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CVE-2019-9517

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Date: August 13, 2019

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.

Language: C

Severity Score

7.5

Related Resources (53)

Url: https://www.oracle.com/security-alerts/cpuapr2020.html

Url: https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html

Url: https://kc.mcafee.com/corporate/index?page=content&id=SB10296

Url: https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234@%3Ccvs.httpd.apache.org%3E

Url: http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00004.html

Url: https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a@%3Ccvs.httpd.apache.org%3E

Url: https://support.f5.com/csp/article/K02591030

Url: https://www.debian.org/security/2019/dsa-4509

Url: https://access.redhat.com/errata/RHSA-2019:2939

Url: https://support.f5.com/csp/article/K02591030?utm_source=f5support&utm_medium=RSS

Url: https://seclists.org/bugtraq/2019/Aug/47

Url: https://nvd.nist.gov/vuln/detail/CVE-2019-9517

Url: https://lists.apache.org/thread.html/r03ee478b3dda3e381fd6189366fa7af97c980d2f602846eef935277d@%3Ccvs.httpd.apache.org%3E

Url: https://access.redhat.com/errata/RHSA-2019:2950

Url: https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9@%3Ccvs.httpd.apache.org%3E

Url: https://security.netapp.com/advisory/ntap-20190823-0003/

Url: https://access.redhat.com/security/cve/CVE-2019-9517

Url: http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00031.html

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CMNFX5MNYRWWIMO4BTKYQCGUDMHO3AXP/

Url: https://lists.apache.org/thread.html/d89f999e26dfb1d50f247ead1fe8538014eb412b2dbe5be4b1a9ef50@%3Cdev.httpd.apache.org%3E

Url: http://www.openwall.com/lists/oss-security/2019/08/15/7

Url: https://access.redhat.com/errata/RHSA-2019:2946

Url: https://usn.ubuntu.com/4113-1/

Url: https://access.redhat.com/errata/RHSA-2019:2949

Url: https://security.netapp.com/advisory/ntap-20190905-0003/

Url: https://lists.apache.org/thread.html/r06f0d87ebb6d59ed8379633f36f72f5b1f79cadfda72ede0830b42cf@%3Ccvs.httpd.apache.org%3E

Url: https://access.redhat.com/errata/RHSA-2019:3932

Url: https://security-tracker.debian.org/tracker/CVE-2019-9517

Url: https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f@%3Ccvs.httpd.apache.org%3E

Url: https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.md

Url: https://security.alpinelinux.org/vuln/CVE-2019-9517

Url: https://lists.apache.org/thread.html/ec97fdfc1a859266e56fef084353a34e0a0b08901b3c1aa317a43c8c@%3Cdev.httpd.apache.org%3E

Url: http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00032.html

Url: https://access.redhat.com/errata/RHSA-2019:2955

Url: https://people.canonical.com/~ubuntu-security/cve/CVE-2019-9517

Url: https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920@%3Ccvs.httpd.apache.org%3E

Url: https://lists.apache.org/thread.html/r3c5c3104813c1c5508b55564b66546933079250a46ce50eee90b2e36@%3Ccvs.httpd.apache.org%3E

Url: https://access.redhat.com/errata/RHSA-2019:2893

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XHTKU7YQ5EEP2XNSAV4M4VJ7QCBOJMOD/

Url: https://security.netapp.com/advisory/ntap-20190823-0005/

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BP556LEG3WENHZI5TAQ6ZEBFTJB4E2IS/

Url: https://lists.apache.org/thread.html/rd2fb621142e7fa187cfe12d7137bf66e7234abcbbcd800074c84a538@%3Ccvs.httpd.apache.org%3E

Url: https://security.gentoo.org/glsa/201909-04

Url: https://lists.apache.org/thread.html/4610762456644181b267c846423b3a990bd4aaea1886ecc7d51febdb@%3Cannounce.httpd.apache.org%3E

Url: https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba@%3Ccvs.httpd.apache.org%3E

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4ZQGHE3WTYLYAYJEIDJVF2FIGQTAYPMC/

Url: https://lists.apache.org/thread.html/r76142b8c5119df2178be7c2dba88fde552eedeec37ea993dfce68d1d@%3Ccvs.httpd.apache.org%3E

Url: https://access.redhat.com/errata/RHSA-2019:3933

Url: https://access.redhat.com/errata/RHSA-2019:3935

Url: https://kb.cert.org/vuls/id/605641/

Url: https://www.synology.com/security/advisory/Synology_SA_19_33

Url: https://access.redhat.com/errata/RHSA-2019:2925

Url: https://www.mend.io/vulnerability-database/CVE-2019-9517

Severity Score

7.5

Weakness Type (CWE)

Uncontrolled Resource Consumption ('Resource Exhaustion')

CWE-400

Allocation of Resources Without Limits or Throttling

CWE-770

Top Fix

Upgrade Version

Upgrade to version 7.1.7,8.0.4

CVSS v3.1

Base Score:	7.5
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	LOW
Privileges Required (PR):	NONE
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	NONE
Integrity (I):	NONE
Availability (A):	HIGH

CVSS v2

Base Score:	7.8
Access Vector (AV):	NETWORK
Access Complexity (AC):	LOW
Authentication (AU):	NONE
Confidentiality (C):	NONE
Integrity (I):	NONE
Availability (A):	COMPLETE
Additional information:

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