{"id":"USN-7368-1","summary":"snakeyaml vulnerability","details":"It was discovered that SnakeYAML incorrectly handled recursive\nentity references. An attacker could possibly use this issue to\ncause SnakeYAML to crash, resulting in a denial of service.\n","modified":"2026-06-25T13:33:09.783841424Z","published":"2025-03-27T16:01:29Z","related":["UBUNTU-CVE-2017-18640"],"upstream":["CVE-2017-18640","UBUNTU-CVE-2017-18640"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7368-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2017-18640"}],"affected":[{"package":{"name":"snakeyaml","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/snakeyaml?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.12-2ubuntu0.14.04.1~esm2"}]}],"versions":["1.12-2","1.12-2ubuntu0.14.04.1~esm1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro","binaries":[{"binary_name":"libyaml-snake-java","binary_version":"1.12-2ubuntu0.14.04.1~esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7368-1.json","cves_map":{"cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2017-18640"}],"ecosystem":"Ubuntu:Pro:14.04:LTS"}}},{"package":{"name":"snakeyaml","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/snakeyaml?arch=source&distro=esm-apps%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.12-2ubuntu0.16.04.1~esm2"}]}],"versions":["1.12-2","1.12-2ubuntu0.16.04.1~esm1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"libyaml-snake-java","binary_version":"1.12-2ubuntu0.16.04.1~esm2"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:16.04:LTS","cves":[{"id":"CVE-2017-18640","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7368-1.json"}},{"package":{"name":"snakeyaml","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/snakeyaml?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.23-1+deb10u1ubuntu0.1~esm1"}]}],"versions":["1.17-1","1.19-1","1.20-1","1.23-1~18.04","1.23-1+deb10u1build0.18.04.1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_version":"1.23-1+deb10u1ubuntu0.1~esm1","binary_name":"libyaml-snake-java"}]},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2017-18640","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:Pro:18.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7368-1.json"}},{"package":{"name":"snakeyaml","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/snakeyaml?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.25+ds-2ubuntu0.1+esm1"}]}],"versions":["1.23-1","1.25+ds-2","1.25+ds-2ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libyaml-snake-java","binary_version":"1.25+ds-2ubuntu0.1+esm1"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:20.04:LTS","cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2017-18640"}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7368-1.json"}}],"schema_version":"1.7.5"}