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Failing to correctly handle all failure cases when working with closeable resources may result in some resources not being closed or in important exceptions being masked, possibly resulting in a denial of service. Note that failure to use a try-with-resources statement cannot be considered a security vulnerability in and of itself because it is possible to write a correctly structured group of nested try-catch-finally blocks guarding the resources that are in use (see ERR05-J. Do not let checked exceptions escape from a finally block). That said, failure to correctly handle such error cases is a common source of vulnerabilities. Use of a try-with-resources statement mitigates this issue by guaranteeing that the resources are managed correctly and that exceptions are never masked.
Automated Detection
| Tool | Version | Checker | Description | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Parasoft Jtest | 
 | CERT.ERR54.CLFIN | Avoid using finally block for closing resource only | ||||||
| SonarQube | 
 | S2093 | 
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Bibliography
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