CVE-2019-5021

moderate-risk
Published 2019-05-08

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.

Do I need to act?

~
3.5% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (4)

Docker-Alpine
Big-Ip Controller

Affected Vendors

F5 Opensuse Gliderlabs

References (12)

Mailing List http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00004.html
Broken Link http://www.securityfocus.com/bid/108288
Vendor Advisory https://alpinelinux.org/posts/Docker-image-vulnerability-CVE-2019-5021.html
Third Party Advisory https://security.netapp.com/advisory/ntap-20190510-0001/
Third Party Advisory https://support.f5.com/csp/article/K25551452
Exploit https://talosintelligence.com/vulnerability_reports/TALOS-2019-0782
Mailing List http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00004.html
Broken Link http://www.securityfocus.com/bid/108288
Vendor Advisory https://alpinelinux.org/posts/Docker-image-vulnerability-CVE-2019-5021.html
Third Party Advisory https://security.netapp.com/advisory/ntap-20190510-0001/
Third Party Advisory https://support.f5.com/csp/article/K25551452
Exploit https://talosintelligence.com/vulnerability_reports/TALOS-2019-0782
49
/ 100
moderate-risk
Severity 32/34 · Critical
Exploitability 7/34 · Low
Exposure 10/34 · Low