Video Frames

Script has command injection vulnerabilities through unsanitized user inputs passed to ffmpeg and mkdir commands, allowing arbitrary command execution.

Security Analysis

This script has critical security vulnerabilities despite some good practices. The main issues are: (1) The 'index' parameter is directly interpolated into an ffmpeg filter expression without validation, allowing command injection via shell metacharacters. (2) The 'time' parameter is passed unsanitized to ffmpeg's -ss flag. (3) The 'out' parameter can contain path traversal sequences or command injection attempts through the mkdir and ffmpeg commands. An attacker could exploit these by providing malicious inputs like: --index '0);$(malicious_command);echo $(' or --out '/tmp/file.jpg;malicious_command;'. While the script uses quotes around variables (good practice), it doesn't validate input format or content. The script also allows unrestricted filesystem access to read any video file and write anywhere. To be production-safe, all user inputs must be validated against strict patterns (regex for index as digits only, time as HH:MM:SS format, output path within allowed directories). The trust score of 45 reflects critical command injection risks that could lead to arbitrary code execution.

Security Findings

✅ Good Security Practices

• ✓Uses 'set -euo pipefail' for safer error handling
• ✓Variables are quoted to prevent word splitting
• ✓Checks if input file exists before processing
• ✓Uses -hide_banner and -loglevel error to reduce output verbosity
• ✓Provides clear usage documentation