It has been found that in openshift-enterprise version 3.11 and openshift-enterprise versions 4.1 up to, including 4.3, multiple containers modify the permissions of /etc/passwd to make them modifiable by users other than root. An attacker with access to the running container can exploit this to modify /etc/passwd to add a user and escalate their privileges. This CVE is specific to the openshift/apb-tools-container.

References

• https://nvd.nist.gov/vuln/detail/CVE-2020-1706
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1706
• https://access.redhat.com/articles/4859371
• https://access.redhat.com/errata/RHSA-2020:2305
• https://access.redhat.com/errata/RHSA-2020:2442
• https://access.redhat.com/security/cve/CVE-2020-1706
• https://bugzilla.redhat.com/show_bug.cgi?id=1793302