CVE-2019-9517

HIGH

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.

References

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

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

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

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

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

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

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

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

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

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

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

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

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

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

https://lists.apache.org/thread.html/[email protected]%3Cannounce.httpd.apache.org%3E

https://lists.apache.org/thread.html/[email protected]%3Ccvs.httpd.apache.org%3E

https://lists.apache.org/thread.html/[email protected]%3Cdev.httpd.apache.org%3E

https://lists.apache.org/thread.html/[email protected]%3Cdev.httpd.apache.org%3E

https://lists.fedoraproject.org/archives/list/[email protected]/message/4ZQGHE3WTYLYAYJEIDJVF2FIGQTAYPMC/

https://lists.fedoraproject.org/archives/list/[email protected]/message/BP556LEG3WENHZI5TAQ6ZEBFTJB4E2IS/

https://lists.fedoraproject.org/archives/list/[email protected]/message/CMNFX5MNYRWWIMO4BTKYQCGUDMHO3AXP/

https://lists.fedoraproject.org/archives/list/[email protected]/message/XHTKU7YQ5EEP2XNSAV4M4VJ7QCBOJMOD/

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

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

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

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

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

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

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

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

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

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

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

Details

Source: MITRE

Published: 2019-08-13

Updated: 2019-08-23

Type: CWE-400

Risk Information

CVSS v2.0

Base Score: 7.8

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C

Impact Score: 6.9

Exploitability Score: 10

Severity: HIGH

CVSS v3.0

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Impact Score: 3.6

Exploitability Score: 3.9

Severity: HIGH