Potential fix for code scanning alert no. 5: Uncontrolled data used in path expression

src/analyzer/code_analyzer.py

@@ -1,9 +1,10 @@
 import logging
 import os
+import re
 from datetime import datetime
 from functools import lru_cache
-from typing import Any, Dict, List, Set
 from pathlib import Path
+from typing import Any, Dict, List, Set
 
 import git
 
@@ -64,21 +65,30 @@ def __init__(self) -> None:
 
     async def analyze_code(self, code_content: str, filename: str) -> VulnerabilityReport:
         """
-        Analyze a single file for security vulnerabilities with improved validation
+        Analyze a single file for security vulnerabilities with improved validation.
+        Empty files are ignored and return an empty report.
 
         Args:
             code_content: The code content to analyze
             filename: The name of the file
 
         Returns:
-            VulnerabilityReport: The vulnerability report
-
-        Raises:
-            ValueError: If code content is empty or invalid
+            VulnerabilityReport: The vulnerability report, empty for empty files
         """
 
-        if not code_content or not filename:
-            raise ValueError("Code content and filename are required")
+        # Check for empty file
+        if not code_content or not isinstance(code_content, str) or code_content.isspace():
+            logging.info(f"Skipping empty file: {filename}")
+            return VulnerabilityReport(
+                file_name=filename,
+                vulnerabilities=[],
+                chained_vulnerabilities=[],
+                timestamp=datetime.now()
+            )
+
+        # Validate filename
+        if not filename or not isinstance(filename, str) or filename.isspace():
+            raise ValueError("Filename must be a non-empty string")
 
         # Parse the code to get relevant information
         try:
@@ -370,14 +380,14 @@ def _process_ai_response(self, analysis_result: Dict[str, Any]) -> List[Vulnerab
                         'CROSS_SITE_SCRIPT': VulnerabilityType.CROSS_SITE_SCRIPTING,
                         'SQL_INJECTION_VULNERABILITY': VulnerabilityType.SQL_INJECTION,
                         'SQLI': VulnerabilityType.SQL_INJECTION,
-                        'RCE': VulnerabilityType.REMOTE_CODE_EXECUTION_RCE,
-                        'REMOTE_CODE_EXEC': VulnerabilityType.REMOTE_CODE_EXECUTION_RCE,
+                        'RCE': VulnerabilityType.REMOTE_CODE_EXECUTION,
+                        'REMOTE_CODE_EXEC': VulnerabilityType.REMOTE_CODE_EXECUTION,
                         'COMMAND_EXEC': VulnerabilityType.OS_COMMAND_INJECTION,
                         'OS_COMMAND_EXEC': VulnerabilityType.OS_COMMAND_INJECTION,
                         'PATH_TRAVERSAL_VULNERABILITY': VulnerabilityType.PATH_TRAVERSAL,
                         'DIRECTORY_TRAVERSAL': VulnerabilityType.PATH_TRAVERSAL,
-                        'IDOR': VulnerabilityType.INSECURE_DIRECT_OBJECT_REFERENCE_IDOR,
-                        'DIRECT_OBJECT_REFERENCE': VulnerabilityType.INSECURE_DIRECT_OBJECT_REFERENCE_IDOR,
+                        'IDOR': VulnerabilityType.INSECURE_DIRECT_OBJECT_REFERENCE,
+                        'DIRECT_OBJECT_REFERENCE': VulnerabilityType.INSECURE_DIRECT_OBJECT_REFERENCE,
                     }
 
                     original_type = vuln_data['type']
@@ -909,8 +919,23 @@ async def _fetch_repository(self, repo_url: str, branch: str) -> str:
             str: The local path to the cloned or fetched repository
         """
 
+        # Validate the repo_url format
+        if not re.match(r'^https?://', repo_url):
+            raise ValueError("Invalid repository URL")
+
         repo_name = repo_url.split('/')[-1].replace('.git', '')
-        repo_path = os.path.join('/tmp', repo_name)  # Temporary directory for the repo
+
+        # Get system-appropriate temporary directory
+        if os.name == 'nt':  # Windows
+            temp_dir = os.path.join(os.environ.get('TEMP') or os.environ.get('TMP') or 'C:\\Windows\\Temp')
+        else:  # Unix-like systems
+            temp_dir = '/tmp'
+
+        repo_path = os.path.normpath(os.path.join(temp_dir, repo_name))
+
+        # Ensure the repo_path is within the temp directory
+        if not os.path.commonprefix([temp_dir, repo_path]) == temp_dir:
+            raise ValueError("Invalid repository path")
 
         if os.path.exists(repo_path):
             # If the repository already exists, fetch the latest changes

src/main.py

@@ -82,4 +82,4 @@ async def health_check() -> dict:
 
 def main():
     # Run the FastAPI app
-    uvicorn.run("main:app", host="0.0.0.0", port=8000, reload=True)
+    uvicorn.run("main:app", host="127.0.0.1", port=8000, reload=True)

src/models/vulnerability.py

@@ -68,6 +68,7 @@ class VulnerabilityType(str, Enum):
     INJECTION_FLAW = "INJECTION_FLAW"
     SECURE_COOKIE = "SECURE_COOKIE"
     INSECURE_CONFIGURATION_SETTING = "INSECURE_CONFIGURATION_SETTING"
+    INFORMATION_EXPOSURE_THROUGH_ERROR_MESSAGES = "INFORMATION_EXPOSURE_THROUGH_ERROR_MESSAGES"
 
     def is_related_to(self, other: 'VulnerabilityType') -> bool:
         """