Vulnerability Details : CVE-2020-11080
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.
Vulnerability category: Denial of service
Products affected by CVE-2020-11080
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:mysql:*:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:mysql:*:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:mysql:*:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:mysql:*:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:mysql:*:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:enterprise_communications_broker:3.1.0:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:enterprise_communications_broker:3.2.0:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:graalvm:19.3.2:*:*:*:enterprise:*:*:*
- cpe:2.3:a:oracle:graalvm:20.1.0:*:*:*:enterprise:*:*:*
- cpe:2.3:a:oracle:banking_extensibility_workbench:14.3.0:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:banking_extensibility_workbench:14.4.0:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:blockchain_platform:*:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
- cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
- cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:*
- cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:*
- cpe:2.3:a:nodejs:node.js:*:*:*:*:lts:*:*:*
- cpe:2.3:a:nodejs:node.js:*:*:*:*:lts:*:*:*
- cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:*
- cpe:2.3:a:nghttp2:nghttp2:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-11080
0.76%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 81 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-11080
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST | |
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST | |
3.7
|
LOW | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L |
2.2
|
1.4
|
GitHub, Inc. |
CWE ids for CVE-2020-11080
-
The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.Assigned by: nvd@nist.gov (Secondary)
-
The product does not ensure or incorrectly ensures that structured messages or data are well-formed and that certain security properties are met before being read from an upstream component or sent to a downstream component.Assigned by: security-advisories@github.com (Primary)
References for CVE-2020-11080
-
https://github.com/nghttp2/nghttp2/commit/336a98feb0d56b9ac54e12736b18785c27f75090
Implement max settings option · nghttp2/nghttp2@336a98f · GitHubPatch;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AAC2AA36OTRHKSVM5OV7TTVB3CZIGEFL/
[SECURITY] Fedora 31 Update: nghttp2-1.41.0-1.fc31 - package-announce - Fedora Mailing-ListsThird Party Advisory
-
https://www.oracle.com/security-alerts/cpuoct2020.html
Oracle Critical Patch Update Advisory - October 2020Third Party Advisory
-
https://www.oracle.com/security-alerts/cpuapr2022.html
Oracle Critical Patch Update Advisory - April 2022Patch;Third Party Advisory
-
https://www.debian.org/security/2020/dsa-4696
Debian -- Security Information -- DSA-4696-1 nodejsThird Party Advisory
-
https://www.oracle.com/security-alerts/cpujul2020.html
Oracle Critical Patch Update Advisory - July 2020Third Party Advisory
-
https://github.com/nghttp2/nghttp2/security/advisories/GHSA-q5wr-xfw9-q7xr
Denial of service: Overly large SETTINGS frames · Advisory · nghttp2/nghttp2 · GitHubPatch;Third Party Advisory
-
https://www.oracle.com//security-alerts/cpujul2021.html
Oracle Critical Patch Update Advisory - July 2021Not Applicable;Third Party Advisory
-
https://www.oracle.com/security-alerts/cpujan2021.html
Oracle Critical Patch Update Advisory - January 2021Third Party Advisory
-
https://lists.debian.org/debian-lts-announce/2023/10/msg00023.html
[SECURITY] [DLA 3621-1] nghttp2 security update
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/
[SECURITY] Fedora 33 Update: nodejs-14.15.1-1.fc33 - package-announce - Fedora Mailing-ListsThird Party Advisory
-
https://github.com/nghttp2/nghttp2/commit/f8da73bd042f810f34d19f9eae02b46d870af394
Earlier check for settings flood · nghttp2/nghttp2@f8da73b · GitHubPatch;Third Party Advisory
-
https://lists.debian.org/debian-lts-announce/2021/10/msg00011.html
[SECURITY] [DLA 2786-1] nghttp2 security updateMailing List;Third Party Advisory
-
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00024.html
[security-announce] openSUSE-SU-2020:0802-1: critical: Security update fMailing List;Third Party Advisory
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