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Medium severity4.4OSV Advisory· Published Sep 9, 2025· Updated Apr 15, 2026

CVE-2025-59044

CVE-2025-59044

Description

Himmelblau is an interoperability suite for Microsoft Azure Entra ID and Intune. Himmelblau 0.9.x derives numeric GIDs for Entra ID groups from the group display name when himmelblau.conf id_attr_map = name (the default configuration). Because Microsoft Entra ID allows multiple groups with the same displayName (including end-user–created personal/O365 groups, depending on tenant policy), distinct directory groups can collapse to the same numeric GID on Linux. This issue only applies to Himmelblau versions 0.9.0 through 0.9.22. Any resource or service on a Himmelblau-joined host that enforces authorization by numeric GID (files/dirs, etc.) can be unintentionally accessible to a user who creates or joins a different Entra/O365 group that happens to share the same displayName as a privileged security group. Users should upgrade to 0.9.23, or 1.0.0 or later, to receive a patch. Group to GID mapping now uses Entra ID object IDs (GUIDs) and does not collide on same-name groups. As a workaround, use tenant policy hardening to restrict arbitrary group creation until all hosts are patched.

Affected products

1

Patches

2
9776141cad64

Merge commit from fork

https://github.com/himmelblau-idm/himmelblauDavid MulderSep 9, 2025via osv
commit
1 file changed · +1 −1
  • src/common/src/idprovider/himmelblau.rs+1 −1 modified
    @@ -2325,7 +2325,7 @@ impl HimmelblauProvider {
                         .tenant_id()
                         .await
                         .map_err(|e| anyhow!("{:?}", e))?,
-                    &name,
+                    &id.to_string(),
                 )
                 .map_err(|e| anyhow!("Failed fetching gid for {}: {:?}", name, e))?,
             IdAttr::Rfc2307 => match value.extension_attrs.get("gidNumber") {
76c5b41df7f8

Always use the Object Id for mapping Group to GID

https://github.com/himmelblau-idm/himmelblauDavid MulderJul 3, 2025via osv
commit
1 file changed · +1 −1
  • src/common/src/idprovider/himmelblau.rs+1 −1 modified
    @@ -2693,7 +2693,7 @@ impl HimmelblauProvider {
                         .tenant_id()
                         .await
                         .map_err(|e| anyhow!("{:?}", e))?,
-                    &name,
+                    &id.to_string(),
                 )
                 .map_err(|e| anyhow!("Failed fetching gid for {}: {:?}", name, e))?,
             IdAttr::Rfc2307 => match value.extension_attrs.get("gidNumber") {

Vulnerability mechanics

Generated by null/stub on May 9, 2026. Inputs: CWE entries + fix-commit diffs from this CVE's patches. Citations validated against bundle.

References

3

News mentions

0

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