CVE-2019-9517

Some HTTP/2 implementations are vulnerable to unconstrained interal data buffering, potentially leading to a denial of service

Published Aug 13, 2019 CVSS 3.1 · 7.5 High EPSS 27.0% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DSA Debian DSA DSA-4509-1 apache2 security update
EUVD EUVD EUVD-2019-18889 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.
Ubuntu USN Ubuntu USN USN-4113-1 Apache HTTP Server vulnerabilities
References
Link Providers
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00004.html cve-icon cve-icon
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00031.html cve-icon cve-icon
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00032.html cve-icon cve-icon
http://www.openwall.com/lists/oss-security/2019/08/15/7 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2019:2893 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2019:2925 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2019:2939 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2019:2946 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2019:2949 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2019:2950 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2019:2955 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2019:3932 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2019:3933 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2019:3935 cve-icon cve-icon
https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.md cve-icon cve-icon cve-icon
https://kb.cert.org/vuls/id/605641/ cve-icon cve-icon cve-icon
https://kc.mcafee.com/corporate/index?page=content&id=SB10296 cve-icon cve-icon
https://lists.apache.org/thread.html/4610762456644181b267c846423b3a990bd4aaea1886ecc7d51febdb%40%3Cannounce.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/d89f999e26dfb1d50f247ead1fe8538014eb412b2dbe5be4b1a9ef50%40%3Cdev.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/ec97fdfc1a859266e56fef084353a34e0a0b08901b3c1aa317a43c8c%40%3Cdev.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r03ee478b3dda3e381fd6189366fa7af97c980d2f602846eef935277d%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r06f0d87ebb6d59ed8379633f36f72f5b1f79cadfda72ede0830b42cf%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r3c5c3104813c1c5508b55564b66546933079250a46ce50eee90b2e36%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r76142b8c5119df2178be7c2dba88fde552eedeec37ea993dfce68d1d%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rd2fb621142e7fa187cfe12d7137bf66e7234abcbbcd800074c84a538%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4ZQGHE3WTYLYAYJEIDJVF2FIGQTAYPMC/ cve-icon cve-icon
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BP556LEG3WENHZI5TAQ6ZEBFTJB4E2IS/ cve-icon cve-icon
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CMNFX5MNYRWWIMO4BTKYQCGUDMHO3AXP/ cve-icon cve-icon
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XHTKU7YQ5EEP2XNSAV4M4VJ7QCBOJMOD/ cve-icon cve-icon
https://nodejs.org/en/blog/vulnerability/aug-2019-security-releases/ cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2019-9517 cve-icon
https://seclists.org/bugtraq/2019/Aug/47 cve-icon cve-icon
https://security.gentoo.org/glsa/201909-04 cve-icon cve-icon
https://security.netapp.com/advisory/ntap-20190823-0003/ cve-icon cve-icon
https://security.netapp.com/advisory/ntap-20190823-0005/ cve-icon cve-icon
https://security.netapp.com/advisory/ntap-20190905-0003/ cve-icon cve-icon
https://support.f5.com/csp/article/K02591030 cve-icon cve-icon
https://support.f5.com/csp/article/K02591030?utm_source=f5support&amp%3Butm_medium=RSS cve-icon cve-icon
https://usn.ubuntu.com/4113-1/ cve-icon cve-icon
https://www.cve.org/CVERecord?id=CVE-2019-9517 cve-icon
https://www.debian.org/security/2019/dsa-4509 cve-icon cve-icon
https://www.oracle.com/security-alerts/cpuapr2020.html cve-icon cve-icon
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html cve-icon cve-icon
https://www.synology.com/security/advisory/Synology_SA_19_33 cve-icon cve-icon
History
Type Values Removed Values Added
CPEs cpe:2.3:a:synology:diskstation_manager:6.2:*:*:*:*:*:*:* cpe:2.3:o:synology:diskstation_manager:6.2:*:*:*:*:*:*:*
Weaknesses

Sources

Status
PUBLISHED
Assigner
certcc
Published
Updated
Aug 4, 2024, 9:54 PM
Reserved
Mar 1, 2019, 12:00 AM
Status
Modified
Published
Aug 13, 2019, 9:15 PM
Modified
Jun 17, 2026, 2:43 AM
Severity
Important
Public date
Aug 13, 2019, 12:00 AM