Attempt to Access Child of a Non-structure Pointer

Casting a non-structure type to a structure type and accessing a field can lead to memory access errors or data corruption.


Demonstrations

The following examples help to illustrate the nature of this weakness and describe methods or techniques which can be used to mitigate the risk.

Note that the examples here are by no means exhaustive and any given weakness may have many subtle varieties, each of which may require different detection methods or runtime controls.

Example One

The following example demonstrates the weakness.

struct foo
{
  int i;
}
...
int main(int argc, char **argv)
{
  *foo = (struct foo *)main;
  foo->i = 2;
  return foo->i;
}

See Also

Comprehensive Categorization: Resource Lifecycle Management

Weaknesses in this category are related to resource lifecycle management.

SFP Secondary Cluster: Faulty Pointer Use

This category identifies Software Fault Patterns (SFPs) within the Faulty Pointer Use cluster (SFP7).

Comprehensive CWE Dictionary

This view (slice) covers all the elements in CWE.

Weaknesses Introduced During Implementation

This view (slice) lists weaknesses that can be introduced during implementation.


Common Weakness Enumeration content on this website is copyright of The MITRE Corporation unless otherwise specified. Use of the Common Weakness Enumeration and the associated references on this website are subject to the Terms of Use as specified by The MITRE Corporation.