Cluster-admin escalation via privileged chrooted builder
Published Feb 23, 2021 · Updated Aug 3, 2024
Privilege escalation in Red Hat OpenShift Container Platform 4.4 through 4.6 allows remote authenticated users to reach cluster-admin privileges via a build container. The builder runs image builds in a highly privileged chroot instead of runc, exposing underlying node raw network and storage devices to code executing inside the container. Exploitation requires permission to run a build and code execution in that build; successful access can compromise cluster data confidentiality, integrity, and availability.
Summary
What happened
Privilege escalation in Red Hat OpenShift Container Platform 4.4 through 4.6 allows remote authenticated users to reach cluster-admin privileges via a build container. The builder runs image builds in a highly privileged chroot instead of runc, exposing underlying node raw network and storage devices to code executing inside the container. Exploitation requires permission to run a build and code execution in that build; successful access can compromise cluster data confidentiality, integrity, and availability.
The record
- CVE
- CVE-2021-20182
- Published
- Feb 23, 2021
- Updated
- Aug 3, 2024
- Vendor
- Red Hat
- Product
- Red Hat OpenShift Container Platform
- Classifications
- CWE-552, T1611
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 23, 2021CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=github.com/openshift/builder v0.0.0-20210118193943-6d10f5202a76
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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