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Mageia: 2020-0331 Moderate: Tomcat HTTP/2 Server Unresponsiveness

A specially crafted sequence of HTTP/2 requests 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 (CVE-2020-11996). . MGASA-2020-0331 - Updated tomcat packages fix security vulnerability Publication date: 18 Aug 2020 URL: https://advisories.mageia.org/MGASA-2020-0331.html Type: security Affected Mageia releases: 7 CVE: CVE-2020-11996, CVE-2020-13934, CVE-2020-13935 A specially crafted sequence of HTTP/2 requests 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 (CVE-2020-11996). 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 (CVE-2020-13934). The payload length in a WebSocket frame was not correctly validated. Invalid payload lengths could trigger an infinite loop. Multiple requests with invalid payload lengths could lead to a denial of service (CVE-2020-13935). References: - https://bugs.mageia.org/show_bug.cgi?id=26862 - https://tomcat.apache.org/security-9.html - https://tomcat.apache.org/security-9.html - https://www.cve.org/CVERecord?id=CVE-2020-11996 - https://www.cve.org/CVERecord?id=CVE-2020-13934 - https://www.cve.org/CVERecord?id=CVE-2020-13935 SRPMS: - 7/core/tomcat-9.0.37-1.2.mga7 . Recent Apache Tomcat security patches for Mageia improve safeguards against excessive CPU loads and possible server downtime.. HTTP2 Security, Tomcat Update, Mageia Advisory. . Severity: Important. LinuxSecurity.com Team

Aug 18, 2020 •Important Mageia