{"id":"UBUNTU-CVE-2021-20201","details":"A flaw was found in spice in versions before 0.14.92. A DoS tool might make it easier for remote attackers to cause a denial of service (CPU consumption) by performing many renegotiations within a single connection.","modified":"2026-04-22T14:32:19.474585Z","published":"2021-05-28T11:15:00Z","upstream":["CVE-2021-20201"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-20201"},{"type":"REPORT","url":"https://blog.qualys.com/product-tech/2011/10/31/tls-renegotiation-and-denial-of-service-attacks"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-20201"}],"affected":[{"package":{"name":"spice","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/spice@0.12.4-0nocelt2ubuntu1.8+esm1?arch=source&distro=esm-infra-legacy/trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.12.4-0nocelt1","0.12.4-0nocelt1.1","0.12.4-0nocelt1.1ubuntu1","0.12.4-0nocelt2","0.12.4-0nocelt2ubuntu1","0.12.4-0nocelt2ubuntu1.1","0.12.4-0nocelt2ubuntu1.2","0.12.4-0nocelt2ubuntu1.3","0.12.4-0nocelt2ubuntu1.4","0.12.4-0nocelt2ubuntu1.5","0.12.4-0nocelt2ubuntu1.6","0.12.4-0nocelt2ubuntu1.7","0.12.4-0nocelt2ubuntu1.8","0.12.4-0nocelt2ubuntu1.8+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libspice-server1","binary_version":"0.12.4-0nocelt2ubuntu1.8+esm1"},{"binary_name":"spice-client","binary_version":"0.12.4-0nocelt2ubuntu1.8+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-20201.json"}},{"package":{"name":"spice","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/spice@0.12.6-4ubuntu0.5?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.12.5-1.1ubuntu2","0.12.6-4","0.12.6-4ubuntu0.1","0.12.6-4ubuntu0.2","0.12.6-4ubuntu0.3","0.12.6-4ubuntu0.4","0.12.6-4ubuntu0.5"],"ecosystem_specific":{"binaries":[{"binary_name":"libspice-server1","binary_version":"0.12.6-4ubuntu0.5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-20201.json"}},{"package":{"name":"spice","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/spice@0.14.0-1ubuntu2.5?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.12.8-2.2","0.14.0-1","0.14.0-1ubuntu1","0.14.0-1ubuntu2","0.14.0-1ubuntu2.1","0.14.0-1ubuntu2.2","0.14.0-1ubuntu2.4","0.14.0-1ubuntu2.5"],"ecosystem_specific":{"binaries":[{"binary_version":"0.14.0-1ubuntu2.5","binary_name":"libspice-server1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-20201.json"}},{"package":{"name":"spice","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/spice@0.14.2-4ubuntu3.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.14.2-0ubuntu2","0.14.2-4ubuntu1","0.14.2-4ubuntu2","0.14.2-4ubuntu3","0.14.2-4ubuntu3.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libspice-server1","binary_version":"0.14.2-4ubuntu3.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-20201.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"low"}]}