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**Name of the Vulnerable Software and Affected Versions** pdfcrack versions 0.17 through 0.18 **Description** An issue was discovered that allows attackers to execute arbitrary code via a stack overflow in the `MD5` function. **Recommendations** For pdfcrack versions 0.17 through 0.18, update to a version that fixes the issue in the `MD5` function to prevent arbitrary code execution.