CVE-2025-53013 SUSE CVE security@suse.de SUSE Security Team SUSE CVE-2025-53013 Interim 1 3 2026-03-05T00:31:21Z current 2025-07-12T06:33:50Z 2026-03-05T00:31:21Z cve-database/bin/generate-cvrf-cve.pl 2020-12-27T01:00:00Z CVE-2025-53013 Himmelblau is an interoperability suite for Microsoft Azure Entra ID and Intune. A vulnerability present in versions 0.9.10 through 0.9.16 allows a user to authenticate to a Linux host via Himmelblau using an *invalid* Linux Hello PIN, provided the host is offline. While the user gains access to the local system, Single Sign-On (SSO) fails due to the network being down and the inability to issue tokens (due to a failure to unlock the Hello key). The core issue lies in an incorrect assumption within the `acquire_token_by_hello_for_business_key` function: it was expected to return a `TPMFail` error for an invalid Hello key when offline, but instead, a preceding nonce request resulted in a `RequestFailed` error, leading the system to erroneously transition to an offline success state without validating the Hello key unlock. This impacts systems using Himmelblau for authentication when operating in an offline state with Hello PIN authentication enabled. Rocky Linux 8 (and variants) are not affected by this vulnerability. The problem is resolved in Himmelblau version 0.9.17. A workaround is available for users who cannot immediately upgrade. Disabling Hello PIN authentication by setting `enable_hello = false` in `/etc/himmelblau/himmelblau.conf` will mitigate the vulnerability. The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). https://www.suse.com/support/security/rating/ SUSE Security Ratings SUSE Linux Enterprise Module for Basesystem 15 SP7 SUSE Linux Enterprise Module for Basesystem 15 SP7 SUSE Linux Enterprise Module for Basesystem 15 SP7 SUSE Linux Enterprise Server 16.0 SUSE Linux Enterprise Module for Basesystem 15 SP7 openSUSE Tumbleweed himmelblau himmelblau-0.9.17+git.0.4a97692-1.1 himmelblau-0.9.22+git.0.d41f700-160000.1.2 himmelblau-qr-greeter-0.9.17+git.0.4a97692-1.1 himmelblau-qr-greeter-0.9.22+git.0.d41f700-160000.1.2 himmelblau-sshd-config himmelblau-sshd-config-0.9.17+git.0.4a97692-1.1 himmelblau-sshd-config-0.9.22+git.0.d41f700-160000.1.2 himmelblau-sso-0.9.17+git.0.4a97692-1.1 himmelblau-sso-0.9.22+git.0.d41f700-160000.1.2 libnss_himmelblau2 libnss_himmelblau2-0.9.17+git.0.4a97692-1.1 libnss_himmelblau2-0.9.22+git.0.d41f700-160000.1.2 pam-himmelblau pam-himmelblau-0.9.17+git.0.4a97692-1.1 pam-himmelblau-0.9.22+git.0.d41f700-160000.1.2 himmelblau-0.9.22+git.0.d41f700-160000.1.2 as a component of SUSE Linux Enterprise Server 16.0 himmelblau-qr-greeter-0.9.22+git.0.d41f700-160000.1.2 as a component of SUSE Linux Enterprise Server 16.0 himmelblau-sshd-config-0.9.22+git.0.d41f700-160000.1.2 as a component of SUSE Linux Enterprise Server 16.0 himmelblau-sso-0.9.22+git.0.d41f700-160000.1.2 as a component of SUSE Linux Enterprise Server 16.0 libnss_himmelblau2-0.9.22+git.0.d41f700-160000.1.2 as a component of SUSE Linux Enterprise Server 16.0 pam-himmelblau-0.9.22+git.0.d41f700-160000.1.2 as a component of SUSE Linux Enterprise Server 16.0 himmelblau-0.9.17+git.0.4a97692-1.1 as a component of openSUSE Tumbleweed himmelblau-qr-greeter-0.9.17+git.0.4a97692-1.1 