{"id":"UBUNTU-CVE-2019-0816","details":"A security feature bypass exists in Azure SSH Keypairs, due to a change in the provisioning logic for some Linux images that use cloud-init, aka 'Azure SSH Keypairs Security Feature Bypass Vulnerability'.","modified":"2025-07-16T08:23:19.802142Z","published":"2019-04-09T03:29:00Z","upstream":["CVE-2019-0816"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-0816"},{"type":"REPORT","url":"https://support.microsoft.com/en-us/help/4491476/extraneous-ssh-public-keys-added-to-authorized-keys-file-on-linux-vm"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2019-0816"}],"affected":[{"package":{"name":"cloud-init","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/cloud-init@18.5-45-g3554ffe8-0ubuntu1~16.04.1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"18.5-45-g3554ffe8-0ubuntu1~16.04.1"}]}],"versions":["0.7.7~bzr1149-0ubuntu1","0.7.7~bzr1154-0ubuntu1","0.7.7~bzr1155-0ubuntu1","0.7.7~bzr1156-0ubuntu1","0.7.7~bzr1156-0ubuntu2","0.7.7~bzr1160-0ubuntu1","0.7.7~bzr1176-0ubuntu1","0.7.7~bzr1182-0ubuntu1","0.7.7~bzr1189-0ubuntu1","0.7.7~bzr1192-0ubuntu1","0.7.7~bzr1192-0ubuntu2","0.7.7~bzr1200-0ubuntu1","0.7.7~bzr1208-0ubuntu1","0.7.7~bzr1209-0ubuntu1","0.7.7~bzr1212-0ubuntu1","0.7.7~bzr1246-0ubuntu1~16.04.1","0.7.7~bzr1256-0ubuntu1~16.04.1","0.7.8-1-g3705bb5-0ubuntu1~16.04.1","0.7.8-1-g3705bb5-0ubuntu1~16.04.3","0.7.8-49-g9e904bb-0ubuntu1~16.04.1","0.7.8-49-g9e904bb-0ubuntu1~16.04.2","0.7.8-49-g9e904bb-0ubuntu1~16.04.3","0.7.8-49-g9e904bb-0ubuntu1~16.04.4","0.7.9-0ubuntu1~16.04.2","0.7.9-48-g1c795b9-0ubuntu1~16.04.1","0.7.9-90-g61eb03fe-0ubuntu1~16.04.1","0.7.9-113-g513e99e0-0ubuntu1~16.04.1","0.7.9-153-g16a7302f-0ubuntu1~16.04.1","0.7.9-153-g16a7302f-0ubuntu1~16.04.2","0.7.9-233-ge586fe35-0ubuntu1~16.04.1","0.7.9-233-ge586fe35-0ubuntu1~16.04.2","17.1-27-geb292c18-0ubuntu1~16.04.1","17.1-46-g7acc9e68-0ubuntu1~16.04.1","17.2-35-gf576b2a2-0ubuntu1~16.04.2","18.2-4-g05926e48-0ubuntu1~16.04.1","18.2-4-g05926e48-0ubuntu1~16.04.2","18.3-9-g2e62cb8a-0ubuntu1~16.04.2","18.4-0ubuntu1~16.04.2","18.5-21-g8ee294d5-0ubuntu1~16.04.1"],"ecosystem_specific":{"binaries":[{"binary_version":"18.5-45-g3554ffe8-0ubuntu1~16.04.1","binary_name":"cloud-init"},{"binary_version":"18.5-45-g3554ffe8-0ubuntu1~16.04.1","binary_name":"ec2-init"},{"binary_version":"18.5-45-g3554ffe8-0ubuntu1~16.04.1","binary_name":"grub-legacy-ec2"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-0816.json"}},{"package":{"name":"cloud-init","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/cloud-init@18.5-45-g3554ffe8-0ubuntu1~18.04.1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"18.5-45-g3554ffe8-0ubuntu1~18.04.1"}]}],"versions":["17.1-18-gd4f70470-0ubuntu1","17.1-25-g17a15f9e-0ubuntu1~17.10.1","17.1-25-g17a15f9e-0ubuntu1","17.1-27-geb292c18-0ubuntu1","17.1-41-g76243487-0ubuntu1","17.1-46-g7acc9e68-0ubuntu1","17.1-51-g05b2308a-0ubuntu1","17.1-53-ga5dc0f42-0ubuntu1","17.1-58-g703241a3-0ubuntu1","17.1-60-ga30a3bb5-0ubuntu1","17.2-1-g4089e20c-0ubuntu1","17.2-9-gdf24daa8-0ubuntu1","17.2-13-g6299e8d0-0ubuntu1","17.2-20-g32a6a176-0ubuntu1","17.2-25-gc03bdd3d-0ubuntu1","17.2-30-gf7deaf15-0ubuntu1","17.2-34-g644048e3-0ubuntu1","18.1-0ubuntu1","18.1-5-g40e77380-0ubuntu1","18.1-17-g97012fbb-0ubuntu1","18.1-23-gde34dc7c-0ubuntu1","18.1-26-g685f9901-0ubuntu1","18.1-35-ge0f644b7-0ubuntu1","18.1-35-ge0f644b7-0ubuntu2","18.2-0ubuntu1","18.2-4-g05926e48-0ubuntu1","18.2-4-g05926e48-0ubuntu2","18.2-9-g49b562c9-0ubuntu1","18.2-14-g6d48d265-0ubuntu1","18.2-27-g6ef92c98-0ubuntu1~18.04.1","18.3-9-g2e62cb8a-0ubuntu1~18.04.2","18.4-0ubuntu1~18.04.1","18.5-21-g8ee294d5-0ubuntu1~18.04.1"],"ecosystem_specific":{"binaries":[{"binary_version":"18.5-45-g3554ffe8-0ubuntu1~18.04.1","binary_name":"cloud-init"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-0816.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]}