.html/r3c5c3104813c1c5508b55564b66546933079250a46ce50eee90b2e36@%3Ccvs.httpd.apache.org%3E"
            },
            {
                "refsource": "MLIST",
                "name": "[httpd-cvs] 20210606 svn commit: r1075470 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/json/CVE-2020-13938.json security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html",
                "url": "https://lists.apache.org/thread.html/r76142b8c5119df2178be7c2dba88fde552eedeec37ea993dfce68d1d@%3Ccvs.httpd.apache.org%3E"
            }
        ]
    },
    "source": {
        "discovery": "UNKNOWN"
    }
}