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

8.8 CVSS

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2025-11561

Check My Exposure

Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

Red Hat would like to thank Zavier Lee for reporting this issue.

References

More from Unknown

View All →

CVE-2025-9978

Jeg Elementor Kit < 2.7.0 - Author+ Stored XSS

Unknown 0

CVE-2025-9959

Sandbox escape in smolagents Local Python execution environment via dunder attributes

High 7.6

CVE-2025-9900

Libtiff: libtiff write-what-where

High 8.8

CVE-2025-9784

Undertow: undertow madeyoureset http/2 ddos vulnerability

High 7.5

CVE-2025-9710

Responsive Lightbox & Gallery < 2.5.3 - Unauthenticated Stored-XSS via Comments

Unknown 0

Affected Vendor

Unknown

View all reports →

Affected Software

Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7 Extended Lifecycle Support, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8.2 Advanced Update Support, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On, Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Telecommunications Update Service, Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions, Red Hat Enterprise Linux 8.8 Telecommunications Update Service, Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions, Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions, Red Hat Enterprise Linux 9.4 Extended Update Support, Red Hat Enterprise Linux 9.6 Extended Update Support, Red Hat OpenShift Container Platform 4.12, Red Hat OpenShift Container Platform 4.13, Red Hat OpenShift Container Platform 4.14, Red Hat OpenShift Container Platform 4.15, Red Hat OpenShift Container Platform 4.16, Red Hat OpenShift Container Platform 4.17, Red Hat OpenShift Container Platform 4.18, Red Hat OpenShift Container Platform 4.19, Red Hat OpenShift Container Platform 4.20, Red Hat Ceph Storage 7, Red Hat Ceph Storage 8, Red Hat Enterprise Linux 6

Vulnerable Versions:

0, 0:2.10.2-3.el10_0.3, 0:2.11.1-2.el10_1.1, 0:1.16.5-10.el7_9.17, 0:2.9.4-5.el8_10.3, 0:2.2.3-20.el8_2.3, 0:2.4.0-9.el8_4.4, 0:2.6.2-4.el8_6.4, 0:2.8.2-4.el8_8.3, 0:2.9.7-4.el9_7.1, 0:2.6.2-4.el9_0.4, 0:2.8.2-5.el9_2.6, 0:2.9.4-6.el9_4.4, 0:2.9.6-4.el9_6.3, 412.86.202601061735-0, 413.92.202601130113-0, 414.92.202511122212-0, 415.92.202512100122-0, 416.94.202512030118-0, 417.94.202511260612-0, 418.94.202511170715-0, 4.19.9.6.202511252219-0, 4.20.9.6.202511252309-0, sha256:6b79ed10423d954d21dd24c9cb1cf507f6e02c2942ace7fa30cf7af2ffaeb631, sha256:04a48d31f7336e0d5958eed1ddb1a117148f791baccef4e6e08943181e6794c8