{"id":"UBUNTU-CVE-2025-11561","details":"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.","modified":"2026-09-03T16:03:39.786154970Z","published":"2025-10-09T14:15:00Z","upstream":["CVE-2025-11561"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-11561"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2025-11561"},{"type":"REPORT","url":"https://blog.async.sg/kerberos-ldr"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2025-11561"}],"affected":[{"package":{"name":"sssd","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/sssd?arch=source&distro=esm-infra-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.12.5-2","1.13.1-2","1.13.2-1","1.13.3-1","1.13.4-1","1.13.4-1ubuntu1","1.13.4-1ubuntu1.1","1.13.4-1ubuntu1.2","1.13.4-1ubuntu1.5","1.13.4-1ubuntu1.6","1.13.4-1ubuntu1.7","1.13.4-1ubuntu1.8","1.13.4-1ubuntu1.9","1.13.4-1ubuntu1.10","1.13.4-1ubuntu1.11","1.13.4-1ubuntu1.12","1.13.4-1ubuntu1.13","1.13.4-1ubuntu1.14","1.13.4-1ubuntu1.15","1.13.4-1ubuntu1.15+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libipa-hbac0","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_name":"libnss-sss","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_name":"libpam-sss","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_name":"libsss-idmap0","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_version":"1.13.4-1ubuntu1.15+esm1","binary_name":"libsss-nss-idmap0"},{"binary_name":"libsss-simpleifp0","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_name":"libsss-sudo","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_version":"1.13.4-1ubuntu1.15+esm1","binary_name":"libwbclient-sssd"},{"binary_name":"python-libipa-hbac","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_name":"python-libsss-nss-idmap","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_version":"1.13.4-1ubuntu1.15+esm1","binary_name":"python-sss"},{"binary_version":"1.13.4-1ubuntu1.15+esm1","binary_name":"python3-libipa-hbac"},{"binary_name":"python3-libsss-nss-idmap","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_name":"python3-sss","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_version":"1.13.4-1ubuntu1.15+esm1","binary_name":"sssd"},{"binary_version":"1.13.4-1ubuntu1.15+esm1","binary_name":"sssd-ad"},{"binary_version":"1.13.4-1ubuntu1.15+esm1","binary_name":"sssd-ad-common"},{"binary_name":"sssd-common","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_name":"sssd-dbus","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_name":"sssd-ipa","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_name":"sssd-krb5","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_name":"sssd-krb5-common","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_version":"1.13.4-1ubuntu1.15+esm1","binary_name":"sssd-ldap"},{"binary_name":"sssd-proxy","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_name":"sssd-tools","binary_version":"1.13.4-1ubuntu1.15+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-11561.json"}},{"package":{"name":"sssd","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/sssd?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.15.3-2ubuntu1","1.15.3-3ubuntu1","1.16.0-5ubuntu1","1.16.0-5ubuntu2","1.16.1-1ubuntu1","1.16.1-1ubuntu1.1","1.16.1-1ubuntu1.2","1.16.1-1ubuntu1.3","1.16.1-1ubuntu1.4","1.16.1-1ubuntu1.5","1.16.1-1ubuntu1.6","1.16.1-1ubuntu1.7","1.16.1-1ubuntu1.8","1.16.1-1ubuntu1.8+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libipa-hbac0","binary_version":"1.16.1-1ubuntu1.8+esm1"},{"binary_version":"1.16.1-1ubuntu1.8+esm1","binary_name":"libnss-sss"},{"binary_name":"libpam-sss","binary_version":"1.16.1-1ubuntu1.8+esm1"},{"binary_version":"1.16.1-1ubuntu1.8+esm1","binary_name":"libsss-certmap0"},{"binary_name":"libsss-idmap0","binary_version":"1.16.1-1ubuntu1.8+esm1"},{"binary_version":"1.16.1-1ubuntu1.8+esm1","binary_name":"libsss-nss-idmap0"},{"binary_version":"1.16.1-1ubuntu1.8+esm1","binary_name":"libsss-simpleifp0"},{"binary_name":"libsss-sudo","binary_version":"1.16.1-1ubuntu1.8+esm1"},{"binary_name":"libwbclient-sssd","binary_version":"1.16.1-1ubuntu1.8+esm1"},{"binary_name":"python-libipa-hbac","binary_version":"1.16.1-1ubuntu1.8+esm1"},{"binary_version":"1.16.1-1ubuntu1.8+esm1","binary_name":"python-libsss-nss-idmap"},{"binary_name":"python-sss","binary_version":"1.16.1-1ubuntu1.8+esm1"},{"binary_name":"python3-libipa-hbac","binary_version":"1.16.1-1ubuntu1.8+esm1"},{"binary_version":"1.16.1-1ubuntu1.8+esm1","binary_name":"python3-libsss-nss-idmap"},{"binary_version":"1.16.1-1ubuntu1.8+esm1","binary_name":"python3-sss"},{"binary_name":"sssd","binary_version":"1.16.1-1ubuntu1.8+esm1"},{"binary_name":"sssd-ad","binary_version":"1.16.1-1ubuntu1.8+esm1"},{"binary_name":"sssd-ad-common","binary_version":"1.16.1-1ubuntu1.8+esm1"},{"binary_version":"1.16.1-1ubuntu1.8+esm1","binary_name":"sssd-common"},{"binary_version":"1.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