{"id":"UBUNTU-CVE-2018-20821","details":"The parsing component in LibSass through 3.5.5 allows attackers to cause a denial-of-service (uncontrolled recursion in Sass::Parser::parse_css_variable_value in parser.cpp).","modified":"2025-07-16T07:52:25.574205Z","published":"2019-04-23T14:29:00Z","withdrawn":"2025-07-18T16:44:51Z","upstream":["CVE-2018-20821"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-20821"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-20821"}],"affected":[{"package":{"name":"libsass","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libsass@3.6.3-1ubuntu1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6.3-1ubuntu1"}]}],"versions":["3.5.5-4"],"ecosystem_specific":{"binaries":[{"binary_name":"libsass-dev","binary_version":"3.6.3-1ubuntu1"},{"binary_name":"libsass1","binary_version":"3.6.3-1ubuntu1"},{"binary_name":"libsass1-dbgsym","binary_version":"3.6.3-1ubuntu1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-20821.json"}},{"package":{"name":"libsass","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libsass@3.6.5-1ubuntu1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6.5-1ubuntu1"}]}],"ecosystem_specific":{"binaries":[{"binary_name":"libsass-dev","binary_version":"3.6.5-1ubuntu1"},{"binary_name":"libsass1","binary_version":"3.6.5-1ubuntu1"},{"binary_name":"libsass1-dbgsym","binary_version":"3.6.5-1ubuntu1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-20821.json"}},{"package":{"name":"libsass","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libsass@3.6.5+20231221-3?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6.5+20231221-3"}]}],"versions":["3.6.5+20220909-1ubuntu1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libsass-dev","binary_version":"3.6.5+20231221-3"},{"binary_name":"libsass1","binary_version":"3.6.5+20231221-3"},{"binary_name":"libsass1-dbgsym","binary_version":"3.6.5+20231221-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-20821.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},{"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"}]}