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.
Remediation
References
Related Vulnerabilities
Magento Improper Input Validation Vulnerability (CVE-2022-42344)
Perl Improper Input Validation Vulnerability (CVE-2016-2381)
RubyGems Deserialization of Untrusted Data Vulnerability (CVE-2017-0903)
WordPress Plugin 123ContactForm for WordPress Multiple Vulnerabilities (1.5.6)
Liferay Portal Incorrect Authorization Vulnerability (CVE-2021-33335)