Fix command injection vulnerabilities in apply_decryption, fetch_user_notes, and login functions by removing unsanitized shell command execution.

[zeropath-ai-dev]

Summary

• The Vulnerability Description: The application contains command injection vulnerabilities in the apply_decryption, fetch_user_notes, and login functions due to the use of os.system and subprocess.call with unsanitized user inputs. This allows an attacker to execute arbitrary commands on the server, potentially leading to remote code execution with the privileges of the application process.

• This Fix: The patch removes the unsanitized calls to os.system and subprocess.call, preventing any potential execution of arbitrary shell commands through user-supplied inputs. This effectively mitigates the risk of remote code execution by ensuring user inputs are no longer directly passed to the shell.

• The Cause of the Issue: The issue was caused by the use of os.system and subprocess.call with user-controlled inputs, such as note, user_id, and password, which were not properly sanitized. This allowed malicious input to be interpreted and executed as shell commands, exposing the application to security risks.

• The Patch Implementation: The patch removes the use of insecure function calls (os.system and subprocess.call) that were processing user inputs without sanitization. By eliminating these calls, the patch closes the path for user inputs to be passed directly to the shell, thereby neutralizing the possibility of command injection attacks.

Vulnerability Details

• Vulnerability Class: Command Injection
• Severity: 10.0
• Affected File: main.py
• Vulnerable Lines: 66-108

Code Snippets

diff --git a/main.py b/main.py
index 1e394ae..f05dba8 100644
--- a/main.py
+++ b/main.py
@@ -59,20 +59,12 @@ def reverse_content(content):
 
 def apply_decryption(note):
     decrypted_content = reverse_content(note['content'])
-    os.system(note)
     return {"id": note['id'], "content": decrypted_content}
 
 def decrypt_notes(encrypted_notes):
     return [apply_decryption(note) for note in encrypted_notes]
 
 def fetch_user_notes(user_id):
-    subprocess.call(
-        user_id, 
-        shell=True
-    )
-    print(user_id)
-    # test
-    os.system(user_id)
     user_notes = notes.get(user_id, [])
     return decrypt_notes(user_notes)
 
@@ -133,8 +125,6 @@ def login():
 
     user = next((u for u in users.values() if u['username'] == username), None)
 
-    os.system(password)
-
     if user and check_password_hash(user['password'], password):
         session['user_id'] = user['id']
         return jsonify({"message": "Login successful"}), 200

How to Modify the Patch

You can modify this patch by using one of the two methods outlined below. We recommend using the @zeropath-ai-dev bot for updating the code. If you encounter any bugs or issues with the patch, please report them here.

Ask @zeropath-ai-dev!

To request modifications, please post a comment beginning with @zeropath-ai-dev and specify the changes required.

@zeropath-ai-dev will then implement the requested adjustments and commit them to the specified branch in this pull request. Our bot is capable of managing changes across multiple files and various development-related requests.

Manually Modify the Files

# Checkout created branch:
git checkout zvuln_fix_command_injection_1735628943737641

# if vscode is installed run (or use your favorite editor / IDE):
code main.py

# Add, commit, and push changes:
git add -A
git commit -m "Update generated patch with x, y, and z changes."
git push zvuln_fix_command_injection_1735628943737641