CVE-2020-11080

Name: CVE-2020-11080
Creator: NVD / NIST
Published: 2020-06-03T23:15:11.073+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 5.32%

Last modified Jun 17, 2026

CVE-2020-11080 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 5.32% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

5.32%

91.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Nghttp2	Nghttp2	< 1.41.0
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0
Opensuse	Leap	15.1
Fedoraproject	Fedora	31
Fedoraproject	Fedora	33
Oracle	Banking Extensibility Workbench	14.3.0
Oracle	Banking Extensibility Workbench	14.4.0
Oracle	Blockchain Platform	< 21.1.2
Oracle	Enterprise Communications Broker	3.1.0
Oracle	Enterprise Communications Broker	3.2.0
Oracle	Graalvm	19.3.2
Oracle	Graalvm	20.1.0
Oracle	Mysql	>= 7.3.0, <= 7.3.30
Oracle	Mysql	>= 7.4.0, <= 7.4.29
Oracle	Mysql	>= 7.5.0, <= 7.5.19
Oracle	Mysql	>= 7.6.0, <= 7.6.15
Oracle	Mysql	>= 8.0.0, <= 8.0.21
Nodejs	Node.Js	>= 10.0.0, <= 10.12.0
Nodejs	Node.Js	>= 10.13.0, < 10.21.0
Nodejs	Node.Js	>= 12.0.0, <= 12.12.0
Nodejs	Node.Js	>= 12.13.0, < 12.18.0
Nodejs	Node.Js	>= 14.0.0, <= 14.4.0

References

http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00024.htmlMailing List, Third Party Advisory
https://github.com/nghttp2/nghttp2/commit/336a98feb0d56b9ac54e12736b18785c27f75090Patch, Third Party Advisory
https://github.com/nghttp2/nghttp2/commit/f8da73bd042f810f34d19f9eae02b46d870af394Patch, Third Party Advisory
https://github.com/nghttp2/nghttp2/security/advisories/GHSA-q5wr-xfw9-q7xrPatch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/10/msg00011.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00023.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AAC2AA36OTRHKSVM5OV7TTVB3CZIGEFL/
https://www.debian.org/security/2020/dsa-4696Third Party Advisory
https://www.oracle.com//security-alerts/cpujul2021.htmlNot Applicable, Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2021.htmlThird Party Advisory
https://www.oracle.com/security-alerts/cpujul2020.htmlThird Party Advisory
https://www.oracle.com/security-alerts/cpuoct2020.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00024.htmlMailing List, Third Party Advisory
https://github.com/nghttp2/nghttp2/commit/336a98feb0d56b9ac54e12736b18785c27f75090Patch, Third Party Advisory
https://github.com/nghttp2/nghttp2/commit/f8da73bd042f810f34d19f9eae02b46d870af394Patch, Third Party Advisory
https://github.com/nghttp2/nghttp2/security/advisories/GHSA-q5wr-xfw9-q7xrPatch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/10/msg00011.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00023.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AAC2AA36OTRHKSVM5OV7TTVB3CZIGEFL/
https://www.debian.org/security/2020/dsa-4696Third Party Advisory
https://www.oracle.com//security-alerts/cpujul2021.htmlNot Applicable, Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2021.htmlThird Party Advisory
https://www.oracle.com/security-alerts/cpujul2020.htmlThird Party Advisory
https://www.oracle.com/security-alerts/cpuoct2020.htmlThird Party Advisory

Timeline

Published: Jun 3, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-11080?

How severe is CVE-2020-11080?

CVE-2020-11080 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 5.32% probability of exploitation in the next 30 days.

How do I fix CVE-2020-11080?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-11080?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST