CVE-2019-9517

CVE Details

Release Date:	2019-08-13
Impact:	Important	What is this?

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.

See more information about CVE-2019-9517 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	7.5
Vector String:	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Version:	3.0
Attack Vector:	Network
Attack Complexity:	Low
Privileges Required:	None
User Interaction:	None
Scope:	Unchanged
Confidentiality Impact:	None
Integrity Impact:	None
Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 8 (httpd)	ELSA-2019-2893	2019-09-24
Oracle Linux version 8 (mod_http2)	ELSA-2019-2893	2019-09-24
Oracle Linux version 8 (nodejs)	ELSA-2019-2925	2019-09-30
Oracle Linux version 8 (nodejs-nodemon)	ELSA-2019-2925	2019-09-30
Oracle Linux version 8 (nodejs-packaging)	ELSA-2019-2925	2019-09-30