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CVE-2020-11996

Status Candidate

Overview

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.

Related Files

Red Hat Security Advisory 2020-5388-01
Posted Jan 7, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-5388-01 - Red Hat support for Spring Boot provides an application platform that reduces the complexity of developing and operating applications for OpenShift as a containerized platform. This release of Red Hat support for Spring Boot 2.2.11 serves as a replacement for Red Hat support for Spring Boot 2.2.10, and includes security and bug fixes and enhancements. For more information, see the release notes listed in the References section. Issues addressed include denial of service and remote SQL injection vulnerabilities.

tags | advisory, remote, denial of service, vulnerability, sql injection
systems | linux, redhat
advisories | CVE-2020-11996, CVE-2020-25638
MD5 | b3bdc25df3f101e501f013f1465ac1d3
Red Hat Security Advisory 2020-5170-01
Posted Nov 23, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-5170-01 - Red Hat JBoss Web Server is a fully integrated and certified set of components for hosting Java web applications. It is comprised of the Apache Tomcat Servlet container, JBoss HTTP Connector, the PicketLink Vault extension for Apache Tomcat, and the Tomcat Native library. This release of Red Hat JBoss Web Server 5.4 serves as a replacement for Red Hat JBoss Web Server 5.3, and includes bug fixes, enhancements, and component upgrades, which are documented in the Release Notes, linked to in the References. Issues addressed include a denial of service vulnerability.

tags | advisory, java, web, denial of service
systems | linux, redhat
advisories | CVE-2020-11996
MD5 | b5085307d40df3ae3d9275ccf7a3969a
Red Hat Security Advisory 2020-5173-01
Posted Nov 23, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-5173-01 - Red Hat JBoss Web Server is a fully integrated and certified set of components for hosting Java web applications. It is comprised of the Apache Tomcat Servlet container, JBoss HTTP Connector, the PicketLink Vault extension for Apache Tomcat, and the Tomcat Native library. This release of Red Hat JBoss Web Server 5.4 serves as a replacement for Red Hat JBoss Web Server 5.3, and includes bug fixes, enhancements, and component upgrades, which are documented in the Release Notes, linked to in the References. Issues addressed include a denial of service vulnerability.

tags | advisory, java, web, denial of service
systems | linux, redhat
advisories | CVE-2020-11996
MD5 | c72ffe222101389c1405d5d32712cb6b
Ubuntu Security Notice USN-4596-1
Posted Oct 21, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4596-1 - It was discovered that Tomcat did not properly manage HTTP/2 streams. An attacker could possibly use this to cause Tomcat to consume resources, resulting in a denial of service. It was discovered that Tomcat did not properly release the HTTP/1.1 processor after the upgrade to HTTP/2. An attacker could possibly use this to generate an OutOfMemoryException, resulting in a denial of service. Various other issues were also addressed.

tags | advisory, web, denial of service
systems | linux, ubuntu
advisories | CVE-2020-11996, CVE-2020-13934, CVE-2020-13935, CVE-2020-9484
MD5 | 9c7bf230e29a045c5b7a3d87aa96b325
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