Public Data Assigned to Private Array-Typed Field

Assigning public data to a private array is equivalent to giving public access to the array.


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

In the example below, the setRoles() method assigns a publically-controllable array to a private field, thus allowing the caller to modify the private array directly by virtue of the fact that arrays in Java are mutable.

private String[] userRoles;
public void setUserRoles(String[] userRoles) {
  this.userRoles = userRoles;
}

See Also

SFP Secondary Cluster: Tainted Input to Variable

This category identifies Software Fault Patterns (SFPs) within the Tainted Input to Variable cluster (SFP25).

7PK - Encapsulation

This category represents one of the phyla in the Seven Pernicious Kingdoms vulnerability classification. It includes weaknesses that occur when the product does not su...

Comprehensive CWE Dictionary

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

CWE Cross-section

This view contains a selection of weaknesses that represent the variety of weaknesses that are captured in CWE, at a level of abstraction that is likely to be useful t...

Weaknesses Introduced During Implementation

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


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