Date: Tue, 14 Jul 2020 13:24:45 +0100 From: Mark Thomas <markt@...che.org> To: oss-security@...ts.openwall.com Subject: [SECURITY] CVE-2020-13934 Apache Tomcat HTTP/2 Denial of Service CVE-2020-13934 Apache Tomcat HTTP/2 Denial of Service Severity: Moderate Vendor: The Apache Software Foundation Versions Affected: Apache Tomcat 10.0.0-M1 to 10.0.0-M6 Apache Tomcat 9.0.0.M5 to 9.0.36 Apache Tomcat 8.5.1 to 8.5.56 Description: An h2c direct connection did not release the HTTP/1.1 processor after the upgrade to HTTP/2. If a sufficient number of such requests were made, an OutOfMemoryException could occur leading to a denial of service. Mitigation: - Upgrade to Apache Tomcat 10.0.0-M7 or later - Upgrade to Apache Tomcat 9.0.37 or later - Upgrade to Apache Tomcat 8.5.57 or later Credit: This issue was reported publicly via the Apache Tomcat Users mailing list without reference to the potential for DoS. The DoS risks were identified by the Apache Tomcat Security Team. References:  http://tomcat.apache.org/security-10.html  http://tomcat.apache.org/security-9.html  http://tomcat.apache.org/security-8.html
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