Introduction
Attackers can escalate privileges from a regular host to a domain administrator in FreeIPA deployments, and can potentially gain full control over authentication and authorization for an entire enterprise. The flaw exposes sensitive data and administrative interfaces to unauthorized users. That makes it a critical concern for any organization that relies on FreeIPA for centralized identity management.
About FreeIPA: FreeIPA is an open-source identity management solution, developed primarily by Red Hat, that provides centralized authentication, authorization, and account management for Linux and UNIX environments. It integrates LDAP, Kerberos, DNS, and certificate management, and it is widely used in enterprises, especially those running Red Hat Enterprise Linux (RHEL). Many organizations build their security and access control infrastructure on it.
Technical Information
CVE-2025-7493 is a privilege escalation vulnerability. It exists because FreeIPA fails to enforce uniqueness of the krbCanonicalName attribute for the root@REALM principal. The issue is closely related to CVE-2025-4404, which addressed similar concerns for admin@REALM but did not extend the protections to root@REALM.
Vulnerability Mechanism:
- FreeIPA uses the
krbCanonicalNameattribute to uniquely identify Kerberos principals within a realm. - Before the fix, FreeIPA did not check that
root@REALMwas unique across all entries. - An attacker with sufficient privileges, such as the ability to create host or service entries, could register a new LDAP entry with
krbCanonicalNameset toroot@REALM. - The attacker can then request Kerberos tickets as
root@REALM, which effectively grants them domain administrator privileges. - The vulnerability is classified under CWE-1220 (Insufficient Verification of Data Authenticity).
Root Cause:
The patch for CVE-2025-4404 added validation for admin@REALM but left out root@REALM. New entries could therefore still use root@REALM as a canonical name and bypass the intended administrative controls.
Attack Flow:
- An attacker with LDAP write access creates a new host or service entry with
krbCanonicalName: root@REALM. - The attacker requests a Kerberos ticket for
root@REALM. - The ticket grants domain administrator privileges, which gives the attacker full control over the FreeIPA realm.
The referenced sources contain no public code snippets.
Affected Systems and Versions
- FreeIPA deployments that have not applied the latest validation fixes for
krbCanonicalNameuniqueness (as of September 2025) - Specifically, configurations where users have privileges to create host or service entries
- Versions patched for CVE-2025-4404 but not yet patched for CVE-2025-7493
- For exact affected version numbers, consult Red Hat advisories and FreeIPA release notes
Vendor Security History
- FreeIPA was previously affected by CVE-2025-4404, a similar privilege escalation flaw involving
admin@REALM - Red Hat has a history of responding quickly to critical FreeIPA vulnerabilities, typically with coordinated advisories and patches
- The recurrence of similar issues suggests that FreeIPA's Kerberos integration still struggles to enforce unique identity constraints
