{"id":"CVE-2019-5021","url":"https://www.cyber-defence.io/tools/cve/CVE-2019-5021","generatedAt":"2026-10-27T22:31:07.976Z","title":"This vulnerability appears to be the result of a regression introduced in December of 2015.","description":"Versions of the Official Alpine Linux Docker images (since v3.3) contain a NULL password for the `root` user. This vulnerability appears to be the result of a regression introduced in December of 2015. Due to the nature of this issue, systems deployed using affected versions of the Alpine Linux container which utilize Linux PAM, or some other mechanism which uses the system shadow file as an authentication database, may accept a NULL password for the `root` user.","published":"2019-05-08T17:29:01.000Z","lastModified":"2026-06-17T02:37:00.000Z","status":"Modified","sourceIdentifier":"talos-cna@cisco.com","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-258"],"affected":["gliderlabs/docker-alpine","opensuse/leap","f5/big-ip controller"],"epss":{"score":0.06263,"percentile":0.93519,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (6.26%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00004.html","tags":["Mailing List","Third Party Advisory"],"source":"talos-cna@cisco.com"},{"url":"http://www.securityfocus.com/bid/108288","tags":["Broken Link"],"source":"talos-cna@cisco.com"},{"url":"https://alpinelinux.org/posts/Docker-image-vulnerability-CVE-2019-5021.html","tags":["Vendor Advisory"],"source":"talos-cna@cisco.com"},{"url":"https://security.netapp.com/advisory/ntap-20190510-0001/","tags":["Third Party Advisory"],"source":"talos-cna@cisco.com"},{"url":"https://support.f5.com/csp/article/K25551452","tags":["Third Party Advisory"],"source":"talos-cna@cisco.com"},{"url":"https://talosintelligence.com/vulnerability_reports/TALOS-2019-0782","tags":["Exploit","Mitigation","Patch","Third Party Advisory"],"source":"talos-cna@cisco.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00004.html","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/108288","tags":["Broken Link"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://alpinelinux.org/posts/Docker-image-vulnerability-CVE-2019-5021.html","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20190510-0001/","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.f5.com/csp/article/K25551452","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://talosintelligence.com/vulnerability_reports/TALOS-2019-0782","tags":["Exploit","Mitigation","Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-5021","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}