CVE-2019-5021 Information

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.

CVSS Vector

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

Reference

http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00004.html http://www.securityfocus.com/bid/108288 https://alpinelinux.org/posts/Docker-image-vulnerability-CVE-2019-5021.html https://security.netapp.com/advisory/ntap-20190510-0001/ https://support.f5.com/csp/article/K25551452 https://talosintelligence.com/vulnerability_reports/TALOS-2019-0782

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8