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CVE-2020-11080

Denial of service in nghttp2

Published: Jun 3, 2020Updated: Nov 21, 2024 Sources: CVE List NVD BDU csafCWE-707
NVD MITRE
3.7CVSSLOW
EPSS Score
5.3%
Top 8.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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 Breakdown

AV:NAC:HPR:NUI:NS:UC:NI:NA:L
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

CWE-707CWE-400

Affected Products

nghttp2nghttp2
Library
OSS Libraries / generic-library
debian linuxdebian
On-premOS
Operating Systems / linux-distro
leapopensuse
On-premOS
Operating Systems / linux-distro
fedorafedoraproject
On-premOS
Operating Systems / linux-distro
banking extensibility workbenchoracle
On-prem
Databases / relational
nghttp2oss-projectOSS Librariesaka nghttp2, ngtcp2
debianoss-projectGBOperating Systemsaka debian gnu/linux
opensuseoss-projectDEOperating Systemsaka opensuse
fedoraprojectoss-projectUSOperating Systemsaka fedora project
oraclecommercialUSDatabasesaka oracle corp.
and 16 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://www.debian.org/security/2020/dsa-4696
debian.org
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00024.html
lists.opensuse.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AAC2AA36OTRHKSVM5OV7TTVB3CZIGEFL/
lists.fedoraproject.org
and 34 more references View all →

Timeline

Published
Jun 3, 2020
Last Updated
Nov 21, 2024

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