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CVE-2020-11080 Detail

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

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CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00024.html Mailing List  Third Party Advisory 
https://github.com/nghttp2/nghttp2/commit/336a98feb0d56b9ac54e12736b18785c27f75090 Patch  Third Party Advisory 
https://github.com/nghttp2/nghttp2/commit/f8da73bd042f810f34d19f9eae02b46d870af394 Patch  Third Party Advisory 
https://github.com/nghttp2/nghttp2/security/advisories/GHSA-q5wr-xfw9-q7xr Patch  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2021/10/msg00011.html Mailing 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-4696 Third Party Advisory 
https://www.oracle.com//security-alerts/cpujul2021.html Not Applicable  Third Party Advisory 
https://www.oracle.com/security-alerts/cpuapr2022.html Patch  Third Party Advisory 
https://www.oracle.com/security-alerts/cpujan2021.html Third Party Advisory 
https://www.oracle.com/security-alerts/cpujul2020.html Third Party Advisory 
https://www.oracle.com/security-alerts/cpuoct2020.html Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-400 Uncontrolled Resource Consumption cwe source acceptance level NIST  
CWE-707 Improper Neutralization GitHub, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

19 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2020-11080
NVD Published Date:
06/03/2020
NVD Last Modified:
11/06/2023
Source:
GitHub, Inc.