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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.
Publish Date : 2020-06-03 Last Update Date : 2022-05-12
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- CVSS Scores & Vulnerability Types

CVSS Score
5.0
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of Service
CWE ID 707

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2020:2755: nghttp2 security update (Important) oval:com.redhat.rhsa:def:20202755 unix
RHSA-2020:2848: nodejs:10 security update (Important) oval:com.redhat.rhsa:def:20202848 unix
RHSA-2020:2852: nodejs:12 security update (Important) oval:com.redhat.rhsa:def:20202852 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2020-11080

# Product Type Vendor Product Version Update Edition Language
1 OS Debian Debian Linux 9.0 * * * Version Details Vulnerabilities
2 OS Debian Debian Linux 10.0 * * * Version Details Vulnerabilities
3 OS Fedoraproject Fedora 31 * * * Version Details Vulnerabilities
4 OS Fedoraproject Fedora 33 * * * Version Details Vulnerabilities
5 Application Nghttp2 Nghttp2 * * * * Version Details Vulnerabilities
6 OS Opensuse Leap 15.1 * * * Version Details Vulnerabilities
7 Application Oracle Banking Extensibility Workbench 14.3.0 * * * Version Details Vulnerabilities
8 Application Oracle Banking Extensibility Workbench 14.4.0 * * * Version Details Vulnerabilities
9 Application Oracle Blockchain Platform * * * * Version Details Vulnerabilities
10 Application Oracle Enterprise Communications Broker 3.1.0 * * * Version Details Vulnerabilities
11 Application Oracle Enterprise Communications Broker 3.2.0 * * * Version Details Vulnerabilities
12 Application Oracle Graalvm 19.3.2 * * * Version Details Vulnerabilities
13 Application Oracle Graalvm 20.1.0 * * * Version Details Vulnerabilities
14 Application Oracle Mysql * * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Debian Debian Linux 2
Fedoraproject Fedora 2
Nghttp2 Nghttp2 1
Opensuse Leap 1
Oracle Banking Extensibility Workbench 2
Oracle Blockchain Platform 1
Oracle Enterprise Communications Broker 2
Oracle Graalvm 2
Oracle Mysql 1

- References For CVE-2020-11080

https://github.com/nghttp2/nghttp2/commit/336a98feb0d56b9ac54e12736b18785c27f75090
https://www.oracle.com/security-alerts/cpuapr2022.html
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00024.html
SUSE openSUSE-SU-2020:0802
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AAC2AA36OTRHKSVM5OV7TTVB3CZIGEFL/
FEDORA FEDORA-2020-f7d15c8b77
https://www.oracle.com/security-alerts/cpujul2020.html
https://www.oracle.com/security-alerts/cpuoct2020.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/
FEDORA FEDORA-2020-43d5a372fc
https://www.oracle.com/security-alerts/cpujan2021.html
https://github.com/nghttp2/nghttp2/commit/f8da73bd042f810f34d19f9eae02b46d870af394
https://www.debian.org/security/2020/dsa-4696
DEBIAN DSA-4696
https://lists.debian.org/debian-lts-announce/2021/10/msg00011.html
MLIST [debian-lts-announce] 20211017 [SECURITY] [DLA 2786-1] nghttp2 security update
https://www.oracle.com//security-alerts/cpujul2021.html
N/A N/A
https://github.com/nghttp2/nghttp2/security/advisories/GHSA-q5wr-xfw9-q7xr CONFIRM

- Metasploit Modules Related To CVE-2020-11080

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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