{"id":"UBUNTU-CVE-2021-3429","details":"When instructing cloud-init to set a random password for a new user account, versions before 21.2 would write that password to the world-readable log file /var/log/cloud-init-output.log. This could allow a local user to log in as another user.","modified":"2025-07-16T07:55:23.334145Z","published":"2023-04-19T22:15:00Z","upstream":["CVE-2021-3429"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-3429"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-3429"}],"affected":[{"package":{"name":"cloud-init","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/cloud-init@21.1-19-gbad84ad4-0ubuntu1~16.04.1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"21.1-19-gbad84ad4-0ubuntu1~16.04.1"}]}],"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","18.5-45-g3554ffe8-0ubuntu1~16.04.1","19.1-1-gbaa47854-0ubuntu1~16.04.1","19.2-24-ge7881d5c-0ubuntu1~16.04.1","19.2-36-g059d049c-0ubuntu1~16.04.1","19.2-36-g059d049c-0ubuntu2~16.04.1","19.3-41-gc4735dd3-0ubuntu1~16.04.1","19.4-33-gbb4131a2-0ubuntu1~16.04.1","20.2-45-g5f7825e2-0ubuntu1~16.04.1","20.3-2-g371b392c-0ubuntu1~16.04.1","20.4-0ubuntu1~16.04.1","20.4-0ubuntu1~16.04.2","20.4.1-0ubuntu1~16.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"cloud-init","binary_version":"21.1-19-gbad84ad4-0ubuntu1~16.04.1"},{"binary_name":"ec2-init","binary_version":"21.1-19-gbad84ad4-0ubuntu1~16.04.1"},{"binary_name":"grub-legacy-ec2","binary_version":"21.1-19-gbad84ad4-0ubuntu1~16.04.1"}],"availability":"No subscription 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