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HIGH

tomcat: Apache Tomcat HTTP/2 DoS

Published Apr 10, 2019

Description

The HTTP/2 implementation in Apache Tomcat 9.0.0.M1 to 9.0.14 and 8.5.0 to 8.5.37 accepted streams with excessive numbers of SETTINGS frames and also permitted clients to keep streams open without reading/writing request/response data. By keeping streams open for requests that utilised the Servlet API's blocking I/O, clients were able to cause server-side threads to block eventually leading to thread exhaustion and a DoS.

Affected products

Remediation

Red Hat statement

pki-servlet-container does not use HTTP/2 in its default configuration.

Metrics

References (63)

Change history (0)

No recorded changes yet.

Sources
CVE.org / MITRE
Status PUBLISHED
Assigner apache
Published Apr 10, 2019
Updated Aug 4, 2024
Reserved Nov 14, 2018
NVD
Status Modified
Modified Jun 17, 2026
Red Hat
Severity Important
Public date Mar 25, 2019
GHSA-QCXH-W3J9-58QR