CVE Database›Document archive›CVE-2021-22883

CVE-2021-22883

nodejs: HTTP2 'unknownProtocol' cause DoS by resource exhaustion

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Severity

Important

Red Hat Product Security

7.5

CVSS 3.1

Review impact separately from score.

Published · February 20, 2021

Updated · June 28, 2026

Description

A flaw was found in nodejs. When too many connection attempts with an 'unknownProtocol' are established a leak of file descriptors can occur leading to a potential denial of service. If a file descriptor limit is configured on the system, then the server is unable to accept new connections and prevent the process also from opening. If no file descriptor limit is configured, then this can lead to an excessive memory usage and cause the system to run out of memory. The highest threat from this vulnerability is to system availability.

Statement

Red Hat Quay from version 3.4 consumes the nodejs from RHEL, so security tracking is provided by the container health index on the customer portal [1]. Additionally there is no impact from this issue on Quay 3.3 and 3.2 because they don't use nodejs as a HTTP server. [1] https://catalog.redhat.com/software/containers/quay/quay-rhel8/600e03aadd19c7786c43ae49?container-tabs=security

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-400 · Uncontrolled Resource Consumption