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Linux Distros Unpatched Vulnerability : CVE-2025-11561

high Nessus Plugin ID 270209

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

 - 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. (CVE-2025-11561)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2025-11561

https://security-tracker.debian.org/tracker/CVE-2025-11561

https://ubuntu.com/security/CVE-2025-11561

Plugin Details

Severity: High

ID: 270209

File Name: unpatched_CVE_2025_11561.nasl

Version: 1.2

Type: local

Agent: unix

Family: Misc.

Published: 10/13/2025

Updated: 10/27/2025

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 5.7

Temporal Score: 4.8

Vector: CVSS2#AV:L/AC:L/Au:S/C:P/I:P/A:C

CVSS Score Source: CVE-2025-11561

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 8.1

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:U/RC:C

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, p-cpe:/a:centos:centos:sssd, p-cpe:/a:centos:centos:sssd-tools, p-cpe:/a:centos:centos:libipa_hbac, p-cpe:/a:centos:centos:libsss_autofs, p-cpe:/a:centos:centos:libsss_nss_idmap, p-cpe:/a:centos:centos:libsss_nss_idmap-devel, p-cpe:/a:centos:centos:libsss_simpleifp-devel, p-cpe:/a:centos:centos:python-sss-murmur, p-cpe:/a:centos:centos:sssd-ad, p-cpe:/a:centos:centos:sssd-common, p-cpe:/a:centos:centos:sssd-common-pac, p-cpe:/a:centos:centos:sssd-ipa, p-cpe:/a:centos:centos:sssd-krb5, p-cpe:/a:centos:centos:sssd-ldap, p-cpe:/a:centos:centos:sssd-libwbclient-devel, p-cpe:/a:centos:centos:sssd-proxy, p-cpe:/a:centos:centos:libsss_certmap, p-cpe:/a:centos:centos:libsss_certmap-devel, p-cpe:/a:centos:centos:sssd-kcm, p-cpe:/a:centos:centos:sssd-polkit-rules, p-cpe:/a:centos:centos:libini_config-devel, p-cpe:/a:centos:centos:libref_array-devel, p-cpe:/a:debian:debian_linux:sssd, p-cpe:/a:redhat:enterprise_linux:libipa_hbac, p-cpe:/a:redhat:enterprise_linux:libsss_autofs, p-cpe:/a:redhat:enterprise_linux:sssd, p-cpe:/a:redhat:enterprise_linux:sssd-tools, p-cpe:/a:redhat:enterprise_linux:libini_config-devel, p-cpe:/a:redhat:enterprise_linux:libref_array-devel, p-cpe:/a:redhat:enterprise_linux:libsss_nss_idmap, p-cpe:/a:redhat:enterprise_linux:libsss_nss_idmap-devel, p-cpe:/a:redhat:enterprise_linux:libsss_simpleifp-devel, p-cpe:/a:redhat:enterprise_linux:python-sss-murmur, p-cpe:/a:redhat:enterprise_linux:sssd-ad, p-cpe:/a:redhat:enterprise_linux:sssd-common, p-cpe:/a:redhat:enterprise_linux:sssd-common-pac, p-cpe:/a:redhat:enterprise_linux:sssd-ipa, p-cpe:/a:redhat:enterprise_linux:sssd-krb5, p-cpe:/a:redhat:enterprise_linux:sssd-ldap, p-cpe:/a:redhat:enterprise_linux:sssd-proxy, p-cpe:/a:redhat:enterprise_linux:sssd-libwbclient-devel, p-cpe:/a:redhat:enterprise_linux:libsss_certmap, p-cpe:/a:redhat:enterprise_linux:libsss_certmap-devel, p-cpe:/a:redhat:enterprise_linux:sssd-kcm, p-cpe:/a:redhat:enterprise_linux:sssd-polkit-rules, p-cpe:/a:redhat:enterprise_linux:python3-libipa_hbac, p-cpe:/a:redhat:enterprise_linux:python3-libsss_nss_idmap, p-cpe:/a:redhat:enterprise_linux:python3-sssdconfig, p-cpe:/a:redhat:enterprise_linux:sssd-nfs-idmap, p-cpe:/a:canonical:ubuntu_linux:sssd, p-cpe:/a:centos:centos:python3-libipa_hbac, p-cpe:/a:centos:centos:python3-libsss_nss_idmap, p-cpe:/a:centos:centos:python3-sssdconfig, p-cpe:/a:centos:centos:sssd-nfs-idmap, p-cpe:/a:redhat:enterprise_linux:sssd-idp, p-cpe:/a:redhat:enterprise_linux:sssd-passkey, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:centos:centos:sssd-idp, cpe:/o:canonical:ubuntu_linux:25.04, cpe:/o:redhat:enterprise_linux:10, p-cpe:/a:centos:centos:sssd-passkey, cpe:/o:centos:centos:7, cpe:/o:redhat:enterprise_linux:7, cpe:/o:redhat:enterprise_linux:8, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:centos:centos:sssd-client, p-cpe:/a:centos:centos:libipa_hbac-devel, p-cpe:/a:centos:centos:libipa_hbac-python, p-cpe:/a:centos:centos:libsss_idmap, p-cpe:/a:centos:centos:libsss_idmap-devel, p-cpe:/a:centos:centos:libsss_sudo, p-cpe:/a:centos:centos:libsss_simpleifp, p-cpe:/a:centos:centos:python-libipa_hbac, p-cpe:/a:centos:centos:python-libsss_nss_idmap, p-cpe:/a:centos:centos:python-sss, p-cpe:/a:centos:centos:python-sssdconfig, p-cpe:/a:centos:centos:sssd-dbus, p-cpe:/a:centos:centos:sssd-krb5-common, p-cpe:/a:centos:centos:sssd-libwbclient, p-cpe:/a:centos:centos:libsss_nss_idmap-python, p-cpe:/a:centos:centos:sssd-winbind-idmap, p-cpe:/a:centos:centos:libcollection, p-cpe:/a:centos:centos:libcollection-devel, p-cpe:/a:centos:centos:libdhash, p-cpe:/a:centos:centos:libdhash-devel, p-cpe:/a:centos:centos:libini_config, p-cpe:/a:centos:centos:libpath_utils, p-cpe:/a:centos:centos:libpath_utils-devel, p-cpe:/a:centos:centos:libref_array, p-cpe:/a:redhat:enterprise_linux:libipa_hbac-devel, p-cpe:/a:redhat:enterprise_linux:libipa_hbac-python, p-cpe:/a:redhat:enterprise_linux:libsss_idmap, p-cpe:/a:redhat:enterprise_linux:libsss_idmap-devel, p-cpe:/a:redhat:enterprise_linux:libsss_sudo, p-cpe:/a:redhat:enterprise_linux:sssd-client, p-cpe:/a:redhat:enterprise_linux:libcollection, p-cpe:/a:redhat:enterprise_linux:libcollection-devel, p-cpe:/a:redhat:enterprise_linux:libdhash, p-cpe:/a:redhat:enterprise_linux:libdhash-devel, p-cpe:/a:redhat:enterprise_linux:libini_config, p-cpe:/a:redhat:enterprise_linux:libpath_utils, p-cpe:/a:redhat:enterprise_linux:libpath_utils-devel, p-cpe:/a:redhat:enterprise_linux:libref_array, p-cpe:/a:redhat:enterprise_linux:libsss_simpleifp, p-cpe:/a:redhat:enterprise_linux:python-libipa_hbac, p-cpe:/a:redhat:enterprise_linux:python-libsss_nss_idmap, p-cpe:/a:redhat:enterprise_linux:python-sss, p-cpe:/a:redhat:enterprise_linux:python-sssdconfig, p-cpe:/a:redhat:enterprise_linux:sssd-dbus, p-cpe:/a:redhat:enterprise_linux:sssd-krb5-common, p-cpe:/a:redhat:enterprise_linux:libsss_nss_idmap-python, p-cpe:/a:redhat:enterprise_linux:sssd-libwbclient, p-cpe:/a:redhat:enterprise_linux:sssd-winbind-idmap, p-cpe:/a:redhat:enterprise_linux:python3-sss, p-cpe:/a:redhat:enterprise_linux:python3-sss-murmur, cpe:/o:centos:centos:8, p-cpe:/a:centos:centos:python3-sss, p-cpe:/a:centos:centos:python3-sss-murmur, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:redhat:enterprise_linux:9, cpe:/o:debian:debian_linux:12.0, cpe:/o:debian:debian_linux:13.0, cpe:/o:debian:debian_linux:14.0, cpe:/o:canonical:ubuntu_linux:25.10

Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 10/9/2025

Reference Information

CVE: CVE-2025-11561