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Vulnerability Details : CVE-2019-9517

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.
Publish Date : 2019-08-13 Last Update Date : 2021-06-06
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- CVSS Scores & Vulnerability Types

CVSS Score
7.8
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of Service
CWE ID 770

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2019:2893: httpd:2.4 security update (Important) oval:com.redhat.rhsa:def:20192893 unix
RHSA-2019:2925: nodejs:10 security update (Important) oval:com.redhat.rhsa:def:20192925 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2019-9517

# Product Type Vendor Product Version Update Edition Language
1 Application Apache Traffic Server * * * * Version Details Vulnerabilities
2 OS Canonical Ubuntu Linux 16.04 * * * Version Details Vulnerabilities
3 OS Canonical Ubuntu Linux 18.04 * * * Version Details Vulnerabilities
4 OS Canonical Ubuntu Linux 19.04 * * * Version Details Vulnerabilities
5 OS Debian Debian Linux 9.0 * * * Version Details Vulnerabilities
6 OS Debian Debian Linux 10.0 * * * Version Details Vulnerabilities
7 OS Fedoraproject Fedora 29 * * * Version Details Vulnerabilities
8 OS Fedoraproject Fedora 30 * * * Version Details Vulnerabilities
9 Application Mcafee Web Gateway * * * * Version Details Vulnerabilities
10 Application Netapp Clustered Data Ontap - * * * Version Details Vulnerabilities
11 OS Opensuse Leap 15.0 * * * Version Details Vulnerabilities
12 OS Opensuse Leap 15.1 * * * Version Details Vulnerabilities
13 Application Oracle Communications Element Manager 8.0.0 * * * Version Details Vulnerabilities
14 Application Oracle Communications Element Manager 8.1.0 * * * Version Details Vulnerabilities
15 Application Oracle Communications Element Manager 8.1.1 * * * Version Details Vulnerabilities
16 Application Oracle Communications Element Manager 8.2.0 * * * Version Details Vulnerabilities
17 Application Oracle Graalvm 19.2.0 * * * Version Details Vulnerabilities
18 Application Oracle Instantis Enterprisetrack * * * * Version Details Vulnerabilities
19 Application Oracle Retail Xstore Point Of Service 7.1 * * * Version Details Vulnerabilities
20 OS Redhat Enterprise Linux 8.0 * * * Version Details Vulnerabilities
21 Application Redhat Jboss Core Services 1.0 * * * Version Details Vulnerabilities
22 Application Redhat Jboss Enterprise Application Platform 7.2.0 * * * Version Details Vulnerabilities
23 Application Redhat Jboss Enterprise Application Platform 7.3.0 * * * Version Details Vulnerabilities
24 Application Redhat Openshift Service Mesh 1.0 * * * Version Details Vulnerabilities
25 Application Redhat Quay 3.0.0 * * * Version Details Vulnerabilities
26 Application Redhat Software Collections 1.0 * * * Version Details Vulnerabilities
27 Application Synology Diskstation Manager 6.2 * * * Version Details Vulnerabilities
28 Application Synology Skynas - * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Apache Traffic Server 1
Canonical Ubuntu Linux 3
Debian Debian Linux 2
Fedoraproject Fedora 2
Mcafee Web Gateway 1
Netapp Clustered Data Ontap 1
Opensuse Leap 2
Oracle Communications Element Manager 4
Oracle Graalvm 1
Oracle Instantis Enterprisetrack 1
Oracle Retail Xstore Point Of Service 1
Redhat Enterprise Linux 1
Redhat Jboss Core Services 1
Redhat Jboss Enterprise Application Platform 2
Redhat Openshift Service Mesh 1
Redhat Quay 1
Redhat Software Collections 1
Synology Diskstation Manager 1
Synology Skynas 1

