{"schemaVersion":3,"id":"CVE-2021-3429","aliases":["MGASA-2021-0494","RHSA-2021:3081","RHSA-2021:3177","RHSA-2021:3371","UBUNTU-CVE-2021-3429","DEBIAN-CVE-2021-3429","DLA-2601-1"],"status":"published","duplicateOf":null,"title":null,"description":"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.","dates":{"published":"2023-04-19T21:42:02.402Z","modified":"2025-02-05T14:44:18.828Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.5,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":5.5,"severity":"medium","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Red hat","score":5.5,"severity":"medium","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","exploitability":4.6,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":5.5,"severity":"medium","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","exploitability":4.6,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":5.5,"severity":"medium","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","exploitability":4.6,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":5.5,"severity":"medium","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00219,"percentile":0.11602,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.00219},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00219,"percentile":0.11602}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00219,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00219,"percentile":0.11602}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-532","name":"Insertion of Sensitive Information into Log File","description":"The product writes sensitive information to a log file.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/532.html"}],"affected":[{"vendor":"canonical ltd.","product":"cloud-init","name":"cloud-init","label":"cloud-init","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 21.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 21.2","eol":null,"hubHref":"/vendor/canonical_ltd/cloud-init"},{"vendor":"canonical","product":"cloud-init","name":"cloud-init","label":"cloud-init","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 21.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 21.2","eol":null,"hubHref":"/vendor/canonical/cloud-init"},{"vendor":"debian","product":"cloud-init","name":"cloud-init","label":"cloud-init","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/cloud-init","purlType":"deb","versions":[{"text":"< 20.4.1-2","noFixRecorded":false,"fixedIn":null},{"text":"< 0.7.9-2+deb9u1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 20.4.1-2 | < 0.7.9-2+deb9u1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"cloud-init","name":"cloud-init","label":"cloud-init","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/cloud-init","purlType":"deb","versions":[{"text":"< 21.1-19-gbad84ad4-0ubuntu1~16.04.1","noFixRecorded":false,"fixedIn":null},{"text":"< 21.1-19-gbad84ad4-0ubuntu1~18.04.1","noFixRecorded":false,"fixedIn":null},{"text":"< 21.1-19-gbad84ad4-0ubuntu1~20.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 21.1-19-gbad84ad4-0ubuntu1~16.04.1 | < 21.1-19-gbad84ad4-0ubuntu1~18.04.1 | < 21.1-19-gbad84ad4-0ubuntu1~20.04.1","eol":null,"hubHref":null},{"vendor":"mageia","product":"cloud-init","name":"cloud-init","label":"cloud-init","ecosystem":"Mageia","cpePart":null,"purl":"pkg:rpm/mageia/cloud-init","purlType":"rpm","versions":[{"text":"< 20.2-2.1.mga8","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 20.2-2.1.mga8","eol":null,"hubHref":null},{"vendor":"redhat","product":"cloud-init","name":"cloud-init","label":"cloud-init","ecosystem":"Red Hat","cpePart":null,"purl":"pkg:rpm/redhat/cloud-init","purlType":"rpm","versions":[{"text":"< 0:18.5-12.el8_2.10","noFixRecorded":false,"fixedIn":null},{"text":"< 0:20.3-10.el8_4.5","noFixRecorded":false,"fixedIn":null},{"text":"< 0:18.5-7.el8_1.6","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0:18.5-12.el8_2.10 | < 0:20.3-10.el8_4.5 | < 0:18.5-7.el8_1.6","eol":null,"hubHref":null}],"affectedCount":6,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/canonical/cloud-init/commit/b794d426b9ab43ea9d6371477466070d86e10668","label":"github.com/canonical/cloud-init/commit/b794d426b9ab43ea9d6371477466070d86e10668","hostname":"github.com","tags":["Patch"]},{"url":"https://advisories.mageia.org/MGASA-2021-0494.html","label":"advisories.mageia.org/MGASA-2021-0494.html","hostname":"advisories.mageia.org","tags":["Advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=28991","label":"bugs.mageia.org/show_bug.cgi?id=28991","hostname":"bugs.mageia.org","tags":["REPORT"]},{"url":"https://www.debian.org/lts/security/2021/dla-2601","label":"www.debian.org/lts/security/2021/dla-2601","hostname":"www.debian.org","tags":["WEB"]},{"url":"https://github.com/canonical/cloud-init/releases/tag/21.2","label":"github.com/canonical/cloud-init/releases/tag/21.2","hostname":"github.com","tags":["WEB"]},{"url":"https://access.redhat.com/errata/RHSA-2021:3081","label":"access.redhat.com/errata/RHSA-2021:3081","hostname":"access.redhat.com","tags":["Advisory"]},{"url":"https://access.redhat.com/security/updates/classification/#moderate","label":"access.redhat.com/security/updates/classification/","hostname":"access.redhat.com","tags":["ARTICLE"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1940967","label":"bugzilla.redhat.com/show_bug.cgi?id=1940967","hostname":"bugzilla.redhat.com","tags":["REPORT"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_3081.json","label":"security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_3081.json","hostname":"security.access.redhat.com","tags":["Advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2021-3429","label":"access.redhat.com/security/cve/CVE-2021-3429","hostname":"access.redhat.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-3429","label":"www.cve.org/CVERecord?id=CVE-2021-3429","hostname":"www.cve.org","tags":["Advisory","REPORT"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3429","label":"nvd.nist.gov/vuln/detail/CVE-2021-3429","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2021:3177","label":"access.redhat.com/errata/RHSA-2021:3177","hostname":"access.redhat.com","tags":["Advisory"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_3177.json","label":"security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_3177.json","hostname":"security.access.redhat.com","tags":["Advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2021:3371","label":"access.redhat.com/errata/RHSA-2021:3371","hostname":"access.redhat.com","tags":["Advisory"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_3371.json","label":"security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_3371.json","hostname":"security.access.redhat.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-3429","label":"ubuntu.com/security/CVE-2021-3429","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-3429","label":"security-tracker.debian.org/tracker/CVE-2021-3429","hostname":"security-tracker.debian.org","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":["OPENSUSE-SU-2024:13053-1","SUSE-FU-2023:3283-1","SUSE-SU-2023:2164-1"],"duplicates":[],"related":["OPENSUSE-SU-2024:13053-1","SUSE-FU-2023:3283-1","SUSE-SU-2023:2164-1"]},"timeline":[{"kind":"published","date":"2023-04-19T21:42:02.402Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2025-02-05T14:44:18.828Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":22,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T04:57:24.475Z","stale":false,"partial":false}}