{"id":"UBUNTU-CVE-2020-24994","details":"Stack overflow in the parse_tag function in libass/ass_parse.c in libass before 0.15.0 allows remote attackers to cause a denial of service or remote code execution via a crafted file.","modified":"2026-04-22T12:35:07.799471Z","published":"2021-03-23T20:15:00Z","related":["USN-4797-1"],"upstream":["CVE-2020-24994"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-24994"},{"type":"REPORT","url":"https://github.com/libass/libass/issues/422"},{"type":"REPORT","url":"https://github.com/libass/libass/issues/423"},{"type":"REPORT","url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=4892"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4797-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-24994"}],"affected":[{"package":{"name":"libass","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/libass@0.10.1-3ubuntu1+esm1?arch=source&distro=esm-infra-legacy/trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.10.1-1ubuntu1","0.10.1-3","0.10.1-3ubuntu1","0.10.1-3ubuntu1+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libass4","binary_version":"0.10.1-3ubuntu1+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-24994.json"}},{"package":{"name":"libass","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/libass@0.13.1-1ubuntu0.1~esm2?arch=source&distro=esm-apps/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.13.1-1ubuntu0.1~esm2"}]}],"versions":["0.12.3-2","0.13.0-1","0.13.1-1","0.13.1-1ubuntu0.1~esm1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"libass5","binary_version":"0.13.1-1ubuntu0.1~esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-24994.json"}},{"package":{"name":"libass","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/libass@1:0.14.0-1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:0.13.7-2","1:0.14.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libass9","binary_version":"1:0.14.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-24994.json"}},{"package":{"name":"libass","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libass@1:0.14.0-2?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:0.14.0-2"],"ecosystem_specific":{"binaries":[{"binary_version":"1:0.14.0-2","binary_name":"libass9"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-24994.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}