CVE-2021-3344

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-03-16 · updated 2026-06-17
Weakness: CWE-522

Description

A privilege escalation flaw was found in OpenShift builder. During build time, credentials outside the build context are automatically mounted into the container image under construction. An OpenShift user, able to execute code during build time inside this container can re-use the credentials to overwrite arbitrary container images in internal registries and/or escalate their privileges. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. This affects github.com/openshift/builder v0.0.0-20210125201112-7901cb396121 and before.

Affected products

RedHat Openshift Builder: before 2021-01-26 — fixed in 2021-01-26
Red Hat OpenShift Container Platform 4.18: from 4.5 before 4.5.33; from 4.6 before 4.6.16 — fixed in 4.5.33, 4.6.16

How to fix

Upgrade to a fixed version: RedHat Openshift Builder 2021-01-26; Red Hat OpenShift Container Platform 4.18 4.5.33, 4.6.16. Check the vendor advisory for mitigations.

References

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