What’s Vulnerable › Vulnerabilities

CVE-2025-11561: Sssd: sssd default kerberos configuration allows privilege escalation on ad-joined linux systems

Description

A flaw was found in the integration of Active Directory and the System Security Services Daemon (SSSD) on Linux systems. In default configurations, the Kerberos local authentication plugin (sssd_krb5_localauth_plugin) is enabled, but a fallback to the an2ln plugin is possible. This fallback allows an attacker with permission to modify certain AD attributes (such as userPrincipalName or samAccountName) to impersonate privileged users, potentially resulting in unauthorized access or privilege escalation on domain-joined Linux hosts.

Affected products

How to fix

Upgrade to a fixed version: Red Hat OpenShift Container Platform 4.18 418.94.202511170715-0; Red Hat Ceph Storage 7 7; Red Hat Ceph Storage 8 8; Red Hat Enterprise Linux 10 0:2.10.2-3.el10_0.3, 0:2.11.1-2.el10_1.1; Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:1.16.5-10.el7_9.17; Red Hat Enterprise Linux 8 0:2.9.4-5.el8_10.3; Red Hat Enterprise Linux 8.2 Advanced Update Support 0:2.2.3-20.el8_2.3; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:2.4.0-9.el8_4.4; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:2.4.0-9.el8_4.4; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:2.6.2-4.el8_6.4; Red Hat Enterprise Linux 8.6 Telecommunications Update Service 0:2.6.2-4.el8_6.4; Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions 0:2.6.2-4.el8_6.4. Check the vendor advisory for mitigations.

References

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