# Declaration of Catch for Generic Exception (CWE-396)

Catching overly broad exceptions defeats the purpose of typed exceptions and can result in unexpected behavior.

- Prevalence: Ciblé 1 langages couverts
- Impact: Moyen Revue recommandée
- Prevention: Documentée 1 exemples de correctifs

**OWASP:** Insecure Design (A04:2021-Insecure Design) - #4

## Description

When exceptions are caught too broadly (e.g., catching Exception instead of specific types), the code may inadvertently catch and suppress exceptions it wasn't designed to handle, hiding bugs or security issues.

## Prevention

### Python

Catch specific exceptions instead of bare except: or except BaseException

## Warning Signs

- [LOW] overly broad exception handlers (bare except: or except BaseException)
that catch system exceptions 

## Consequences

- DoS
- Dissimuler des activités

## Mitigations

- Capturez uniquement les types d'exception spécifiques que vous savez gérer
- Relancez les exceptions que vous ne pouvez pas gérer correctement
- Journalisez les exceptions inattendues avant de les relancer

## Detection

- Total rules: 1
- Languages: python

## Rules by Language

### Python (1 rules)

- **Overly Broad Exception Handler** [LOW]: Detects overly broad exception handlers (bare except: or except BaseException)
that catch system exceptions like KeyboardInterrupt, SystemExit, which should
not be caught in normal error handling.
  - Remediation: Catch specific exceptions or use Exception instead of bare except or BaseException.

```python
try:
    process_data()
except ValueError as e:
    logger.error(f"Invalid value: {e}")
except IOError as e:
    logger.error(f"IO error: {e}")
```

Learn more: https://shoulder.dev/learn/python/cwe-396/broad-exception