{"id":"UBUNTU-CVE-2020-13934","details":"An h2c direct connection to Apache Tomcat 10.0.0-M1 to 10.0.0-M6, 9.0.0.M5 to 9.0.36 and 8.5.1 to 8.5.56 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.","modified":"2026-01-30T01:11:25.915534Z","published":"2020-07-14T15:15:00Z","related":["USN-4596-1"],"upstream":["CVE-2020-13934"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-13934"},{"type":"REPORT","url":"https://www.openwall.com/lists/oss-security/2020/07/14/4"},{"type":"REPORT","url":"https://lists.apache.org/thread.html/r61f411cf82488d6ec213063fc15feeeb88e31b0ca9c29652ee4f962e%40%3Cannounce.tomcat.apache.org%3E"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4596-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-13934"}],"affected":[{"package":{"name":"tomcat8","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/tomcat8@8.5.39-1ubuntu1~18.04.3+esm5?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.5.21-1ubuntu1","8.5.29-1","8.5.30-1","8.5.30-1ubuntu1","8.5.30-1ubuntu1.2","8.5.30-1ubuntu1.3","8.5.30-1ubuntu1.4","8.5.39-1ubuntu1~18.04.1","8.5.39-1ubuntu1~18.04.2","8.5.39-1ubuntu1~18.04.3","8.5.39-1ubuntu1~18.04.3+esm1","8.5.39-1ubuntu1~18.04.3+esm2","8.5.39-1ubuntu1~18.04.3+esm3","8.5.39-1ubuntu1~18.04.3+esm4","8.5.39-1ubuntu1~18.04.3+esm5"],"ecosystem_specific":{"binaries":[{"binary_name":"libtomcat8-embed-java","binary_version":"8.5.39-1ubuntu1~18.04.3+esm5"},{"binary_name":"libtomcat8-java","binary_version":"8.5.39-1ubuntu1~18.04.3+esm5"},{"binary_name":"tomcat8","binary_version":"8.5.39-1ubuntu1~18.04.3+esm5"},{"binary_name":"tomcat8-admin","binary_version":"8.5.39-1ubuntu1~18.04.3+esm5"},{"binary_name":"tomcat8-common","binary_version":"8.5.39-1ubuntu1~18.04.3+esm5"},{"binary_name":"tomcat8-docs","binary_version":"8.5.39-1ubuntu1~18.04.3+esm5"},{"binary_name":"tomcat8-examples","binary_version":"8.5.39-1ubuntu1~18.04.3+esm5"},{"binary_name":"tomcat8-user","binary_version":"8.5.39-1ubuntu1~18.04.3+esm5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-13934.json"}},{"package":{"name":"tomcat9","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/tomcat9@9.0.16-3ubuntu0.18.04.2+esm7?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["9.0.16-3~18.04.1","9.0.16-3ubuntu0.18.04.1","9.0.16-3ubuntu0.18.04.2","9.0.16-3ubuntu0.18.04.2+esm1","9.0.16-3ubuntu0.18.04.2+esm2","9.0.16-3ubuntu0.18.04.2+esm3","9.0.16-3ubuntu0.18.04.2+esm4","9.0.16-3ubuntu0.18.04.2+esm5","9.0.16-3ubuntu0.18.04.2+esm6","9.0.16-3ubuntu0.18.04.2+esm7"],"ecosystem_specific":{"binaries":[{"binary_name":"libtomcat9-embed-java","binary_version":"9.0.16-3ubuntu0.18.04.2+esm7"},{"binary_name":"libtomcat9-java","binary_version":"9.0.16-3ubuntu0.18.04.2+esm7"},{"binary_name":"tomcat9","binary_version":"9.0.16-3ubuntu0.18.04.2+esm7"},{"binary_name":"tomcat9-admin","binary_version":"9.0.16-3ubuntu0.18.04.2+esm7"},{"binary_name":"tomcat9-common","binary_version":"9.0.16-3ubuntu0.18.04.2+esm7"},{"binary_name":"tomcat9-docs","binary_version":"9.0.16-3ubuntu0.18.04.2+esm7"},{"binary_name":"tomcat9-examples","binary_version":"9.0.16-3ubuntu0.18.04.2+esm7"},{"binary_name":"tomcat9-user","binary_version":"9.0.16-3ubuntu0.18.04.2+esm7"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-13934.json"}},{"package":{"name":"tomcat9","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/tomcat9@9.0.31-1ubuntu0.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.0.31-1ubuntu0.1"}]}],"versions":["9.0.24-1","9.0.27-1","9.0.31-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libtomcat9-embed-java","binary_version":"9.0.31-1ubuntu0.1"},{"binary_name":"libtomcat9-java","binary_version":"9.0.31-1ubuntu0.1"},{"binary_name":"tomcat9","binary_version":"9.0.31-1ubuntu0.1"},{"binary_name":"tomcat9-admin","binary_version":"9.0.31-1ubuntu0.1"},{"binary_name":"tomcat9-common","binary_version":"9.0.31-1ubuntu0.1"},{"binary_name":"tomcat9-docs","binary_version":"9.0.31-1ubuntu0.1"},{"binary_name":"tomcat9-examples","binary_version":"9.0.31-1ubuntu0.1"},{"binary_name":"tomcat9-user","binary_version":"9.0.31-1ubuntu0.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-13934.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}