Sssd: sssd default kerberos configuration allows privilege escalation on ad-joined linux systems
Summary
| CVE | CVE-2025-11561 |
|---|---|
| State | PUBLISHED |
| Assigner | redhat |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2025-10-09 14:15:54 UTC |
| Updated | 2026-08-31 17:17:33 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 8.8 HIGH from [email protected]
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.007560000 probability, percentile 0.526550000 (date 2026-09-01)
Problem Types: CWE-269 | CWE-269 Improper Privilege Management
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 8.8 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | CVSS | 8.8 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Red Hat | Red Hat Enterprise Linux 10 | unaffected 0:2.10.2-3.el10_0.3 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 10 | unaffected 0:2.11.1-2.el10_1.1 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | unaffected 0:1.16.5-10.el7_9.17 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8 | unaffected 0:2.9.4-5.el8_10.3 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8 | unaffected 0:2.9.4-5.el8_10.3 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8.2 Advanced Update Support | unaffected 0:2.2.3-20.el8_2.3 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | unaffected 0:2.4.0-9.el8_4.4 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | unaffected 0:2.4.0-9.el8_4.4 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | unaffected 0:2.6.2-4.el8_6.4 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8.6 Telecommunications Update Service | unaffected 0:2.6.2-4.el8_6.4 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8.6 Update Services For SAP Solutions | unaffected 0:2.6.2-4.el8_6.4 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | unaffected 0:2.8.2-4.el8_8.3 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8.8 Update Services For SAP Solutions | unaffected 0:2.8.2-4.el8_8.3 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 9 | unaffected 0:2.9.7-4.el9_7.1 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 9 | unaffected 0:2.9.7-4.el9_7.1 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 9.0 Update Services For SAP Solutions | unaffected 0:2.6.2-4.el9_0.4 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 9.2 Update Services For SAP Solutions | unaffected 0:2.8.2-5.el9_2.6 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 9.4 Extended Update Support | unaffected 0:2.9.4-6.el9_4.4 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | unaffected 0:2.9.6-4.el9_6.3 * rpm | Not specified |
| CNA | Red Hat | Red Hat OpenShift Container Platform 4.12 | unaffected 412.86.202601061735-0 * rpm | Not specified |
| CNA | Red Hat | Red Hat OpenShift Container Platform 4.13 | unaffected 413.92.202601130113-0 * rpm | Not specified |
| CNA | Red Hat | Red Hat OpenShift Container Platform 4.14 | unaffected 414.92.202511122212-0 * rpm | Not specified |
| CNA | Red Hat | Red Hat OpenShift Container Platform 4.15 | unaffected 415.92.202512100122-0 * rpm | Not specified |
| CNA | Red Hat | Red Hat OpenShift Container Platform 4.16 | unaffected 416.94.202512030118-0 * rpm | Not specified |
| CNA | Red Hat | Red Hat OpenShift Container Platform 4.17 | unaffected 417.94.202511260612-0 * rpm | Not specified |
| CNA | Red Hat | Red Hat OpenShift Container Platform 4.18 | unaffected 418.94.202511170715-0 * rpm | Not specified |
| CNA | Red Hat | Red Hat OpenShift Container Platform 4.19 | unaffected 4.19.9.6.202511252219-0 * rpm | Not specified |
| CNA | Red Hat | Red Hat OpenShift Container Platform 4.20 | unaffected 4.20.9.6.202511252309-0 * rpm | Not specified |
| CNA | Red Hat | Red Hat Ceph Storage 7 | unaffected 7 * rpm | Not specified |
| CNA | Red Hat | Red Hat Ceph Storage 8 | unaffected 8 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 6 | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift Container Platform 4 | Not specified | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/SSSD/sssd/issues/8021 | [email protected] | github.com | |
| access.redhat.com/errata/RHSA-2025:22529 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:0316 | [email protected] | access.redhat.com | |
| access.redhat.com/security/cve/CVE-2025-11561 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2025:21020 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2025:20954 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2025:19859 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2025:22265 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2025:21067 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2025:19610 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2025:21795 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2025:19854 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2025:19849 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2025:21329 | [email protected] | access.redhat.com | |
| blog.async.sg/kerberos-ldr | [email protected] | blog.async.sg | |
| access.redhat.com/errata/RHSA-2025:19852 | [email protected] | access.redhat.com | |
| bugzilla.redhat.com/show_bug.cgi | [email protected] | bugzilla.redhat.com | |
| access.redhat.com/errata/RHSA-2025:22256 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2025:22724 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2025:19848 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2025:19853 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2025:19850 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2025:19847 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2025:22277 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2025:22548 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2025:23113 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:0677 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2025:19851 | [email protected] | access.redhat.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Red Hat would like to thank Zavier Lee for reporting this issue. (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2025-10-09T12:57:29.851Z | Reported to Red Hat. |
| CNA | 2025-10-09T00:00:00.000Z | Made public. |
Workarounds
CNA: To mitigate this issue, ensure the SSSD Kerberos local authentication plugin (sssd_krb5_localauth_plugin) is configured and the an2ln plugin is disabled by adding "disable = an2ln" in a krb5 include file, for example /var/lib/sss/pubconf/krb5.include.d/localauth_plugin and make sure it is included in the Kerberos configuration. Apply vendor updates and follow Red Hat guidance for SSSD hardening.
There are currently no legacy QID mappings associated with this CVE.