{"id":"UBUNTU-CVE-2019-0197","details":"A vulnerability was found in Apache HTTP Server 2.4.34 to 2.4.38. When HTTP/2 was enabled for a http: host or H2Upgrade was enabled for h2 on a https: host, an Upgrade request from http/1.1 to http/2 that was not the first request on a connection could lead to a misconfiguration and crash. Server that never enabled the h2 protocol or that only enabled it for https: and did not set \"H2Upgrade on\" are unaffected by this issue.","modified":"2026-04-22T13:24:20.945561Z","published":"2019-06-11T00:00:00Z","related":["USN-4113-1"],"upstream":["CVE-2019-0197"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-0197"},{"type":"REPORT","url":"https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2019-0197"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4113-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2019-0197"}],"affected":[{"package":{"name":"apache2","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/apache2@2.4.29-1ubuntu4.10?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.29-1ubuntu4.10"}]}],"versions":["2.4.27-2ubuntu3","2.4.29-1ubuntu1","2.4.29-1ubuntu2","2.4.29-1ubuntu3","2.4.29-1ubuntu4","2.4.29-1ubuntu4.1","2.4.29-1ubuntu4.2","2.4.29-1ubuntu4.3","2.4.29-1ubuntu4.4","2.4.29-1ubuntu4.5","2.4.29-1ubuntu4.6","2.4.29-1ubuntu4.7","2.4.29-1ubuntu4.8"],"ecosystem_specific":{"binaries":[{"binary_version":"2.4.29-1ubuntu4.10","binary_name":"apache2"},{"binary_version":"2.4.29-1ubuntu4.10","binary_name":"apache2-bin"},{"binary_version":"2.4.29-1ubuntu4.10","binary_name":"apache2-data"},{"binary_version":"2.4.29-1ubuntu4.10","binary_name":"apache2-suexec-custom"},{"binary_version":"2.4.29-1ubuntu4.10","binary_name":"apache2-suexec-pristine"},{"binary_version":"2.4.29-1ubuntu4.10","binary_name":"apache2-utils"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-0197.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L"},{"type":"Ubuntu","score":"low"}]}