{"id":"UBUNTU-CVE-2018-19052","details":"An issue was discovered in mod_alias_physical_handler in mod_alias.c in lighttpd before 1.4.50. There is potential ../ path traversal of a single directory above an alias target, with a specific mod_alias configuration where the matched alias lacks a trailing '/' character, but the alias target filesystem path does have a trailing '/' character.","modified":"2026-02-04T03:35:49.118104Z","published":"2018-11-07T05:29:00Z","related":["USN-4775-1"],"upstream":["CVE-2018-19052"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-19052"},{"type":"REPORT","url":"https://github.com/lighttpd/lighttpd1.4/commit/2105dae0f9d7a964375ce681e53cb165375f84c1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4775-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-19052"}],"affected":[{"package":{"name":"lighttpd","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/lighttpd@1.4.33-1+nmu2ubuntu2.1+esm1?arch=source&distro=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.33-1+nmu2ubuntu2.1+esm1"}]}],"versions":["1.4.31-3ubuntu3","1.4.33-1ubuntu1","1.4.33-1+nmu2ubuntu1","1.4.33-1+nmu2ubuntu2","1.4.33-1+nmu2ubuntu2.1"],"ecosystem_specific":{"binaries":[{"binary_name":"lighttpd","binary_version":"1.4.33-1+nmu2ubuntu2.1+esm1"},{"binary_name":"lighttpd-dev","binary_version":"1.4.33-1+nmu2ubuntu2.1+esm1"},{"binary_name":"lighttpd-mod-cml","binary_version":"1.4.33-1+nmu2ubuntu2.1+esm1"},{"binary_name":"lighttpd-mod-magnet","binary_version":"1.4.33-1+nmu2ubuntu2.1+esm1"},{"binary_name":"lighttpd-mod-mysql-vhost","binary_version":"1.4.33-1+nmu2ubuntu2.1+esm1"},{"binary_name":"lighttpd-mod-trigger-b4-dl","binary_version":"1.4.33-1+nmu2ubuntu2.1+esm1"},{"binary_name":"lighttpd-mod-webdav","binary_version":"1.4.33-1+nmu2ubuntu2.1+esm1"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-19052.json"}},{"package":{"name":"lighttpd","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/lighttpd@1.4.35-4ubuntu2.1+esm1?arch=source&distro=esm-apps/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.35-4ubuntu2.1+esm1"}]}],"versions":["1.4.35-4ubuntu1","1.4.35-4ubuntu2","1.4.35-4ubuntu2.1"],"ecosystem_specific":{"binaries":[{"binary_name":"lighttpd","binary_version":"1.4.35-4ubuntu2.1+esm1"},{"binary_name":"lighttpd-dev","binary_version":"1.4.35-4ubuntu2.1+esm1"},{"binary_name":"lighttpd-mod-cml","binary_version":"1.4.35-4ubuntu2.1+esm1"},{"binary_name":"lighttpd-mod-magnet","binary_version":"1.4.35-4ubuntu2.1+esm1"},{"binary_name":"lighttpd-mod-mysql-vhost","binary_version":"1.4.35-4ubuntu2.1+esm1"},{"binary_name":"lighttpd-mod-trigger-b4-dl","binary_version":"1.4.35-4ubuntu2.1+esm1"},{"binary_name":"lighttpd-mod-webdav","binary_version":"1.4.35-4ubuntu2.1+esm1"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-19052.json"}},{"package":{"name":"lighttpd","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/lighttpd@1.4.45-1ubuntu3.18.04.1+esm1?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.45-1ubuntu3.18.04.1+esm1"}]}],"versions":["1.4.45-1ubuntu1","1.4.45-1ubuntu3","1.4.45-1ubuntu3+esm1","1.4.45-1ubuntu3.18.04","1.4.45-1ubuntu3.18.04+esm1","1.4.45-1ubuntu3.18.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"lighttpd","binary_version":"1.4.45-1ubuntu3.18.04.1+esm1"},{"binary_name":"lighttpd-dev","binary_version":"1.4.45-1ubuntu3.18.04.1+esm1"},{"binary_name":"lighttpd-mod-authn-gssapi","binary_version":"1.4.45-1ubuntu3.18.04.1+esm1"},{"binary_name":"lighttpd-mod-authn-ldap","binary_version":"1.4.45-1ubuntu3.18.04.1+esm1"},{"binary_name":"lighttpd-mod-authn-mysql","binary_version":"1.4.45-1ubuntu3.18.04.1+esm1"},{"binary_name":"lighttpd-mod-cml","binary_version":"1.4.45-1ubuntu3.18.04.1+esm1"},{"binary_name":"lighttpd-mod-geoip","binary_version":"1.4.45-1ubuntu3.18.04.1+esm1"},{"binary_name":"lighttpd-mod-magnet","binary_version":"1.4.45-1ubuntu3.18.04.1+esm1"},{"binary_name":"lighttpd-mod-mysql-vhost","binary_version":"1.4.45-1ubuntu3.18.04.1+esm1"},{"binary_name":"lighttpd-mod-trigger-b4-dl","binary_version":"1.4.45-1ubuntu3.18.04.1+esm1"},{"binary_name":"lighttpd-mod-webdav","binary_version":"1.4.45-1ubuntu3.18.04.1+esm1"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-19052.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:H/I:N/A:N"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"low"}]}