FreeIPA 4.13.3#
The FreeIPA team would like to announce FreeIPA 4.13.3 release!
It can be downloaded from http://www.freeipa.org/page/Downloads. Builds for Fedora distributions will be available from the official repository soon.
Highlights in 4.13.3#
Security issues#
CVE-2026-11861: FreeIPA: Obtaining TGS with impersonating cname through trust relationships#
When a trust relationship is configured between FreeIPA and Active Directory, under certain conditions Active Directory users can bypass authentication for FreeIPA services, including the Web UI/IPA API, SMB services, and LDAP directory. This is possible by impersonating an client name on Active Directory side in the Ticket Granting Service (TGS) due to FreeIPA application services not verifying Privilege Attribute Certificate (PAC) content. This vulnerability could allow an authenticated Active Directory user to escalate their privileges within the FreeIPA domain.
The attack requires a cross-realm trust to be configured between FreeIPA and Active Directory, the attacker must already hold a valid Active Directory account, and the impersonation technique depends on the ability to register a duplicate or conflicting Service Principal Name (SPN) in the Active Directory forest. Microsoft addressed this prerequisite by enforcing SPN and UPN uniqueness constraints on Windows Server 2012 R2 domain controllers with MSKB-3070083 applied, and by default on Windows 11 version 22H2 and later. In environments where the Active Directory domain controllers are patched and running a supported functional level, the attack path is blocked on the Windows side. Only deployments trusting an outdated or unpatched Active Directory environment remain realistically at risk, making this primarily a theoretical concern in modern, maintained environments
Reported by Vladislav Plyatsok (rd01f)
CVE-2026-13097: Privilege escalation via krbCanonicalName manipulation due to realm-unaware uniqueness enforcement in FreeIPA LDAP datastore#
A privilege escalation flaw was found in FreeIPA. The uniqueness constraint enforced on Kerberos principal name attributes in the 389-ds directory server does not properly account for equivalent representations of the same principal name, allowing a user with sufficient LDAP write privileges to create a service principal that impersonates an existing privileged one. This can lead to unauthorized acquisition of Kerberos service tickets for sensitive services, potentially resulting in full domain compromise.
Reported by Vladislav Plyatsok (rd01f)
CVE-2026-73196: FreeIPA: Authenticated DoS in otptoken-add via unbounded OTP key decoding/re-encoding#
A low-privilege authenticated user can exploit this vulnerability by submitting an oversized One-Time Password (OTP) key value. This oversized key is then decoded and re-encoded without proper size limits, consuming excessive CPU and memory resources. This can lead to a denial of service, degrading the availability of the IPA service.
CVE-2026-73197: FreeIPA: Unauthenticated DoS in /ipa/migration/migration.py via Unbounded Request Body Read#
A remote, unauthenticated attacker can exploit this vulnerability by
sending oversized form POST requests to the
/ipa/migration/migration.py endpoint. This can force the migration
handler to read attacker-controlled request bodies fully into memory,
leading to increased memory usage, slower request handling, and
potential service disruption or denial of service.
CVE-2026-73198: FreeIPA: Unauthenticated DoS in /ipa/i18n_messages via Unbounded Request Body Read#
A remote, unauthenticated attacker can exploit a vulnerability in the
/ipa/i18n_messages endpoint by sending an arbitrarily large request
body. This can cause the service to consume excessive memory, leading to
memory exhaustion, degraded responsiveness, and a denial of service
(DoS) condition.
CVE-2026-73199: FreeIPA: NULL Pointer Dereference in ipa-enrollment Extended Operation (JOIN_OID) via Missing Request Value#
A flaw was found in the ipa-enrollment SLAPI plugin. A remote
authenticated client can exploit a null pointer dereference
vulnerability by sending a malformed Lightweight Directory Access
Protocol (LDAP) extended operation. By omitting the request value for
the JOIN_OID in the ipa-enrollment extended operation, an
attacker can trigger a server crash, potentially causing a denial of
service.
CVE-2026-19550#
The trust-fetch-domains command, used to refresh Active Directory
trust topology, is gated only by the read-level ACI on the trust object
(System: Read Trust Information, granted to any authenticated IPA
user by default) rather than a trust-administration-level permission.
Any authenticated, non-privileged IPA user can therefore invoke
ipa trust-fetch-domains, which calls a root-owned oddjobd/D-Bus
helper. This may lead to DoS abuse and potential spoofing of trust
related topology information.
Enhancements#
DNA config change to avoid 2 minutes delay during install
Bug Fixes#
FreeIPA 4.13.3 is a stabilization release for the features delivered as a part of 4.13 version series.
There are more than 10 bug-fixes since FreeIPA 4.13.2 release. Details of the bug-fixes can be seen in the list of resolved tickets below.
Upgrading#
Upgrade instructions are available on the Upgrade page.
Feedback#
Please provide comments, bugs and other feedback via the freeipa-users mailing list (https://lists.fedoraproject.org/archives/list/freeipa-users@lists.fedorahosted.org/) or #freeipa channel on libera.chat.
Resolved Tickets#
Detailed Changelog since 4.13.2#
Alexander Bokovoy (9)#
CVE-2026-19550: trust: require write access to refresh trust domains commit
ipatests: add integration tests for krbPrincipalMatch matching rule commit
Migrate kerberos uniqueness to krbPrincipalMatch on upgrade commit
Use krbPrincipalMatch for Kerberos uniqueness enforcement commit
Add Kerberos principal matching rule plugin for 389-ds commit
Fix LOG_ALERT macro redefinition warning in slapi plugins commit
pylint_plugins: fix fake_class() for astroid 4.x commit
dna plugin: use global configuration for replica communication commit
ipa-adtrust-install: remove NetBIOS ports requirement from the text commit #10019
Carla Martinez (4)#
David Hanina (1)#
Limit maximum request size for i18n commit
Erik Belko (1)#
ipatests: Add ipa-getcert request tests for FILE storage commit
eric786 (1)#
Florence Blanc-Renaud (13)#
join extop: return PROTOCOL ERROR if the payload is missing commit
ipa-migrate: require Replication Administrator privilege commit #10026
ipa-otptoken-import: request a MAC if a MAC method is specified commit #10031
ipa-epn: fix transposed uid/gid and fail closed on drop_privileges() commit #10030
host-mod: also guard userpassword when delivered via –setattr commit #10027
ipa-otptoken-import: harden lxml parser against XXE commit #10025
Spec file: bump samba version commit
ipatests: override uninstall in TestHSMcertFix commit #10021
ipatests: add xfail depending on softhsm version commit #9920
ipatests: add xfail for NTLM authentication tests commit #9999
Julien Rische (4)#
Rob Crittenden (1)#
xfail the sudo SSSD offline/caching tests commit
Shalini Khandelwal (1)#
ipatests: Add test for replica CA with external certs commit