CWE

Common Weakness Enumeration

A Community-Developed List of Software Weakness Types

CWE/SANS Top 25 Most Dangerous Software Errors
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ID

CWE-587: Assignment of a Fixed Address to a Pointer

Weakness ID: 587
Abstraction: Base
Status: Draft
Presentation Filter:
+ Description

Description Summary

The software sets a pointer to a specific address other than NULL or 0.

Extended Description

Using a fixed address is not portable because that address will probably not be valid in all environments or platforms.

+ Time of Introduction
  • Architecture and Design
  • Implementation
+ Applicable Platforms

Languages

C

C++

C#

Assembly

+ Common Consequences
ScopeEffect
Integrity
Confidentiality
Availability

Technical Impact: Execute unauthorized code or commands

If one executes code at a known location, an attacker might be able to inject code there beforehand.

Availability

Technical Impact: DoS: crash / exit / restart

If the code is ported to another platform or environment, the pointer is likely to be invalid and cause a crash.

Confidentiality
Integrity

Technical Impact: Read memory; Modify memory

The data at a known pointer location can be easily read or influenced by an attacker.

+ Demonstrative Examples

Example 1

This code assumes a particular function will always be found at a particular address. It assigns a pointer to that address and calls the function.

(Bad Code)
Example Language:
int (*pt2Function) (float, char, char)=0x08040000;
int result2 = (*pt2Function) (12, 'a', 'b');
// Here we can inject code to execute.

The same function may not always be found at the same memory address. This could lead to a crash, or an attacker may alter the memory at the expected address, leading to arbitrary code execution.

+ Potential Mitigations

Phase: Implementation

Never set a pointer to a fixed address.

+ Weakness Ordinalities
OrdinalityDescription
Primary
(where the weakness exists independent of other weaknesses)
+ Relationships
NatureTypeIDNameView(s) this relationship pertains toView(s)
ChildOfWeakness BaseWeakness Base344Use of Invariant Value in Dynamically Changing Context
Research Concepts (primary)1000
ChildOfCategoryCategory465Pointer Issues
Development Concepts (primary)699
ChildOfCategoryCategory738CERT C Secure Coding Section 04 - Integers (INT)
Weaknesses Addressed by the CERT C Secure Coding Standard (primary)734
ChildOfWeakness ClassWeakness Class758Reliance on Undefined, Unspecified, or Implementation-Defined Behavior
Research Concepts1000
ChildOfCategoryCategory872CERT C++ Secure Coding Section 04 - Integers (INT)
Weaknesses Addressed by the CERT C++ Secure Coding Standard (primary)868
ChildOfCategoryCategory998SFP Secondary Cluster: Glitch in Computation
Software Fault Pattern (SFP) Clusters (primary)888
MemberOfViewView884CWE Cross-section
CWE Cross-section (primary)884
+ Taxonomy Mappings
Mapped Taxonomy NameNode IDFitMapped Node Name
CERT C Secure CodingINT11-CTake care when converting from pointer to integer or integer to pointer
CERT C++ Secure CodingINT11-CPPTake care when converting from pointer to integer or integer to pointer
Software Fault PatternsSFP1Glitch in computation
+ White Box Definitions

A weakness where code path has:

1. end statement that assigns an address to a pointer

2. start statement that defines the address and the address is a literal value

+ Content History
Modifications
Modification DateModifierOrganizationSource
2008-07-01Eric DalciCigitalExternal
updated Time_of_Introduction
2008-08-01KDM AnalyticsExternal
added/updated white box definitions
2008-09-08CWE Content TeamMITREInternal
updated Applicable_Platforms, Description, Relationships, Other_Notes, Weakness_Ordinalities
2008-11-24CWE Content TeamMITREInternal
updated Relationships, Taxonomy_Mappings
2009-03-10CWE Content TeamMITREInternal
updated Relationships
2009-07-27CWE Content TeamMITREInternal
updated Common_Consequences, Description, Other_Notes
2011-06-01CWE Content TeamMITREInternal
updated Common_Consequences
2011-09-13CWE Content TeamMITREInternal
updated Relationships, Taxonomy_Mappings
2012-05-11CWE Content TeamMITREInternal
updated Demonstrative_Examples, Relationships
2014-07-30CWE Content TeamMITREInternal
updated Relationships, Taxonomy_Mappings

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Page Last Updated: May 05, 2017