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.

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.

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.

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.

These are all security issues fixed in the himmelblau-0.9.17+git.0.4a97692-1.1 package on the GA media of openSUSE Tumbleweed.

This update for himmelblau fixes the following issues:

Update to version 2.3.9+git0.a9fd29b; (jsc#PED-14511):

• CVE-2026-34397: Fix LPE due to name collision during NSS fake-primary group lookup (bsc#1261324).
• CVE-2026-31979: Fix race condition when accessiung /tmp/krb5cc_uid (bsc#1259548).
• CVE-2026-25727: deps(rust): Bump the all-cargo-updates group with 8 updates (bsc#1257904).
• CVE-2025-58160: deps(rust): Bump tracing-subscriber in the cargo group (bsc#1249013).
• CVE-2025-54882: Fix Kerberos credential cache permissions (bsc#1247735).
• CVE-2025-53013: Fix permitted authentication with invalid Hello PIN (bsc#1245437).
• CVE-2024-11738: Fix rustls network-reachable panic in Acceptor::accept (bsc#1233949).

Other bug fixes:

• Fix SELinux module packaging to use standard policy macros (bsc#1258236).