ETSI EN 304 623 V0.1.3 (2026-06)

Cyber Security (CYBER); CRA; Cybersecurity requirements for boot managers

DEN/CYBER-EUS-008

General Information

• Status: Not Published
• Technical Committee: CYBER EUSR - European Union Standardization Request
• Current Stage: 6 - End of pre proccessing
• Completion Date: 15-Jun-2026

Standards Content (Sample)

Draft ETSI EN 304 623 V0.1.3 (2026-06)

HARMONISED EUROPEAN STANDARD
Cyber Security (CYBER);
CRA;
Cybersecurity requirements for boot managers

2 Draft ETSI EN 304 623 V0.1.3 (2026-06)

Reference
DEN/CYBER-EUS-008
Keywords
CRA, cybersecurity
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ETSI
3 Draft ETSI EN 304 623 V0.1.3 (2026-06)
Contents
Intellectual Property Rights . 12
Foreword . 12
Modal verbs terminology . 13
Introduction . 13
1 Scope . 14
1.1 General . 14
2 References . 14
2.1 Normative references . 14
2.2 Informative references . 15
3 Definition of terms, symbols and abbreviations . 16
3.1 Terms . 16
3.2 Symbols . 19
3.3 Abbreviations . 19
4 Product context . 20
4.1 Product Functions . 20
4.1.1 Intended purpose . 20
4.1.2 Reasonably foreseeable use . 21
4.1.3 Reasonably foreseeable misuse . 21
4.1.4 General functions . 21
4.2 Product Architecture. 22
4.2.1 Boot architecture . 22
4.2.1.1 Unverified boot . 22
4.2.1.2 Verified boot . 22
4.2.1.3 Measured boot . 23
4.2.2 Functional extensions . 24
4.2.3 Product capabilities . 24
4.2.3.1 Introduction . 24
4.2.3.2 Update capability . 24
4.2.3.3 Boot source . 25
4.2.3.4 Configuration management . 25
4.2.3.5 Hardware security . 26
4.2.3.6 Recovery capability . 26
4.2.3.7 Logging capability . 26
4.2.3.8 Authentication capability . 26
4.2.3.9 Debug interface . 27
4.2.3.10 Key provisioning . 27
4.2.4 Resource constraints . 27
4.3 Operational environment . 28
4.3.1 Introduction. 28
4.3.2 Physical security context . 28
4.3.3 Network exposure . 28
4.3.4 Data sensitivity and value . 28
4.3.5 System criticality . 28
4.3.6 Lifecycle expectations . 29
4.3.7 Administrative control . 29
4.3.8 Availability requirements . 29
4.3.9 Additional environmental characteristics . 29
4.3.9.1 Environmental stress . 29
4.3.9.2 Update frequency expectations . 30
4.3.9.3 Interfaces . 30
4.4 Distribution of security functions . 30
4.4.1 Introduction. 30
4.4.2 Security functions provided by the boot manager . 30
4.4.3 Security functions required from the platform . 31
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4.4.4 Security functions delegated to boot target . 31
4.4.5 Trust boundaries . 31
4.5 Users . 32
4.5.1 Introduction. 32
4.5.2 User categories . 32
4.5.3 User interaction patterns . 32
4.6 Use cases . 33
4.6.1 Purpose . 33
4.6.2 Capabilities as risk exposures . 33
4.6.3 Use case definitions . 33
4.6.3.0 Use cases and security profiles . 33
4.6.3.1 UC-IMM: Immutable . 34
4.6.3.2 UC-VER: Verified and updateable . 34
4.6.3.3 UC-HW: Hardware-assisted security . 34
4.6.4 Functional capabilities and additional requirements . 34
4.6.5 Use case selection . 35
5 Technical requirements for products . 35
5.1 Introduction: Applicability of the requirements . 35
5.1.1 General . 35
5.1.2 Use case declaration. 36
5.1.2.0 Introduction . 36
