CVE-2025-11561
Estado: AplazadaAlta (8.8)—
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.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 8.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.80%
- Percentil entre todas las CVEs puntuadas: 55
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1210Exploitation of Remote Serviceslateral movement85 % - Impacto principal
T1068Exploitation for Privilege Escalationprivilege escalation90 % - Impacto secundario
T1078Valid Accountsstealth · persistence · privilege escalation · initial access75 %
Vulnerabilidad en servicios remotos Kerberos/AD que requiere PR:L (permisos previos en el dominio para modificar atributos AD). Permite escalada de privilegios mediante suplantación de usuarios privilegiados en hosts Linux unidos al dominio.
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (3)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
CWE
- CWE-269
Referencias
- https://access.redhat.com/errata/RHSA-2025:19610
- https://access.redhat.com/errata/RHSA-2025:19847
- https://access.redhat.com/errata/RHSA-2025:19848
- https://access.redhat.com/errata/RHSA-2025:19849
- https://access.redhat.com/errata/RHSA-2025:19850
- https://access.redhat.com/errata/RHSA-2025:19851
- https://access.redhat.com/errata/RHSA-2025:19852
- https://access.redhat.com/errata/RHSA-2025:19853
- https://access.redhat.com/errata/RHSA-2025:19854
- https://access.redhat.com/errata/RHSA-2025:19859
- https://access.redhat.com/errata/RHSA-2025:20954
- https://access.redhat.com/errata/RHSA-2025:21020
- https://access.redhat.com/errata/RHSA-2025:21067
- https://access.redhat.com/errata/RHSA-2025:21329
- https://access.redhat.com/errata/RHSA-2025:21795
- https://access.redhat.com/errata/RHSA-2025:22256
- https://access.redhat.com/errata/RHSA-2025:22265
- https://access.redhat.com/errata/RHSA-2025:22277
- https://access.redhat.com/errata/RHSA-2025:22529
- https://access.redhat.com/errata/RHSA-2025:22548
- https://access.redhat.com/errata/RHSA-2025:22724
- https://access.redhat.com/errata/RHSA-2025:23113
- https://access.redhat.com/errata/RHSA-2026:0316
- https://access.redhat.com/errata/RHSA-2026:0677
- https://access.redhat.com/security/cve/CVE-2025-11561
- https://blog.async.sg/kerberos-ldr
- https://bugzilla.redhat.com/show_bug.cgi?id=2402727
- https://github.com/SSSD/sssd/issues/8021
JSON original (NVD)
Mostrar
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{
"url": "https://access.redhat.com/errata/RHSA-2025:19852",
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{
"url": "https://access.redhat.com/errata/RHSA-2025:19853",
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{
"url": "https://access.redhat.com/errata/RHSA-2025:19854",
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{
"url": "https://access.redhat.com/errata/RHSA-2025:19859",
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{
"url": "https://access.redhat.com/errata/RHSA-2025:20954",
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{
"url": "https://access.redhat.com/errata/RHSA-2025:21020",
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{
"url": "https://access.redhat.com/errata/RHSA-2025:21067",
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},
{
"url": "https://access.redhat.com/errata/RHSA-2025:21329",
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},
{
"url": "https://access.redhat.com/errata/RHSA-2025:21795",
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{
"url": "https://access.redhat.com/errata/RHSA-2025:22256",
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{
"url": "https://access.redhat.com/errata/RHSA-2025:22265",
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{
"url": "https://access.redhat.com/errata/RHSA-2025:22277",
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{
"url": "https://access.redhat.com/errata/RHSA-2025:22529",
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{
"url": "https://access.redhat.com/errata/RHSA-2025:22548",
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{
"url": "https://access.redhat.com/errata/RHSA-2025:22724",
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{
"url": "https://access.redhat.com/errata/RHSA-2025:23113",
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},
{
"url": "https://access.redhat.com/errata/RHSA-2026:0316",
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},
{
"url": "https://access.redhat.com/errata/RHSA-2026:0677",
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},
{
"url": "https://access.redhat.com/security/cve/CVE-2025-11561",
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},
{
"url": "https://blog.async.sg/kerberos-ldr",
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},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2402727",
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},
{
"url": "https://github.com/SSSD/sssd/issues/8021",
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],
"vulnStatus": "Deferred",
"weaknesses": [
{
"type": "Secondary",
"source": "secalert@redhat.com",
"description": [
{
"lang": "en",
"value": "CWE-269"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "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."
}
],
"lastModified": "2026-08-31T17:17:33.000",
"sourceIdentifier": "secalert@redhat.com"
}