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P0-F: fail-closed Browser Read admission against active MMS model - #644

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masarray wants to merge 2 commits into
trial/arsas-command-leaf-fabric-20261020from
fix/p0-f-browser-catalog-authority-20261020
Draft

masarray wants to merge 2 commits into
trial/arsas-command-leaf-fabric-20261020from
fix/p0-f-browser-catalog-authority-20261020

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Baseline and exact identity

Stacked on combined FAT candidate #642 at 30a7f18e8e575604eb1306c96753daab9f9c4a51, not main. Inherits ARIEC61850 engine #183 exact c85d4e20db722bd0c2729f2533b323b13d3ef735. No engine repin, command or report control mutation.

Reproduction / root cause

IedBrowserReadPlan.Build previously trusted page.Payload attributes in the DO/LN/DA branches, checking only allowed FC and nonempty MMS reference. After model/association rollover, a detached/stale UI node could supply an unrelated target or spoof its data type. Explicit SV/OR/BL reads must be authorized by the active live model, not by UI payload.

Minimal correction

At read-plan creation, index exact (MMS reference, FC) pairs from the active model's permitted inventory. Re-resolve every selected payload through this catalog; use the catalog's type. Ambiguous duplicate identities fail closed instead of selecting whichever is first. No network I/O, caches, timers, writes, RCB enables or changes to passive focused-read policy.

Regression

P0HBrowserModelInventoryAuthorityTests: stale UI cannot inject OR/BL/CO targets; a forged type is ignored; wrong FC rejected; duplicate model identities fail closed; valid SV/OR/BL/ST remain readable. Existing Browser read coverage/negative tests still required.

Qualification

CODE CHANGED, CI/FAT PENDING. Require exact-head Windows full CI and artifact packaging; then operator-only read-only FAT on authorized IED to prove scalar GVA/typed decode/ledger/UI. Do not infer physical success from regression tests. No main merge, no public release.

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