5.1.2.1 [UC-IMM] . 36
5.1.2.2 [UC-VER] . 36
5.1.2.3 [UC-HW] . 36
5.1.3 Not applicable verdict . 36
5.2 Appropriate level of cybersecurity . 37
5.2.0 Introduction appropriate level of cybersecurity requirements . 37
5.2.1 [REQ-BM-RRM-001] . 37
5.2.2 [REQ-BM-RRM-002] . 37
5.2.3 [REQ-BM-RRM-003] . 37
5.2.4 [REQ-BM-RRM-004] . 37
5.2.5 [REQ-BM-RRM-005] . 37
5.3 No known exploitable vulnerabilities . 38
5.3.0 Introduction to no known exploitable vulnerabilities requirements . 38
5.3.1 [REQ-BM-KEV-001] . 38
5.3.2 [REQ-BM-KEV-002] . 38
5.3.3 [REQ-BM-KEV-003] . 38
5.4 Secure by default configuration . 38
5.4.0 Introduction to secure by default configuration requirements . 38
5.4.1 [REQ-BM-SBD-001] . 38
5.4.2 [REQ-BM-SBD-002] . 39
5.4.3 [REQ-BM-SBD-003] . 39
5.4.4 [REQ-BM-SBD-004] . 39
5.4.5 [REQ-BM-SBD-005] . 39
5.4.6 [REQ-BM-SBD-006] . 39
5.5 Secure updates . 40
5.5.0 Introduction to secure updates requirements . 40
5.5.1 [REQ-BM-SU-001] . 40
5.5.2 [REQ-BM-SU-002] . 40
5.5.3 [REQ-BM-SU-003] . 41
5.5.4 [REQ-BM-SU-004] . 41
5.5.5 [REQ-BM-SU-005] . 41
5.5.6 [REQ-BM-SU-006] . 41
5.5.7 [REQ-BM-SU-007] . 41
5.6 Authentication and access control . 41
5.6.0 Introduction to authentication and access control requirements . 41
5.6.1 [REQ-BM-AC-001] . 41
5.6.2 [REQ-BM-AC-002] . 42
5.6.3 [REQ-BM-AC-003] . 42
5.6.4 [REQ-BM-AC-004] . 42
5.6.5 [REQ-BM-AC-005] . 42
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5.6.6 [REQ-BM-AC-006] . 42
5.6.7 [REQ-BM-AC-007] . 43
5.6.8 [REQ-BM-AC-008] . 43
5.6.9 [REQ-BM-AC-009] . 43
5.6.10 [REQ-BM-AC-010] . 43
5.6.11 [REQ-BM-AC-011] . 43
5.7 Confidentiality protection . 43
5.7.0 Introduction to confidentiality protection requirements. 43
5.7.1 [REQ-BM-CP-001] . 44
5.7.2 [REQ-BM-CP-002] . 44
5.7.3 [REQ-BM-CP-003] . 44
5.7.4 [REQ-BM-CP-004] . 44
5.7.5 [REQ-BM-CP-005] . 44
5.7.6 [REQ-BM-CP-006] . 45
5.7.7 [REQ-BM-CP-007] . 45
5.7.8 [REQ-BM-CP-008] . 45
5.7.9 [REQ-BM-CP-009] . 45
5.7.10 [REQ-BM-CP-010] . 45
5.8 Integrity protection . 45
5.8.0 Introduction to integrity protection requirements . 45
5.8.1 [REQ-BM-INT-001] . 46
5.8.2 [REQ-BM-INT-002] . 46
5.8.3 [REQ-BM-INT-003] . 46
5.8.4 [REQ-BM-INT-004] . 46
5.8.5 [REQ-BM-INT-005] . 47
5.8.6 [REQ-BM-INT-006] . 47
5.8.7 [REQ-BM-INT-007] . 47
5.8.8 [REQ-BM-INT-008] . 47
5.8.9 [REQ-BM-INT-009] . 47
5.8.10 [REQ-BM-INT-010] . 47
5.8.11 [REQ-BM-INT-011] . 47
5.8.12 [REQ-BM-INT-012] . 48
5.8.13 [REQ-BM-INT-013] . 48
5.8.14 [REQ-BM-INT-014] . 48
5.8.15 [REQ-BM-INT-015] . 48
5.8.16 [REQ-BM-INT-016] . 48
5.8.17 [REQ-BM-INT-017] . 48
5.8.18 [REQ-BM-INT-018] . 49
5.8.19 [REQ-BM-INT-019] . 49
5.8.20 [REQ-BM-INT-020] . 49
5.8.21 [REQ-BM-INT-021] . 49
5.8.22 [REQ-BM-INT-022] . 50
5.8.23 [REQ-BM-INT-023] . 50
5.8.24 [REQ-BM-INT-024] . 50
5.9 Data minimisation . 50
5.9.0 Introduction to data minimisation requirements . 50
5.9.1 [REQ-BM-DM-001] . 50
5.9.2 [REQ-BM-DM-002] . 50
5.10 Availability protection . 51
5.10.0 Introduction to availability protection requirements . 51
5.10.1 [REQ-BM-AP-001] . 51
5.10.2 [REQ-BM-AP-002] . 51
5.10.3 [REQ-BM-AP-003] . 51
5.10.4 [REQ-BM-AP-004] . 51
5.10.5 [REQ-BM-AP-005] . 51
5.10.6 [REQ-BM-AP-006] . 52
5.10.7 [REQ-BM-AP-007] . 52