- References For CVE-2019-9517

https://lists.apache.org/thread.html/[email protected]%3Ccvs.httpd.apache.org%3E
MLIST [httpd-cvs] 20210330 svn commit: r1073149 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/
https://access.redhat.com/errata/RHSA-2019:2949
REDHAT RHSA-2019:2949
https://access.redhat.com/errata/RHSA-2019:2955
REDHAT RHSA-2019:2955
https://support.f5.com/csp/article/K02591030?utm_source=f5support&utm_medium=RSS CONFIRM
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
https://lists.apache.org/thread.html/[email protected]%3Ccvs.httpd.apache.org%3E
MLIST [httpd-cvs] 20210330 svn commit: r1073149 [13/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/
https://lists.apache.org/thread.html/[email protected]%3Ccvs.httpd.apache.org%3E
MLIST [httpd-cvs] 20210330 svn commit: r1073143 [3/3] - in /websites/staging/httpd/trunk/content: ./ security/
https://lists.apache.org/thread.html/[email protected]%3Ccvs.httpd.apache.org%3E
MLIST [httpd-cvs] 20210330 svn commit: r1073139 [12/13] - in /websites/staging/httpd/trunk/content: ./ security/json/
https://lists.apache.org/thread.html/[email protected]%3Ccvs.httpd.apache.org%3E
MLIST [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
https://lists.apache.org/thread.html/[email protected]%3Ccvs.httpd.apache.org%3E
MLIST [httpd-cvs] 20210330 svn commit: r1073139 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/json/
https://lists.apache.org/thread.html/[email protected]%3Ccvs.httpd.apache.org%3E
MLIST [httpd-cvs] 20210330 svn commit: r1888194 [12/13] - /httpd/site/trunk/content/security/json/
https://lists.apache.org/thread.html/[email protected]%3Ccvs.httpd.apache.org%3E
MLIST [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
https://lists.fedoraproject.org/archives/list/[email protected]/message/XHTKU7YQ5EEP2XNSAV4M4VJ7QCBOJMOD/
FEDORA FEDORA-2019-63ba15cc83
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00004.html
SUSE openSUSE-SU-2019:2051
https://security.netapp.com/advisory/ntap-20190905-0003/ CONFIRM
https://www.oracle.com/security-alerts/cpuapr2020.html
N/A N/A
https://lists.apache.org/thread.html/[email protected]%3Ccvs.httpd.apache.org%3E
MLIST [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
https://lists.apache.org/thread.html/[email protected]%3Ccvs.httpd.apache.org%3E
MLIST [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
https://access.redhat.com/errata/RHSA-2019:3935
REDHAT RHSA-2019:3935
https://access.redhat.com/errata/RHSA-2019:3933
REDHAT RHSA-2019:3933
https://access.redhat.com/errata/RHSA-2019:3932
REDHAT RHSA-2019:3932
https://access.redhat.com/errata/RHSA-2019:2950
REDHAT RHSA-2019:2950
https://access.redhat.com/errata/RHSA-2019:2946
REDHAT RHSA-2019:2946
https://access.redhat.com/errata/RHSA-2019:2939
REDHAT RHSA-2019:2939
https://security.gentoo.org/glsa/201909-04
GENTOO GLSA-201909-04
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00032.html
SUSE openSUSE-SU-2019:2114
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00031.html
SUSE openSUSE-SU-2019:2115
https://kc.mcafee.com/corporate/index?page=content&id=SB10296 CONFIRM
https://access.redhat.com/errata/RHSA-2019:2893
REDHAT RHSA-2019:2893
https://access.redhat.com/errata/RHSA-2019:2925
REDHAT RHSA-2019:2925
https://lists.fedoraproject.org/archives/list/[email protected]/message/BP556LEG3WENHZI5TAQ6ZEBFTJB4E2IS/
FEDORA FEDORA-2019-4427fd65be
https://usn.ubuntu.com/4113-1/
UBUNTU USN-4113-1
https://www.synology.com/security/advisory/Synology_SA_19_33 CONFIRM
https://support.f5.com/csp/article/K02591030 CONFIRM
https://security.netapp.com/advisory/ntap-20190823-0005/ CONFIRM
https://security.netapp.com/advisory/ntap-20190823-0003/ CONFIRM
https://www.debian.org/security/2019/dsa-4509
DEBIAN DSA-4509
https://seclists.org/bugtraq/2019/Aug/47
BUGTRAQ 20190826 [SECURITY] [DSA 4509-1] apache2 security update
https://lists.fedoraproject.org/archives/list/[email protected]/message/CMNFX5MNYRWWIMO4BTKYQCGUDMHO3AXP/
FEDORA FEDORA-2019-5a6a7bc12c
https://lists.fedoraproject.org/archives/list/[email protected]/message/4ZQGHE3WTYLYAYJEIDJVF2FIGQTAYPMC/
FEDORA FEDORA-2019-6a2980de56
https://lists.apache.org/thread.html/[email protected]%3Cdev.httpd.apache.org%3E
MLIST [httpd-dev] 20190817 CVE-2019-10097 vs. CHANGEs entry
http://www.openwall.com/lists/oss-security/2019/08/15/7
MLIST [oss-security] 20190814 CVE-2019-9517: mod_http2, DoS attack by exhausting h2 workers
https://lists.apache.org/thread.html/[email protected]%3Cdev.httpd.apache.org%3E
MLIST [httpd-dev] 20190817 Re: CVE-2019-10097 vs. CHANGEs entry
https://kb.cert.org/vuls/id/605641/
CERT-VN VU#605641
https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.md
https://lists.apache.org/thread.html/[email protected]%3Cannounce.httpd.apache.org%3E
MLIST [httpd-announce] 20190814 CVE-2019-9517: mod_http2, DoS attack by exhausting h2 workers
https://lists.apache.org/thread.html/[email protected]%3Ccvs.httpd.apache.org%3E
MLIST [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

- Vulnerability Conditions

Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0

- Metasploit Modules Related To CVE-2019-9517

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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