as a component of openSUSE Tumbleweed himmelblau-sshd-config-0.9.17+git.0.4a97692-1.1 as a component of openSUSE Tumbleweed himmelblau-sso-0.9.17+git.0.4a97692-1.1 as a component of openSUSE Tumbleweed libnss_himmelblau2-0.9.17+git.0.4a97692-1.1 as a component of openSUSE Tumbleweed pam-himmelblau-0.9.17+git.0.4a97692-1.1 as a component of openSUSE Tumbleweed himmelblau as a component of SUSE Linux Enterprise Module for Basesystem 15 SP7 himmelblau-sshd-config as a component of SUSE Linux Enterprise Module for Basesystem 15 SP7 libnss_himmelblau2 as a component of SUSE Linux Enterprise Module for Basesystem 15 SP7 pam-himmelblau as a component of SUSE Linux Enterprise Module for Basesystem 15 SP7 Himmelblau is an interoperability suite for Microsoft Azure Entra ID and Intune. A vulnerability present in versions 0.9.10 through 0.9.16 allows a user to authenticate to a Linux host via Himmelblau using an *invalid* Linux Hello PIN, provided the host is offline. While the user gains access to the local system, Single Sign-On (SSO) fails due to the network being down and the inability to issue tokens (due to a failure to unlock the Hello key). The core issue lies in an incorrect assumption within the `acquire_token_by_hello_for_business_key` function: it was expected to return a `TPMFail` error for an invalid Hello key when offline, but instead, a preceding nonce request resulted in a `RequestFailed` error, leading the system to erroneously transition to an offline success state without validating the Hello key unlock. This impacts systems using Himmelblau for authentication when operating in an offline state with Hello PIN authentication enabled. Rocky Linux 8 (and variants) are not affected by this vulnerability. The problem is resolved in Himmelblau version 0.9.17. A workaround is available for users who cannot immediately upgrade. Disabling Hello PIN authentication by setting `enable_hello = false` in `/etc/himmelblau/himmelblau.conf` will mitigate the vulnerability. CVE-2025-53013 SUSE Linux Enterprise Server 16.0:himmelblau-0.9.22+git.0.d41f700-160000.1.2 SUSE Linux Enterprise Server 16.0:himmelblau-qr-greeter-0.9.22+git.0.d41f700-160000.1.2 SUSE Linux Enterprise Server 16.0:himmelblau-sshd-config-0.9.22+git.0.d41f700-160000.1.2 SUSE Linux Enterprise Server 16.0:himmelblau-sso-0.9.22+git.0.d41f700-160000.1.2 SUSE Linux Enterprise Server 16.0:libnss_himmelblau2-0.9.22+git.0.d41f700-160000.1.2 SUSE Linux Enterprise Server 16.0:pam-himmelblau-0.9.22+git.0.d41f700-160000.1.2 openSUSE Tumbleweed:himmelblau-0.9.17+git.0.4a97692-1.1 openSUSE Tumbleweed:himmelblau-qr-greeter-0.9.17+git.0.4a97692-1.1 openSUSE Tumbleweed:himmelblau-sshd-config-0.9.17+git.0.4a97692-1.1 openSUSE Tumbleweed:himmelblau-sso-0.9.17+git.0.4a97692-1.1 openSUSE Tumbleweed:libnss_himmelblau2-0.9.17+git.0.4a97692-1.1 openSUSE Tumbleweed:pam-himmelblau-0.9.17+git.0.4a97692-1.1 SUSE Linux Enterprise Module for Basesystem 15 SP7:himmelblau SUSE Linux Enterprise Module for Basesystem 15 SP7:himmelblau-sshd-config SUSE Linux Enterprise Module for Basesystem 15 SP7:libnss_himmelblau2 SUSE Linux Enterprise Module for Basesystem 15 SP7:pam-himmelblau moderate 5.2 CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N