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Low 30 Bitcoin

feat(core): introduce explicit manufacturing mode exit

Public commit record

What the developer wrote

Authored by tychovrahe

62/100 · Adequate
feat(core): introduce explicit manufacturing mode exit
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope! No meaningful explanatory body
The short version

What changed, and why it matters

This commit adds a new factory/production tool command that permanently exits 'manufacturing mode' by writing and locking a special one-time-programmable memory block. It also reorganizes how each Trezor model defines its OTP memory layout and unit properties. The change is a feature addition for the production-test firmware, not a fix for a known exploitable bug in user-facing firmware. It does not appear to introduce an obvious vulnerability, but it changes security-relevant manufacturing state logic.

Recommended action

Review the manufacturing-lock write command for authorization checks and ensure it is only reachable in factory/production firmware. Verify that the `locked` property logic correctly handles partially-written T3W1 units and does not accidentally lock out legitimate manufacturing operations or enable unintended mode transitions. Confirm that `unit_properties_deinit()` properly zeroizes sensitive cached data.

Security signals we found

01

Adds permanent OTP lock command in production-test firmware

02

Changes how 'manufacturing mode' vs 'normal mode' is detected across models

03

Introduces model-specific OTP layout definitions

04

Adds T3W1-specific manufacturing-lock compatibility logic

05

Touches security-relevant unit_properties driver and flash OTP code

Risk score

Why this scored 30/100

Our methodology →
Potential impact 8/30
Exploitability 4/25
Stealth signal 3/15
Affected reach 5/15
Confidence 7/10
Evidence quality 3/5
Human-validated context

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