CVE-2020-11080

CVE Details

Release Date:	2020-06-03
Impact:	None	What is this?

Description

In nghttp2 before version 1.41.0, the overly large HTTP/2 SETTINGS frame payload causes denial of service. The proof of concept attack involves a malicious client constructing a SETTINGS frame with a length of 14,400 bytes (2400 individual settings entries) over and over again. The attack causes the CPU to spike at 100%. nghttp2 v1.41.0 fixes this vulnerability. There is a workaround to this vulnerability. Implement nghttp2_on_frame_recv_callback callback, and if received frame is SETTINGS frame and the number of settings entries are large (e.g., > 32), then drop the connection.

See more information about CVE-2020-11080 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 7 (istio)	ELSA-2020-5765	2020-07-22
Oracle Linux version 7 (kata)	ELSA-2020-5765	2020-07-22
Oracle Linux version 7 (kata-image)	ELSA-2020-5765	2020-07-22
Oracle Linux version 7 (kata-runtime)	ELSA-2020-5765	2020-07-22
Oracle Linux version 7 (kernel-uek-container)	ELSA-2020-5765	2020-07-22
Oracle Linux version 7 (kubernetes)	ELSA-2020-5765	2020-07-22
Oracle Linux version 7 (olcne)	ELSA-2020-5765	2020-07-22
Oracle Linux version 8 (nghttp2)	ELSA-2020-2755	2020-07-06
Oracle Linux version 8 (nodejs)	ELSA-2020-2848	2020-07-14
Oracle Linux version 8 (nodejs)	ELSA-2020-2852	2020-07-14
Oracle Linux version 8 (nodejs-nodemon)	ELSA-2020-2848	2020-07-14
Oracle Linux version 8 (nodejs-nodemon)	ELSA-2020-2852	2020-07-14
Oracle Linux version 8 (nodejs-packaging)	ELSA-2020-2848	2020-07-14