{"id":"UBUNTU-CVE-2019-9512","details":"Some HTTP/2 implementations are vulnerable to ping floods, potentially leading to a denial of service. The attacker sends continual pings to an HTTP/2 peer, causing the peer to build an internal queue of responses. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.","modified":"2026-02-04T02:54:36.838802Z","published":"2019-08-13T00:00:00Z","related":["USN-4308-1","USN-4866-1"],"upstream":["CVE-2019-9512"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-9512"},{"type":"REPORT","url":"https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.md"},{"type":"REPORT","url":"https://netty.io/news/2019/08/13/4-1-39-Final.html"},{"type":"REPORT","url":"http://blog.kazuhooku.com/2019/08/h2o-version-226-230-beta2-released.html"},{"type":"REPORT","url":"https://github.com/netty/netty/pull/9460"},{"type":"REPORT","url":"https://labs.twistedmatrix.com/2019/11/twisted-19100-released.html"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4308-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4866-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2019-9512"}],"affected":[{"package":{"name":"golang-1.10","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/golang-1.10@1.10.4-2ubuntu1~14.04.1?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10.4-2ubuntu1~14.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-1.10","binary_version":"1.10.4-2ubuntu1~14.04.1"},{"binary_name":"golang-1.10-go","binary_version":"1.10.4-2ubuntu1~14.04.1"},{"binary_name":"golang-1.10-src","binary_version":"1.10.4-2ubuntu1~14.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-9512.json"}},{"package":{"name":"golang-1.10","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/golang-1.10@1.10.4-2ubuntu1~16.04.2?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10.4-2ubuntu1~16.04.1","1.10.4-2ubuntu1~16.04.2"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-1.10","binary_version":"1.10.4-2ubuntu1~16.04.2"},{"binary_name":"golang-1.10-go","binary_version":"1.10.4-2ubuntu1~16.04.2"},{"binary_name":"golang-1.10-src","binary_version":"1.10.4-2ubuntu1~16.04.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-9512.json"}},{"package":{"name":"golang-1.6","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/golang-1.6@1.6.2-0ubuntu5~16.04.4?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6-0ubuntu1","1.6-0ubuntu2","1.6-0ubuntu3","1.6-0ubuntu4","1.6-0ubuntu5","1.6.1-0ubuntu1","1.6.2-0ubuntu5~16.04","1.6.2-0ubuntu5~16.04.2","1.6.2-0ubuntu5~16.04.3","1.6.2-0ubuntu5~16.04.4"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-1.6","binary_version":"1.6.2-0ubuntu5~16.04.4"},{"binary_name":"golang-1.6-go","binary_version":"1.6.2-0ubuntu5~16.04.4"},{"binary_name":"golang-1.6-src","binary_version":"1.6.2-0ubuntu5~16.04.4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-9512.json"}},{"package":{"name":"trafficserver","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/trafficserver@5.3.0-2ubuntu2?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.3.0-2ubuntu1","5.3.0-2ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_name":"trafficserver","binary_version":"5.3.0-2ubuntu2"},{"binary_name":"trafficserver-dev","binary_version":"5.3.0-2ubuntu2"},{"binary_name":"trafficserver-experimental-plugins","binary_version":"5.3.0-2ubuntu2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-9512.json"}},{"package":{"name":"twisted","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/twisted@17.9.0-2ubuntu0.1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"17.9.0-2ubuntu0.1"}]}],"versions":["16.6.0-2ubuntu3","17.9.0-1","17.9.0-2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"python-twisted","binary_version":"17.9.0-2ubuntu0.1"},{"binary_name":"python-twisted-bin","binary_version":"17.9.0-2ubuntu0.1"},{"binary_name":"python-twisted-conch","binary_version":"1:17.9.0-2ubuntu0.1"},{"binary_name":"python-twisted-core","binary_version":"17.9.0-2ubuntu0.1"},{"binary_name":"python-twisted-mail","binary_version":"17.9.0-2ubuntu0.1"},{"binary_name":"python-twisted-names","binary_version":"17.9.0-2ubuntu0.1"},{"binary_name":"python-twisted-news","binary_version":"17.9.0-2ubuntu0.1"},{"binary_name":"python-twisted-runner","binary_version":"17.9.0-2ubuntu0.1"},{"binary_name":"python-twisted-web","binary_version":"17.9.0-2ubuntu0.1"},{"binary_name":"python-twisted-words","binary_version":"17.9.0-2ubuntu0.1"},{"binary_name":"python3-twisted","binary_version":"17.9.0-2ubuntu0.1"},{"binary_name":"python3-twisted-bin","binary_version":"17.9.0-2ubuntu0.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-9512.json"}},{"package":{"name":"golang-1.10","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/golang-1.10@1.10.4-2ubuntu1~18.04.2?