{"id":"UBUNTU-CVE-2017-12165","details":"It was discovered that Undertow before 1.4.17, 1.3.31 and 2.0.0 processes http request headers with unusual whitespaces which can cause possible http request smuggling.","modified":"2026-04-02T18:08:41.524908Z","published":"2018-07-27T15:29:00Z","upstream":["CVE-2017-12165"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2017-12165"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1490301"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2017-12165"}],"affected":[{"package":{"name":"undertow","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/undertow@1.3.16-1ubuntu0.1~esm1?arch=source&distro=esm-apps/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.4-1","1.3.5-1","1.3.7-1","1.3.11-1","1.3.16-1","1.3.16-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libundertow-java","binary_version":"1.3.16-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-12165.json"}},{"package":{"name":"undertow","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/undertow@1.4.23-3ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.20-1","1.4.21-1","1.4.22-1","1.4.23-1","1.4.23-2build1","1.4.23-3","1.4.23-3ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libundertow-java","binary_version":"1.4.23-3ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-12165.json"}},{"package":{"name":"undertow","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/undertow@2.0.23-1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.23-1"}]}],"ecosystem_specific":{"binaries":[{"binary_name":"libundertow-java","binary_version":"2.0.23-1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-12165.json"}},{"package":{"name":"undertow","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/undertow@2.3.8-2ubuntu0.1~esm1?arch=source&distro=esm-apps/noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.8-2","2.3.8-2ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libundertow-java","binary_version":"2.3.8-2ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-12165.json"}},{"package":{"name":"undertow","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/undertow@2.3.18-2?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.18-1","2.3.18-2"],"ecosystem_specific":{"binaries":[{"binary_name":"libundertow-java","binary_version":"2.3.18-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-12165.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:N"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]}