CWE - CWE-1279: Cryptographic Operations are run Before Supporting Units are Ready (4.14)

Weakness ID: 1279

Vulnerability Mapping: ALLOWEDThis CWE ID may be used to map to real-world vulnerabilities
Abstraction: BaseBase - a weakness that is still mostly independent of a resource or technology, but with sufficient details to provide specific methods for detection and prevention. Base level weaknesses typically describe issues in terms of 2 or 3 of the following dimensions: behavior, property, technology, language, and resource.

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Description

Performing cryptographic operations without ensuring that the supporting inputs are ready to supply valid data may compromise the cryptographic result.

Extended Description

Many cryptographic hardware units depend upon other hardware units to supply information to them to produce a securely encrypted result. For example, a cryptographic unit that depends on an external random-number-generator (RNG) unit for entropy must wait until the RNG unit is producing random numbers. If a cryptographic unit retrieves a private encryption key from a fuse unit, the fuse unit must be up and running before a key may be supplied.

Relationships

This table shows the weaknesses and high level categories that are related to this weakness. These relationships are defined as ChildOf, ParentOf, MemberOf and give insight to similar items that may exist at higher and lower levels of abstraction. In addition, relationships such as PeerOf and CanAlsoBe are defined to show similar weaknesses that the user may want to explore.

Relevant to the view "Research Concepts" (CWE-1000)

Nature	Type	ID	Name
ChildOf	Class - a weakness that is described in a very abstract fashion, typically independent of any specific language or technology. More specific than a Pillar Weakness, but more general than a Base Weakness. Class level weaknesses typically describe issues in terms of 1 or 2 of the following dimensions: behavior, property, and resource.	665	Improper Initialization
ChildOf	Pillar - a weakness that is the most abstract type of weakness and represents a theme for all class/base/variant weaknesses related to it. A Pillar is different from a Category as a Pillar is still technically a type of weakness that describes a mistake, while a Category represents a common characteristic used to group related things.	691	Insufficient Control Flow Management

Relevant to the view "Hardware Design" (CWE-1194)

Nature	Type	ID	Name
MemberOf	Category - a CWE entry that contains a set of other entries that share a common characteristic.	1205	Security Primitives and Cryptography Issues

Modes Of Introduction

The different Modes of Introduction provide information about how and when this weakness may be introduced. The Phase identifies a point in the life cycle at which introduction may occur, while the Note provides a typical scenario related to introduction during the given phase.

Phase	Note
Architecture and Design
Implementation	The decision to continue using a cryptographic unit even though the input units to it are not producing valid data will compromise the encrypted result.

Applicable Platforms

This listing shows possible areas for which the given weakness could appear. These may be for specific named Languages, Operating Systems, Architectures, Paradigms, Technologies, or a class of such platforms. The platform is listed along with how frequently the given weakness appears for that instance.

Languages

Verilog (Undetermined Prevalence)

VHDL (Undetermined Prevalence)

Class: Not Language-Specific (Undetermined Prevalence)

Operating Systems

Class: Not OS-Specific (Undetermined Prevalence)

Architectures

Class: Not Architecture-Specific (Undetermined Prevalence)

Technologies

Processor Hardware (Undetermined Prevalence)

Class: Not Technology-Specific (Undetermined Prevalence)

Common Consequences

This table specifies different individual consequences associated with the weakness. The Scope identifies the application security area that is violated, while the Impact describes the negative technical impact that arises if an adversary succeeds in exploiting this weakness. The Likelihood provides information about how likely the specific consequence is expected to be seen relative to the other consequences in the list. For example, there may be high likelihood that a weakness will be exploited to achieve a certain impact, but a low likelihood that it will be exploited to achieve a different impact.

Scope	Impact	Likelihood
Access Control Confidentiality Integrity Availability Accountability Authentication Authorization Non-Repudiation	Technical Impact: Varies by Context

Demonstrative Examples

Example 1

The following pseudocode illustrates the weak encryption resulting from the use of a pseudo-random-number generator output.

(bad code)

Example Language: Pseudocode

If random_number_generator_self_test_passed() == TRUE
then Seed = get_random_number_from_RNG()
else Seed = hardcoded_number

In the example above, first a check of RNG ready is performed. If the check fails, the RNG is ignored and a hard coded value is used instead. The hard coded value severely weakens the encrypted output.

(good code)

Example Language: Pseudocode

If random_number_generator_self_test_passed() == TRUE
then Seed = get_random_number_from_RNG()
else enter_error_state()

Potential Mitigations

Phase: Architecture and Design

Best practices should be used to design cryptographic systems.

Phase: Implementation

Continuously ensuring that cryptographic inputs are supplying valid information is necessary to ensure that the encrypted output is secure.

Memberships

This MemberOf Relationships table shows additional CWE Categories and Views that reference this weakness as a member. This information is often useful in understanding where a weakness fits within the context of external information sources.

Nature	Type	ID	Name
MemberOf	Category - a CWE entry that contains a set of other entries that share a common characteristic.	1416	Comprehensive Categorization: Resource Lifecycle Management

Vulnerability Mapping Notes

Usage: ALLOWED

(this CWE ID could be used to map to real-world vulnerabilities)

Reason: Acceptable-Use

Rationale:

This CWE entry is at the Base level of abstraction, which is a preferred level of abstraction for mapping to the root causes of vulnerabilities.

Comments:

Carefully read both the name and description to ensure that this mapping is an appropriate fit. Do not try to 'force' a mapping to a lower-level Base/Variant simply to comply with this preferred level of abstraction.

Related Attack Patterns

CAPEC-ID	Attack Pattern Name
CAPEC-97	Cryptanalysis

Content History

Submissions
Submission Date	Submitter	Organization
2020-02-12 (CWE 4.1, 2020-02-24)	Arun Kanuparthi, Hareesh Khattri, Parbati Kumar Manna, Narasimha Kumar V Mangipudi	Intel Corporation
2020-02-12 (CWE 4.1, 2020-02-24)
Modifications
Modification Date	Modifier	Organization
2020-08-20	CWE Content Team	MITRE
2020-08-20	updated Common_Consequences, Demonstrative_Examples, Description, Maintenance_Notes, Modes_of_Introduction, Name, Potential_Mitigations, Related_Attack_Patterns
2021-03-15	CWE Content Team	MITRE
2021-03-15	updated Maintenance_Notes
2022-04-28	CWE Content Team	MITRE
2022-04-28	updated Applicable_Platforms
2022-06-28	CWE Content Team	MITRE
2022-06-28	updated Applicable_Platforms
2022-10-13	CWE Content Team	MITRE
2022-10-13	updated Demonstrative_Examples
2023-04-27	CWE Content Team	MITRE
2023-04-27	updated Relationships
2023-06-29	CWE Content Team	MITRE
2023-06-29	updated Mapping_Notes
2023-10-26	CWE Content Team	MITRE
2023-10-26	updated Relationships
Previous Entry Names
Change Date	Previous Entry Name
2020-08-20	Cryptographic Primitives used without Successful Self-Test


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Common Weakness Enumeration

CWE-1279: Cryptographic Operations are run Before Supporting Units are Ready

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