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10~rc1-1","1.10~rc1-1ubuntu1","1.10~rc1-2ubuntu1","1.10~rc2-1ubuntu1","1.10-1ubuntu1","1.10.1-1ubuntu2","1.10.4-2ubuntu1~18.04.1","1.10.4-2ubuntu1~18.04.2"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-1.10","binary_version":"1.10.4-2ubuntu1~18.04.2"},{"binary_name":"golang-1.10-go","binary_version":"1.10.4-2ubuntu1~18.04.2"},{"binary_name":"golang-1.10-src","binary_version":"1.10.4-2ubuntu1~18.04.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-9512.json"}},{"package":{"name":"golang-1.8","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/golang-1.8@1.8.3-2ubuntu1.18.04.1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.8.3-2ubuntu1","1.8.3-2ubuntu1.18.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-1.8","binary_version":"1.8.3-2ubuntu1.18.04.1"},{"binary_name":"golang-1.8-go","binary_version":"1.8.3-2ubuntu1.18.04.1"},{"binary_name":"golang-1.8-go-shared-dev","binary_version":"1.8.3-2ubuntu1.18.04.1"},{"binary_name":"golang-1.8-src","binary_version":"1.8.3-2ubuntu1.18.04.1"},{"binary_name":"libgolang-1.8-std1","binary_version":"1.8.3-2ubuntu1.18.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-9512.json"}},{"package":{"name":"golang-1.9","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/golang-1.9@1.9.4-1ubuntu1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.9.1-2ubuntu1","1.9.2-1ubuntu1","1.9.2-3ubuntu1","1.9.3-1ubuntu1","1.9.4-1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-1.9","binary_version":"1.9.4-1ubuntu1"},{"binary_name":"golang-1.9-go","binary_version":"1.9.4-1ubuntu1"},{"binary_name":"golang-1.9-src","binary_version":"1.9.4-1ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-9512.json"}},{"package":{"name":"h2o","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/h2o@2.2.4+dfsg-1ubuntu0.1~esm2?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.3+dfsg-2","2.2.4+dfsg-1","2.2.4+dfsg-1build1","2.2.4+dfsg-1ubuntu0.1~esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"h2o","binary_version":"2.2.4+dfsg-1ubuntu0.1~esm2"},{"binary_name":"libh2o-dev","binary_version":"2.2.4+dfsg-1ubuntu0.1~esm2"},{"binary_name":"libh2o-dev-common","binary_version":"2.2.4+dfsg-1ubuntu0.1~esm2"},{"binary_name":"libh2o-evloop-dev","binary_version":"2.2.4+dfsg-1ubuntu0.1~esm2"},{"binary_name":"libh2o-evloop0.13","binary_version":"2.2.4+dfsg-1ubuntu0.1~esm2"},{"binary_name":"libh2o0.13","binary_version":"2.2.4+dfsg-1ubuntu0.1~esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-9512.json"}},{"package":{"name":"netty","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/netty@1:4.1.7-4ubuntu0.1+esm1?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:4.1.7-4ubuntu0.1+esm1"}]}],"versions":["1:4.1.7-4","1:4.1.7-4ubuntu0.1~esm1","1:4.1.7-4ubuntu0.1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"libnetty-java","binary_version":"1:4.1.7-4ubuntu0.1+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-9512.json"}},{"package":{"name":"trafficserver","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/trafficserver@7.1.2+ds-3?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["7.0.0-5","7.1.2+ds-2","7.1.2+ds-2build1","7.1.2+ds-3"],"ecosystem_specific":{"binaries":[{"binary_name":"trafficserver","binary_version":"7.1.2+ds-3"},{"binary_name":"trafficserver-dev","binary_version":"7.1.2+ds-3"},{"binary_name":"trafficserver-experimental-plugins","binary_version":"7.1.2+ds-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-9512.json"}},{"package":{"name":"twisted","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/twisted@18.9.0-6ubuntu1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"18.9.0-6ubuntu1"}]}],"versions":["18.9.0-3ubuntu1","18.9.0-5","18.9.0-6","18.9.0-6build1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"python-twisted","binary_version":"18.9.0-6ubuntu1"},{"binary_name":"python-twisted-bin","binary_version":"18.9.0-6ubuntu1"},{"binary_name":"python-twisted-conch","binary_version":"1:18.9.0-6ubuntu1"},{"binary_name":"python-twisted-core","binary_version":"18.9.0-6ubuntu1"},{"binary_name":"python-twisted-mail","binary_version":"18.9.0-6ubuntu1"},{"binary_name":"python-twisted-names","binary_version":"18.9.0-6ubuntu1"},{"binary_name":"python-twisted-news","binary_version":"18.9.0-6ubuntu1"},{"binary_name":"python-twisted-runner","binary_version":"18.9.0-6ubuntu1"},{"binary_name":"python-twisted-web","binary_version":"18.9.0-6ubuntu1"},{"binary_name":"python-twisted-words","binary_version":"18.9.0-6ubuntu1"},{"binary_name":"python3-twisted","binary_version":"18.9.0-6ubuntu1"},{"binary_name":"python3-twisted-bin","binary_version":"18.9.0-6ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-9512.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"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"}]}