CVE-2026-76578

Summary

A flaw was found in FreeIPA. The self-managed OTP token ACI does not require authentication and does not restrict which attributes may be added alongside the token entry. An unauthenticated LDAP client can exploit this, combined with a related flaw in the underlying directory server's ACI evaluation (tracked separately), to create an arbitrary attacker-controlled Kerberos principal and have it added to the administrators group. This allows a remote, unauthenticated attacker to obtain genuine FreeIPA administrator-group membership and perform administrative operations against the directory and, on SID-enabled deployments, other IdM services.

Affected Software

VendorProductVersion RangeStatus

Weaknesses

  • CWE-306: Missing Authentication for Critical Function

Workarounds

Until a fixed package is available, restrict network access to the LDAP service (typically ports 389/636) to trusted hosts only, using firewall rules or network segmentation. Disabling anonymous LDAP binds blocks this specific attack path, though administrators should confirm this does not break other required anonymous-bind functionality in their deployment before applying it.

References