{"id":"UBUNTU-CVE-2019-16869","details":"Netty before 4.1.42.Final mishandles whitespace before the colon in HTTP headers (such as a \"Transfer-Encoding : chunked\" line), which leads to HTTP request smuggling.","modified":"2026-02-04T02:13:16.910960Z","published":"2019-09-26T16:15:00Z","related":["USN-4532-1","USN-4600-1"],"upstream":["CVE-2019-16869"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-16869"},{"type":"REPORT","url":"https://github.com/netty/netty/compare/netty-4.1.41.Final...netty-4.1.42.Final"},{"type":"REPORT","url":"https://github.com/netty/netty/issues/9571"},{"type":"REPORT","url":"https://github.com/netty/netty/commit/39cafcb05c99f2aa9fce7e6597664c9ed6a63a95"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4532-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4600-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2019-16869"}],"affected":[{"package":{"name":"netty","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/netty@1:3.2.6.Final-2+deb8u2build0.14.04.1~esm1?arch=source&distro=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:3.2.6.Final-2+deb8u2build0.14.04.1~esm1"}]}],"versions":["1:3.2.6.Final-2"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_version":"1:3.2.6.Final-2+deb8u2build0.14.04.1~esm1","binary_name":"libnetty-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-16869.json"}},{"package":{"name":"netty-3.9","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/netty-3.9@3.9.0.Final-1ubuntu0.1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.9.0.Final-1ubuntu0.1"}]}],"versions":["3.9.0.Final-1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"3.9.0.Final-1ubuntu0.1","binary_name":"libnetty-3.9-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-16869.json"}},{"package":{"name":"netty","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/netty@1:4.0.34-1ubuntu0.1~esm3?arch=source&distro=esm-apps/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:3.2.6.Final-2","1:4.0.32-1","1:4.0.33-1","1:4.0.34-1","1:4.0.34-1ubuntu0.1~esm1","1:4.0.34-1ubuntu0.1~esm2","1:4.0.34-1ubuntu0.1~esm3"],"ecosystem_specific":{"binaries":[{"binary_version":"1:4.0.34-1ubuntu0.1~esm3","binary_name":"libnetty-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-16869.json"}},{"package":{"name":"netty-3.9","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/netty-3.9@3.9.9.Final-1+deb9u1build0.18.04.1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.9.9.Final-1+deb9u1build0.18.04.1"}]}],"versions":["3.9.9.Final-1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"3.9.9.Final-1+deb9u1build0.18.04.1","binary_name":"libnetty-3.9-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-16869.json"}},{"package":{"name":"netty","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/netty@1:4.1.7-4ubuntu0.1+esm5?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:4.1.7-4","1:4.1.7-4ubuntu0.1~esm1","1:4.1.7-4ubuntu0.1","1:4.1.7-4ubuntu0.1+esm1","1:4.1.7-4ubuntu0.1+esm2","1:4.1.7-4ubuntu0.1+esm3","1:4.1.7-4ubuntu0.1+esm4","1:4.1.7-4ubuntu0.1+esm5"],"ecosystem_specific":{"binaries":[{"binary_version":"1:4.1.7-4ubuntu0.1+esm5","binary_name":"libnetty-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-16869.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:H/A:N"},{"type":"Ubuntu","score":"medium"}]}