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Fix path creation causing directory traversal #6

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Fix path creation causing directory traversal #6

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9 changes: 7 additions & 2 deletions web/download.php
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Original file line number Diff line number Diff line change
Expand Up @@ -7,9 +7,14 @@
die("Missing required parameters");
}

// This prevents command injection and directory traversal attacks.
if (!preg_match('/^[a-zA-Z0-9_-]+$/', $agent_id)) {
die("Invalid agent id format");
}

// Construct full path
$base_path = "/rtMount/$agent_id";
$full_path = "$base_path/$path";
$full_path = realpath($base_path . '/' . $path);

// Security checks
if (!str_starts_with(realpath($full_path), realpath($base_path))) {
Expand Down Expand Up @@ -38,4 +43,4 @@
echo fread($handle, 8192);
flush();
}
fclose($handle);
fclose($handle);