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.

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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
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

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'}


Projects

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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