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.
Published: 2020-06-03
Score: 3.7 Low
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-2786-1 nghttp2 security update
Debian DLA Debian DLA DLA-3621-1 nghttp2 security update
Debian DSA Debian DSA DSA-4696-1 nodejs security update
EUVD EUVD EUVD-2020-3444 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.
Ubuntu USN Ubuntu USN USN-6142-1 nghttp2 vulnerability
History

Mon, 09 Jun 2025 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Subscriptions

Debian Debian Linux
Fedoraproject Fedora
Nghttp2 Nghttp2
Nodejs Node.js
Opensuse Leap
Oracle Banking Extensibility Workbench Blockchain Platform Enterprise Communications Broker Graalvm Mysql
Redhat Enterprise Linux Jboss Core Services Rhel E4s Rhel Eus Rhel Software Collections Service Mesh
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2025-06-09T15:45:50.711Z

Reserved: 2020-03-30T00:00:00.000Z

Link: CVE-2020-11080

cve-icon Vulnrichment

Updated: 2024-08-04T11:21:14.514Z

cve-icon NVD

Status : Modified

Published: 2020-06-03T23:15:11.073

Modified: 2024-11-21T04:56:44.657

Link: CVE-2020-11080

cve-icon Redhat

Severity : Important

Publid Date: 2020-06-02T00:00:00Z

Links: CVE-2020-11080 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses