CWE

Common Weakness Enumeration

A Community-Developed List of Software Weakness Types

CWE Top 25 Most Dangerous Software Errors
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ID

CWE-758: Reliance on Undefined, Unspecified, or Implementation-Defined Behavior

Weakness ID: 758
Abstraction: Class
Structure: Simple
Status: Incomplete
Presentation Filter:
+ Description
The software uses an API function, data structure, or other entity in a way that relies on properties that are not always guaranteed to hold for that entity.
+ Extended Description
This can lead to resultant weaknesses when the required properties change, such as when the software is ported to a different platform or if an interaction error (CWE-435) occurs.
+ Relationships

The table(s) below 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)
NatureTypeIDName
ChildOfClassClass - a weakness that is described in a very abstract fashion, typically independent of any specific language or technology. More general than a Base weakness.710Improper Adherence to Coding Standards
ParentOfBaseBase - a weakness that is described in an abstract fashion, but with sufficient details to infer specific methods for detection and prevention. More general than a Variant weakness, but more specific than a Class weakness.474Use of Function with Inconsistent Implementations
ParentOfBaseBase - a weakness that is described in an abstract fashion, but with sufficient details to infer specific methods for detection and prevention. More general than a Variant weakness, but more specific than a Class weakness.562Return of Stack Variable Address
ParentOfBaseBase - a weakness that is described in an abstract fashion, but with sufficient details to infer specific methods for detection and prevention. More general than a Variant weakness, but more specific than a Class weakness.587Assignment of a Fixed Address to a Pointer
ParentOfVariantVariant - a weakness that is described at a very low level of detail, typically limited to a specific language or technology. More specific than a Base weakness.588Attempt to Access Child of a Non-structure Pointer
ParentOfClassClass - a weakness that is described in a very abstract fashion, typically independent of any specific language or technology. More general than a Base weakness.1038Insecure Automated Optimizations
ParentOfBaseBase - a weakness that is described in an abstract fashion, but with sufficient details to infer specific methods for detection and prevention. More general than a Variant weakness, but more specific than a Class weakness.1102Reliance on Machine-Dependent Data Representation
ParentOfBaseBase - a weakness that is described in an abstract fashion, but with sufficient details to infer specific methods for detection and prevention. More general than a Variant weakness, but more specific than a Class weakness.1103Use of Platform-Dependent Third Party Components
ParentOfBaseBase - a weakness that is described in an abstract fashion, but with sufficient details to infer specific methods for detection and prevention. More general than a Variant weakness, but more specific than a Class weakness.1105Insufficient Encapsulation of Machine-Dependent Functionality
+ Relevant to the view "Development Concepts" (CWE-699)
NatureTypeIDName
MemberOfCategoryCategory - a CWE entry that contains a set of other entries that share a common characteristic.1006Bad Coding Practices
ParentOfBaseBase - a weakness that is described in an abstract fashion, but with sufficient details to infer specific methods for detection and prevention. More general than a Variant weakness, but more specific than a Class weakness.474Use of Function with Inconsistent Implementations
ParentOfBaseBase - a weakness that is described in an abstract fashion, but with sufficient details to infer specific methods for detection and prevention. More general than a Variant weakness, but more specific than a Class weakness.562Return of Stack Variable Address
ParentOfBaseBase - a weakness that is described in an abstract fashion, but with sufficient details to infer specific methods for detection and prevention. More general than a Variant weakness, but more specific than a Class weakness.1102Reliance on Machine-Dependent Data Representation
+ Common Consequences

The table below 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.

ScopeImpactLikelihood
Other

Technical Impact: Other

+ Observed Examples
ReferenceDescription
Change in C compiler behavior causes resultant buffer overflows in programs that depend on behaviors that were undefined in the C standard.
+ Weakness Ordinalities
OrdinalityDescription
Indirect
(where the weakness is a quality issue that might indirectly make it easier to introduce security-relevant weaknesses or make them more difficult to detect)
Primary
(where the weakness exists independent of other weaknesses)
+ 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.
NatureTypeIDName
MemberOfCategoryCategory - a CWE entry that contains a set of other entries that share a common characteristic.1001SFP Secondary Cluster: Use of an Improper API
MemberOfCategoryCategory - a CWE entry that contains a set of other entries that share a common characteristic.1157SEI CERT C Coding Standard - Guidelines 03. Expressions (EXP)
MemberOfCategoryCategory - a CWE entry that contains a set of other entries that share a common characteristic.1158SEI CERT C Coding Standard - Guidelines 04. Integers (INT)
MemberOfCategoryCategory - a CWE entry that contains a set of other entries that share a common characteristic.1160SEI CERT C Coding Standard - Guidelines 06. Arrays (ARR)
MemberOfCategoryCategory - a CWE entry that contains a set of other entries that share a common characteristic.1162SEI CERT C Coding Standard - Guidelines 08. Memory Management (MEM)
MemberOfCategoryCategory - a CWE entry that contains a set of other entries that share a common characteristic.1163SEI CERT C Coding Standard - Guidelines 09. Input Output (FIO)
MemberOfCategoryCategory - a CWE entry that contains a set of other entries that share a common characteristic.1167SEI CERT C Coding Standard - Guidelines 12. Error Handling (ERR)
MemberOfCategoryCategory - a CWE entry that contains a set of other entries that share a common characteristic.1170SEI CERT C Coding Standard - Guidelines 48. Miscellaneous (MSC)
+ Taxonomy Mappings
Mapped Taxonomy NameNode IDFitMapped Node Name
CERT C Secure CodingARR32-CCWE More AbstractEnsure size arguments for variable length arrays are in a valid range
CERT C Secure CodingERR34-CImpreciseDetect errors when converting a string to a number
CERT C Secure CodingEXP30-CCWE More AbstractDo not depend on the order of evaluation for side effects
CERT C Secure CodingEXP33-CCWE More AbstractDo not read uninitialized memory
CERT C Secure CodingFIO46-CCWE More AbstractDo not access a closed file
CERT C Secure CodingINT34-CCWE More AbstractDo not shift an expression by a negative number of bits or by greater than or equal to the number of bits that exist in the operand
CERT C Secure CodingINT36-CCWE More AbstractConverting a pointer to integer or integer to pointer
CERT C Secure CodingMEM30-CCWE More AbstractDo not access freed memory
CERT C Secure CodingMSC14-CDo not introduce unnecessary platform dependencies
CERT C Secure CodingMSC15-CDo not depend on undefined behavior
CERT C Secure CodingMSC37-CCWE More AbstractEnsure that control never reaches the end of a non-void function
+ Content History
Submissions
Submission DateSubmitterOrganization
2009-03-03CWE Content TeamMITRE
Modifications
Modification DateModifierOrganization
2011-06-01CWE Content TeamMITRE
updated Common_Consequences
2012-05-11CWE Content TeamMITRE
updated Relationships
2014-07-30CWE Content TeamMITRE
updated Relationships
2017-01-19CWE Content TeamMITRE
updated Relationships
2017-11-08CWE Content TeamMITRE
updated Relationships, Taxonomy_Mappings
2018-03-27CWE Content TeamMITRE
updated Relationships
2019-01-03CWE Content TeamMITRE
updated Relationships, Weakness_Ordinalities
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Page Last Updated: January 03, 2019