{"id":"UBUNTU-CVE-2018-19797","details":"In LibSass 3.5.5, a NULL Pointer Dereference in the function Sass::Selector_List::populate_extends in SharedPtr.hpp (used by ast.cpp and ast_selectors.cpp) may cause a Denial of Service (application crash) via a crafted sass input file.","modified":"2026-02-04T04:35:55.647469Z","published":"2018-12-03T06:29:00Z","related":["USN-4837-1"],"upstream":["CVE-2018-19797"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-19797"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4837-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-19797"}],"affected":[{"package":{"name":"libsass","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/libsass@3.3.4-1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2.5-1","3.2.5-2","3.3.2-1","3.3.4-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libsass-dev","binary_version":"3.3.4-1"},{"binary_name":"libsass0","binary_version":"3.3.4-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-19797.json"}},{"package":{"name":"libsass","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/libsass@3.4.8-1ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4.8-1ubuntu0.1~esm1"}]}],"versions":["3.4.3-1","3.4.6-1","3.4.8-1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"libsass-dev","binary_version":"3.4.8-1ubuntu0.1~esm1"},{"binary_name":"libsass0","binary_version":"3.4.8-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-19797.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}