CVE-2021-20182: A privilege escalation flaw was found in openshift4/ose-docker-builder. The build container runs with high privileges using a chrooted environment instead of…

PriorityP354high8.8CVSS 3.1

AVNACLPRLUINSUCHIHAH

EPSS

1.15%

63.2th percentile

A privilege escalation flaw was found in openshift4/ose-docker-builder. The build container runs with high privileges using a chrooted environment instead of runc. If an attacker can gain access to this build container, they can potentially utilize the raw devices of the underlying node, such as the network and storage devices, to at least escalate their privileges to that of the cluster admin. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Affected

4 ranges

Vendor	Product	Version range	Fixed in
redhat	openshift_container_platform	—	—
redhat	openshift_container_platform	>= 4.4 < 4.4.33	4.4.33
redhat	openshift_container_platform	>= 4.5 < 4.5.30	4.5.30
redhat	openshift_container_platform	>= 4.6 < 4.6.15	4.6.15

CVSS provenance

nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvdv2.06.5MEDIUMAV:N/AC:L/Au:S/C:P/I:P/A:P

vendor_redhat8.8HIGH

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.