CVE intelligence and bounded remediation

CVE-2023-3027 — The grc-policy-propagator allows security escalation within the cluster

High CVSS 7.8

The grc-policy-propagator allows security escalation within the cluster. The propagator allows policies which contain some dynamically obtained values (instead of the policy apply a static manifest on a managed cluster) of taking advantage of cluster scoped access in a created policy. This feature does not restrict properly to lookup content from the namespace where the policy was created.

Severity
High
CVSS
7.8 (3.1)
Published
2023-06-05
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-269, CWE-863

Affected products

  • redhat / advanced_cluster_management_for_kubernetes / 2.5
  • redhat / advanced_cluster_management_for_kubernetes / 2.6
  • redhat / advanced_cluster_management_for_kubernetes / 2.7

Matched remediation archetype

Privilege escalation and unsafe privilege management

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Check exposure

  • Map service accounts, operating-system identities, roles, capabilities, impersonation, set-user transitions, and administrative helper paths.
  • Determine whether untrusted users or lower-privilege processes can reach the affected transition or modify inputs it trusts.
  • Review file, socket, registry, device, job, container, and cloud-role permissions used before and after privilege changes.

Remediate safely

  • Apply the supported fix and redesign privileged operations as a minimal, authenticated, allowlisted interface.
  • Drop privileges before processing untrusted input, verify the drop succeeds, and remove unnecessary roles, capabilities, and write permissions.
  • Validate ownership and permissions at time of use and add explicit lower-to-higher privilege boundary tests.

Authoritative sources

Complete CVE record and remediation plan

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