CVE-2021-20182

openshift: builder allows read and write of block devices

Published Feb 23, 2021 CVSS 3.1 · 8.8 High EPSS 1.1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2021-7637 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.
History

No history.

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Aug 3, 2024, 5:30 PM
Reserved
Dec 17, 2020, 12:00 AM
Status
Modified
Published
Feb 23, 2021, 10:15 PM
Modified
Jun 17, 2026, 3:33 AM
Severity
Important
Public date
Feb 2, 2021, 12:00 AM