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In OpenStack Nova before 33.0.2, the server create API does not strip certain hint data. The resulting instance has no Placement allocation.
CVSS re-evaluation: RH score updated from 6.5 (Moderate) to 8.5 (Important) to align with NIST. The original RH vector (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H = 6.5) was auto-populated by AEGIS with no manual analysis. Lucas Celant flagged a 2.0-point discrepancy crossing the Medium/High severity boundary against NIST's score (AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H = 8.5). Two metrics were re-evaluated: - Scope (S:U → S:C): The scheduler hint injection bypasses Placement and scheduling constraints, allowing a tenant to affect co-located tenants' resource availability and potentially escape AZ/host aggregate isolation. This crosses the tenant security boundary, justifying Changed scope. - Integrity (I:N → I:L): The missing Placement allocations cause the resource accounting state in the Placement service to no longer reflect reality. Instances exist on compute nodes but are untracked, corrupting the integrity of the resource management subsystem. Updated vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H = 8.5 (Important).