Explicit Call to Finalize()

The software makes an explicit call to the finalize() method from outside the finalizer.


Description

While the Java Language Specification allows an object's finalize() method to be called from outside the finalizer, doing so is usually a bad idea. For example, calling finalize() explicitly means that finalize() will be called more than once: the first time will be the explicit call and the last time will be the call that is made after the object is garbage collected.

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 code fragment calls finalize() explicitly:

// time to clean up
widget.finalize();

See Also

SEI CERT Oracle Secure Coding Standard for Java - Guidelines 06. Methods (MET)

Weaknesses in this category are related to the rules and recommendations in the Methods (MET) section of the SEI CERT Oracle Secure Coding Standard for Java.

Bad Coding Practices

Weaknesses in this category are related to coding practices that are deemed unsafe and increase the chances that an exploitable vulnerability will be present in the ap...

SFP Secondary Cluster: Use of an Improper API

This category identifies Software Fault Patterns (SFPs) within the Use of an Improper API cluster (SFP3).

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.

Weaknesses in Software Written in Java

This view (slice) covers issues that are found in Java programs that are not common to all languages.


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