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CVE-2020-11080

Published: 3 June 2020

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.

Notes

AuthorNote
sahnaseredini
nodejs uses system nghttp2

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
nodejs
Launchpad, Ubuntu, Debian
groovy Ignored
(end of life)
jammy Not vulnerable
(code-not-compiled)
impish Ignored
(end of life)
kinetic Not vulnerable
(code-not-compiled)
lunar Not vulnerable
(code-not-compiled)
bionic Not vulnerable
(code-not-compiled)
eoan Ignored
(end of life)
focal Not vulnerable
(code-not-compiled)
hirsute Ignored
(end of life)
trusty Not vulnerable
(code not present)
upstream Needs triage

xenial Not vulnerable
(code not present)
mantic Needs triage

nghttp2
Launchpad, Ubuntu, Debian
bionic
Released (1.30.0-1ubuntu1+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
focal
Released (1.40.0-1ubuntu0.1)
jammy Not vulnerable
(1.43.0-1build3)
kinetic Not vulnerable
(1.49.0-1)
lunar Not vulnerable
(1.52.0-1)
trusty Does not exist

upstream Needs triage

xenial
Released (1.7.1-1ubuntu0.1~esm1)
Available with Ubuntu Pro
mantic Not vulnerable
(1.53.0-1)

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H