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Fencer Vulns
high 8.8

CVE-2021-3344 json

A privilege escalation flaw was found in OpenShift builder.

published 2021-03-16 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-26675

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 67%
public exploits
0
none known

Summary

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.

Patch / fix

  • redhat openshift_builder 2021-01-26
  • redhat openshift_container_platform 4.5.33, 4.6.16

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-3344 updated cvss 8.8

openshift/builder: privilege escalation during container image builds via mounted secrets

  • Red Hat OpenShift Container Platform 4.5 openshift4/ose-ironic-rhel8 v4.5.0-202102200050.p0, openshift4/ose-docker-builder v4.5.0-202102200202.p0, openshift4/ose-ironic-inspector-rhel8 v4.5.0-202102200050.p0, openshift4/ose-ironic-ipa-downloader-rhel8 v4.5.0-202102200050.p0, openshift4/ose-ironic-static-ip-manager-rhel8 v4.5.0-202102200050.p0, openshift4/ose-ironic-machine-os-downloader-rhel8 v4.5.0-202102200050.p0, +1 more
    fixed: vendor fix RHSA-2021:0428
  • Red Hat OpenShift Container Platform 4.6 openshift4/ose-docker-builder v4.6.0-202101300140.p0
    fixed: vendor fix RHSA-2021:0308
  • Red Hat OpenShift Container Platform 3.11 atomic-openshift, atomic-openshift-pod, atomic-openshift-node, atomic-openshift-tests, atomic-openshift-master, atomic-openshift-clients, +7 more Red Hat OpenShift Container Platform 4.5 openshift4/ose-cli v4.5.0-202102200202.p0, openshift4/ose-pod v4.5.0-202102200202.p0, openshift4/ose-etcd v4.5.0-202102200202.p0, openshift4/ose-tests v4.5.0-202102200202.p0, openshift4/ose-console v4.5.0-202102200202.p0, openshift4/ose-coredns v4.5.0-202102200202.p0, +69 more Red Hat OpenShift Container Platform 4.6 openshift4/ose-cli v4.6.0-202101301510.p0, openshift4/ose-pod v4.6.0-202101300140.p0, openshift4/ose-etcd v4.6.0-202101300140.p0, openshift4/ose-tests v4.6.0-202101301510.p0, openshift4/ose-console v4.6.0-202101300140.p0, openshift4/ose-coredns v4.6.0-202101300140.p0, +119 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.17% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.5 AV:N/AC:L/Au:S/C:P/I:P/A:P

Affected products

  • n/a openshift/builder

Classification

Weakness
  • CWE-522 Insufficiently Protected Credentials

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.