5.10.8 [REQ-BM-AP-008] . 52
5.10.9 [REQ-BM-AP-009] . 52
5.10.10 [REQ-BM-AP-010] . 53
5.10.11 [REQ-BM-AP-011] . 53
5.10.12 [REQ-BM-AP-012] . 53
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5.10.13 [REQ-BM-AP-013] . 53
5.10.14 [REQ-BM-AP-014] . 53
5.10.15 [REQ-BM-AP-015] . 53
5.10.16 [REQ-BM-AP-016] . 53
5.11 Non-interference . 54
5.11.0 Introduction to impact minimisation requirements . 54
5.11.1 [REQ-BM -IM-001] . 54
5.12 Attack surface minimisation . 54
5.12.0 Introduction to attack surfaces minimisation requirements . 54
5.12.1 [REQ-BM-AMS-001] . 54
5.12.2 [REQ-BM-AMS-002] . 54
5.12.3 [REQ-BM-AMS-003] . 55
5.12.4 [REQ-BM-AMS-004] . 55
5.12.5 [REQ-BM-AMS-005] . 55
5.12.6 [REQ-BM-AMS-006] . 55
5.12.7 [REQ-BM-AMS-007] . 56
5.13 Exploit mitigation . 56
5.13.0 Introduction to exploit mitigation requirements . 56
5.13.1 [REQ-BM-EM-001]. 56
5.14 Monitoring . 56
5.14.0 Introduction to monitoring requirements . 56
5.14.1 [REQ-BM-MON-001] . 56
5.14.2 [REQ-BM-MON-002] . 56
5.14.3 [REQ-BM-MON-003] . 57
5.14.4 [REQ-BM-MON-004] . 57
5.14.5 [REQ-BM-MON-005] . 57
5.15 Factory reset and data portability . 57
5.15.0 Introduction. 57
5.15.1 [REQ-BM-FRDP-001]. 58
6 Assessment criteria for compliance with technical requirement . 58
6.1 Introduction to the assessment and compliance criteria . 58
6.1.0 Assessment criteria general structure . 58
6.1.1 Boot manager assessment considerations . 60
6.1.2 Scope of assessment. 60
6.1.3 Assessment report requirements . 60
6.2 Appropriate level of cybersecurity . 61
6.2.0 Overview of requirements addressed in clause 6.2 . 61
6.2.1 [ACC-BM-RRM-001] . 61
6.2.2 [ACC-BM-RRM-002] . 61
6.2.3 [ACC-BM-RRM-003] . 62
6.2.4 [ACC-BM-RRM-004] . 63
6.2.5 [ACC-BM-RRM-005] . 63
6.3 No known exploitable vulnerabilities . 64
6.3.0 Overview of requirements addressed in clause 6.3 . 64
6.3.1 [ACC-BM-KEV-001] . 64
6.3.2 [ACC-BM-KEV-002] . 65
6.3.3 [ACC-BM-KEV-003] . 66
6.4 Secure by default configuration . 67
6.4.0 Overview of requirements addressed in clause 6.4 . 67
6.4.1 [ACC-BM-SBD-001]. 67
6.4.2 [ACC-BM-SBD-002]. 67
6.4.3 [ACC-BM-SBD-003]. 68
6.4.4 [ACC-BM-SBD-004]. 69
6.4.5 [ACC-BM-SBD-005]. 70
6.4.6 [ACC-BM-SBD-006]. 70
6.5 Secure updates . 71
6.5.0 Overview of requirements addressed in clause 6.5 . 71
6.5.1 [ACC-BM-SU-001] . 71
6.5.2 [ACC-BM-SU-002] . 72
6.5.3 [ACC-BM-SU-003] . 73
6.5.4 [ACC-BM-SU-004] . 73
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6.5.5 [ACC-BM-SU-005] . 74
6.5.6 [ACC-BM-SU-006] . 75
6.5.7 [ACC-BM-SU-007] . 76
6.6 Authentication and access control . 76
6.6.0 Overview of requirements addressed in clause 6.6 . 76
6.6.1 [ACC-BM-AC-001] . 77
6.6.2 [ACC-BM-AC-002] . 78
6.6.3 [ACC-BM-AC-003] . 78
6.6.4 [ACC-BM-AC-004] . 79
6.6.5 [ACC-BM-AC-005] . 80
6.6.6 [ACC-BM-AC-006] . 80
6.6.7 [ACC-BM-AC-007] . 81
6.6.8 [ACC-BM-AC-008] . 82
6.6.9 [ACC-BM-AC-009] . 83
6.6.10 [ACC-BM-AC-010] . 83
6.6.11 [ACC-BM-AC-011] . 84
6.7 Confidentiality protection . 85
6.7.0 Overview of requirements addressed in clause 6.7 . 85
6.7.1 [ACC-BM-CP-001] . 85
6.7.2 [ACC-BM-CP-002] . 86
6.7.3 [ACC-BM-CP-003] . 87
6.7.4 [ACC-BM-CP-004] . 87
6.7.5 [ACC-BM-CP-005] .
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