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TI-2021-02826 Aliases CVE-2021-3917GHSA-862g-9h5m-m3qv

Incorrect default permissions in coreos-installer

Priority LOW 24CWE-276Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 2 fixed, 1 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat.

Summary

A flaw was found in the coreos-installer, where it writes the Ignition config to the target system with world-readable access permissions. This flaw allows a local attacker to have read access to potentially sensitive data. The highest threat from this vulnerability is to confidentiality.

Why it matters now

EPSS 0.00235 14th percentileScored 2026-11-07
Fix Partial coreos-installer (crates.io): 0.10.0Red Hat: 2 advisoriesRed Hat: 2 fixed, 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—coreos-installerFixed in coreos-installer 0.10.0—No fix listedCNA
—coreos-installer (crates.io)before 0.10.00.10.0Patch availableGHSA-862g-9h5m-m3qv
  • coreos-installer Vendor— Affected Fixed in coreos-installer 0.10.0 Fixed in — No fix listed CNA
  • coreos-installer (crates.io) Vendor— Affected before 0.10.0 Fixed in 0.10.0 Patch available GHSA-862g-9h5m-m3qv

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:redhat:coreos-installer:*:*:*:*:*:*:*:*before 0.10.0VulnerableRed Hat
  • cpe:2.3:a:redhat:coreos-installer:*:*:*:*:*:*:*:* Versions before 0.10.0 Vulnerable ·Red Hat

Remediation

  • Fix · GHSA-862g-9h5m-m3qv coreos-installer (crates.io) Fixed in 0.10.0 Advisory →

Red Hat 2 advisories

  • RHSA-2021:4829 Released 2021-11-30 · Red Hat rating Important
    OpenShift Container Platform 4.8.22 security update
    • Red Hat OpenShift Container Platform 4.8 coreos-installer-0.9.0-8.rhaos4.8.el8, jenkins-2-plugins-4.8.1637599935-1.el8, jenkins-2.303.3.1637596565-1.el8
  • RHSA-2021:3758 Released 2021-10-18 · Red Hat rating Moderate
    OpenShift Container Platform 4.9.0 packages and security update
    • Red Hat OpenShift Container Platform 4.9 coreos-installer-0.10.0-2.rhaos4.9.el8, coreos-installer-bootinfra-0.10.0-2.rhaos4.9.el8, jenkins-2.289.3.1630554997-1.el8 +10

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred
Red Hat OpenShift Container Platform 4.8Fixed RHSA-2021:4829
Red Hat OpenShift Container Platform 4.9Fixed RHSA-2021:3758
Not affected: 2 products
  • Red Hat OpenShift Container Platform 4.8
  • Red Hat OpenShift Container Platform 4.9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-3917
  2. 2026-10-03 Alias added: GHSA-862g-9h5m-m3qv

References

Patch 3

Advisory 2

Other 3

  • TI-2021-03608 Improper signature verification in coreos-installer CVSS 3.1HIGH 7.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences