CVE-2019-5021

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.

Affected

Alpine Linux

CVSS v3.1 NVD

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.0 CISCO

9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0 NVD

10.0 HIGHAV:N/AC:L/Au:N/C:C/I:C/A:C

EPSS

6.26% chance of exploitation in the next 30 days, 94th percentile

Published

2019-05-08

Updated

2024-08-04

Proof-of-concept exploits (1)

• https://talosintelligence.com/vulnerability_reports/TALOS-2019-0782

Security advisories

• https://alpinelinux.org/posts/Docker-image-vulnerability-CVE-2019-5021.html
• http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00004.html
• https://security.netapp.com/advisory/ntap-20190510-0001
• https://support.f5.com/csp/article/K25551452
• http://www.securityfocus.com/bid/108288

References

• CVE Record
• NVD entry