{"id":"UBUNTU-CVE-2019-9511","details":"Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization manipulation, potentially leading to a denial of service. The attacker requests a large amount of data from a specified resource over multiple streams. They manipulate window size and stream priority to force the server to queue the data in 1-byte chunks. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.","modified":"2026-04-22T13:55:06.636967Z","published":"2019-08-13T00:00:00Z","related":["USN-4099-1","USN-6754-1"],"upstream":["CVE-2019-9511"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-9511"},{"type":"REPORT","url":"https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.md"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4099-1"},{"type":"REPORT","url":"https://github.com/nodejs/node/pull/29133"},{"type":"REPORT","url":"https://github.com/nodejs/node/pull/29148"},{"type":"REPORT","url":"https://github.com/nodejs/node/pull/29152"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2019-9511"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6754-1"}],"affected":[{"package":{"name":"nodejs","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/nodejs@0.10.25~dfsg2-2ubuntu1.2+esm2?arch=source&distro=esm-infra-legacy/trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.10.15~dfsg1-4","0.10.21~dfsg1-1","0.10.22~dfsg1-2","0.10.23~dfsg1-1","0.10.23~dfsg1-2","0.10.23~dfsg1-3","0.10.24~dfsg1-1","0.10.25~dfsg2-2","0.10.25~dfsg2-2ubuntu1","0.10.25~dfsg2-2ubuntu1.2","0.10.25~dfsg2-2ubuntu1.2+esm1","0.10.25~dfsg2-2ubuntu1.2+esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"nodejs","binary_version":"0.10.25~dfsg2-2ubuntu1.2+esm2"},{"binary_name":"nodejs-legacy","binary_version":"0.10.25~dfsg2-2ubuntu1.2+esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-9511.json"}},{"package":{"name":"nginx","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/nginx@1.10.3-0ubuntu0.16.04.4?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.10.3-0ubuntu0.16.04.4"}]}],"versions":["1.9.3-1ubuntu1","1.9.6-2ubuntu1","1.9.6-2ubuntu2","1.9.9-0ubuntu1","1.9.9-1ubuntu1","1.9.10-0ubuntu1","1.9.10-1ubuntu1","1.9.11-0ubuntu1","1.9.11-0ubuntu2","1.9.12-0ubuntu1","1.9.13-0ubuntu1","1.9.14-0ubuntu1","1.9.15-0ubuntu1","1.10.0-0ubuntu0.16.04.1","1.10.0-0ubuntu0.16.04.2","1.10.0-0ubuntu0.16.04.3","1.10.0-0ubuntu0.16.04.4","1.10.3-0ubuntu0.16.04.1","1.10.3-0ubuntu0.16.04.2","1.10.3-0ubuntu0.16.04.3"],"ecosystem_specific":{"availability":"No 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