Unchecked Error Condition

[PLANNED FOR DEPRECATION. SEE MAINTENANCE NOTES.] Ignoring exceptions and other error conditions may allow an attacker to induce unexpected behavior unnoticed.


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 excerpt ignores a rarely-thrown exception from doExchange().

try {
  doExchange();
}
catch (RareException e) {


  // this can never happen


}

If a RareException were to ever be thrown, the program would continue to execute as though nothing unusual had occurred. The program records no evidence indicating the special situation, potentially frustrating any later attempt to explain the program's behavior.

See Also

SEI CERT C Coding Standard - Guidelines 50. POSIX (POS)

Weaknesses in this category are related to the rules and recommendations in the POSIX (POS) section of the SEI CERT C Coding Standard.

SEI CERT C Coding Standard - Guidelines 12. Error Handling (ERR)

Weaknesses in this category are related to the rules and recommendations in the Error Handling (ERR) section of the SEI CERT C Coding Standard.

SEI CERT C Coding Standard - Guidelines 05. Floating Point (FLP)

Weaknesses in this category are related to the rules and recommendations in the Floating Point (FLP) section of the SEI CERT C Coding Standard.

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 Introduced During Design

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


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