High severity · published Jun 3, 2020
CVE-2020-11080
In nghttp2 before version 1.41.0, the overly large HTTP/2 SETTINGS frame payload causes denial of service
7.5
CVSS
5.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)5.3% · higher than 93% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MY
MySQL · Oracle
7.3.0 through 7.3.30; 7.4.0 through 7.4.29; 7.5.0 through 7.5.19; 7.6.0 through 7.6.15; 8.0.0 through 8.0.21 · source: NVD
BE
Banking Extensibility Workbench · Oracle
14.3.0; 14.4.0 · source: NVD
BP
Blockchain Platform · Oracle
before 21.1.2 · source: NVD
DL
Debian Linux · Debian
9.0; 10.0 · source: NVD
EC
Enterprise Communications Broker · Oracle
3.1.0; 3.2.0 · source: NVD
FE
Fedora · Fedoraproject
31; 33 · source: NVD
GR
Graalvm · Oracle
19.3.2; 20.1.0 · source: NVD
LE
Leap · Opensuse
15.1 · source: NVD
NG
Nghttp2 · Nghttp2
before 1.41.0 · source: NVD
NO
Node.js · Nodejs
10.0.0 through 10.12.0; 10.13.0 before 10.21.0; 12.0.0 through 12.12.0; 12.13.0 before 12.18.0; 14.0.0 through 14.4.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-11080
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-11080
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00024.html
Patch
https://github.com/nghttp2/nghttp2/commit/336a98feb0d56b9ac54e12736b18785c27f75090
Patch
https://github.com/nghttp2/nghttp2/commit/f8da73bd042f810f34d19f9eae02b46d870af394
Patch
https://github.com/nghttp2/nghttp2/security/advisories/GHSA-q5wr-xfw9-q7xr
Mailing List
https://lists.debian.org/debian-lts-announce/2021/10/msg00011.html
lists.debian.org
https://lists.debian.org/debian-lts-announce/2023/10/msg00023.html
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