{"id":"UBUNTU-CVE-2019-9516","details":"Some HTTP/2 implementations are vulnerable to a header leak, potentially leading to a denial of service. The attacker sends a stream of headers with a 0-length header name and 0-length header value, optionally Huffman encoded into 1-byte or greater headers. Some implementations allocate memory for these headers and keep the allocation alive until the session dies. This can consume excess memory.","modified":"2026-02-04T04:14:24.152828Z","published":"2019-08-13T00:00:00Z","related":["USN-4099-1"],"upstream":["CVE-2019-9516"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-9516"},{"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://www.cve.org/CVERecord?id=CVE-2019-9516"}],"affected":[{"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 subscription required","binaries":[{"binary_version":"1.10.3-0ubuntu0.16.04.4","binary_name":"nginx"},{"binary_version":"1.10.3-0ubuntu0.16.04.4","binary_name":"nginx-common"},{"binary_version":"1.10.3-0ubuntu0.16.04.4","binary_name":"nginx-core"},{"binary_version":"1.10.3-0ubuntu0.16.04.4","binary_name":"nginx-extras"},{"binary_version":"1.10.3-0ubuntu0.16.04.4","binary_name":"nginx-full"},{"binary_version":"1.10.3-0ubuntu0.16.04.4","binary_name":"nginx-light"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-9516.json"}},{"package":{"name":"nginx","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/nginx@1.14.0-0ubuntu1.4?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.14.0-0ubuntu1.4"}]}],"versions":["1.12.1-0ubuntu2","1.13.6-2ubuntu1","1.13.6-2ubuntu2","1.13.10-1ubuntu1","1.13.12-0ubuntu1","1.14.0-0ubuntu1","1.14.0-0ubuntu1.1","1.14.0-0ubuntu1.2","1.14.0-0ubuntu1.3"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1.14.0-0ubuntu1.4","binary_name":"libnginx-mod-http-auth-pam"},{"binary_version":"1.14.0-0ubuntu1.4","binary_name":"libnginx-mod-http-cache-purge"},{"binary_version":"1.14.0-0ubuntu1.4","binary_name":"libnginx-mod-http-dav-ext"},{"binary_version":"1.14.0-0ubuntu1.4","binary_name":"libnginx-mod-http-echo"},{"binary_version":"1.14.0-0ubuntu1.4","binary_name":"libnginx-mod-http-fancyindex"},{"binary_version":"1.14.0-0ubuntu1.4","binary_name":"libnginx-mod-http-geoip"},{"binary_version":"1.14.0-0ubuntu1.4","binary_name":"libnginx-mod-http-headers-more-filter"},{"binary_version":"1.14.0-0ubuntu1.4","binary_name":"libnginx-mod-http-image-filter"},{"binary_version":"1.14.0-0ubuntu1.4","binary_name":"libnginx-mod-http-lua"},{"binary_version":"1.14.0-0ubuntu1.4","binary_name":"libnginx-mod-http-ndk"},{"binary_version":"1.14.0-0ubuntu1.4","binary_name":"libnginx-mod-http-perl"},{"binary_version":"1.14.0-0ubuntu1.4","binary_name":"libnginx-mod-http-subs-filter"},{"binary_version":"1.14.0-0ubuntu1.4","binary_name":"libnginx-mod-http-uploadprogress"},{"binary_version":"1.14.0-0ubuntu1.4","binary_name":"libnginx-mod-http-upstream-fair"},{"binary_version":"1.14.0-0ubuntu1.4","binary_name":"libnginx-mod-http-xslt-filter"},{"binary_version":"1.14.0-0ubuntu1.4","binary_name":"libnginx-mod-mail"},{"binary_version":"1.14.0-0ubuntu1.4","binary_name":"libnginx-mod-nchan"},{"binary_version":"1.14.0-0ubuntu1.4","binary_name":"libnginx-mod-rtmp"},{"binary_version":"1.14.0-0ubuntu1.4","binary_name":"libnginx-mod-stream"},{"binary_version":"1.14.0-0ubuntu1.4","binary_name":"nginx"},{"binary_version":"1.14.0-0ubuntu1.4","binary_name":"nginx-common"},{"binary_version":"1.14.0-0ubuntu1.4","binary_name":"nginx-core"},{"binary_version":"1.14.0-0ubuntu1.4","binary_name":"nginx-extras"},{"binary_version":"1.14.0-0ubuntu1.4","binary_name":"nginx-full"},{"binary_version":"1.14.0-0ubuntu1.4","binary_name":"nginx-light"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-9516.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}