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HIGH

tomcat: specially crafted sequence of HTTP/2 requests can lead to DoS

Published Jun 26, 2020

Description

A specially crafted sequence of HTTP/2 requests sent to Apache Tomcat 10.0.0-M1 to 10.0.0-M5, 9.0.0.M1 to 9.0.35 and 8.5.0 to 8.5.55 could trigger high CPU usage for several seconds. If a sufficient number of such requests were made on concurrent HTTP/2 connections, the server could become unresponsive.

Affected products

Remediation

Red Hat statement

Red Hat OpenStack Platform's OpenDaylight will not be updated for this flaw because it was deprecated as of RHOSP14 and is only receiving security fixes for Important and Critical flaws. Apache Tomcat versions as shipped with Red Hat Enterprise Linux 6 and 7 are not affected by this flaw as it doesn't support HTTP/2 protocol. Red Hat Enterprise Linux 8's Identity Management is using an affected version of Tomcat bundled within PKI servlet engine, however HTTP/2 protocol is not supported by this component. pki-servlet-engine has been obsoleted by Tomcat in Red Hat Enterprise Linux 8.9 and later. Therefore no additional fixes would be made available for the servlet engine.

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References (54)

Change history (0)

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Sources
CVE.org / MITRE
Status PUBLISHED
Assigner apache
Published Jun 26, 2020
Updated Aug 4, 2024
Reserved Apr 21, 2020
NVD
Status Modified
Modified Jun 17, 2026
Red Hat
Severity Moderate
Public date Jun 25, 2020
GHSA-53HP-JPWQ-2JGQ