vulnhuntr

docker build -t vulnhuntr https://github.com/protectai/vulnhuntr.git#main

pipx install git+https://github.com/protectai/vulnhuntr.git --python python3.10

git clone https://github.com/protectai/vulnhuntr
cd vulnhuntr && poetry install

usage: vulnhuntr [-h] -r ROOT [-a ANALYZE] [-l {claude,gpt,ollama}] [-v]

Analyze a GitHub project for vulnerabilities. Export your ANTHROPIC_API_KEY/OPENAI_API_KEY before running.

options:
  -h, --help            show this help message and exit
  -r ROOT, --root ROOT  Path to the root directory of the project
  -a ANALYZE, --analyze ANALYZE
                        Specific path or file within the project to analyze
  -l {claude,gpt,ollama}, --llm {claude,gpt,ollama}
                        LLM client to use (default: claude)
  -v, --verbosity       Increase output verbosity (-v for INFO, -vv for DEBUG)

export ANTHROPIC_API_KEY="sk-1234"
vulnhuntr -r /path/to/target/repo/

export OPENAI_API_KEY="sk-1234"
vulnhuntr -r /path/to/target/repo/ -a server.py -l gpt 

docker run --rm -e ANTHROPIC_API_KEY=sk-1234 -e ANTHROPIC_BASE_URL=https://localhost:1234/api -v /local/path/to/target/repo:/repo vulnhuntr:latest -r /repo -a repo-subfolder/target-file.py

export OLLAMA_BASE_URL=http://localhost:11434/api/generate
export OLLAMA_MODEL=llama3.2
vulnhuntr -r /path/to/target/repo/ -a server.py -l ollama

scratchpad:
  1. Analyzing the add_llm function in llm_app.py. 2. Identified user input used as keys to access dictionaries: EmbeddingModel, ChatModel, RerankModel,
CvModel, and TTSModel. 3. These dictionaries contain class references, which are instantiated with user-supplied parameters. 4. The factory variable is 
directly used from user input (req['llm_factory']) without proper validation. 5. The llm_name is also derived from user input in most cases. 6. The 
instantiation of these classes occurs in try-except blocks, but exceptions are only used for error messages, not preventing execution. 7. The api_key 
and other sensitive information are passed directly to these instantiated classes. 8. There's no comprehensive input validation or sanitization for the 
factory or llm_name variables. 9. The vulnerability is in a route decorated with @login_required, indicating it's accessible to authenticated users. 10.
Reviewing the EmbeddingModel, ChatModel, RerankModel, CvModel, and TTSModel dictionaries to understand their contents and potential for exploitation.
----------------------------------------

analysis:
  The add_llm function in llm_app.py contains a critical Remote Code Execution (RCE) vulnerability. The function uses user-supplied input 
(req['llm_factory'] and req['llm_name']) to dynamically instantiate classes from the EmbeddingModel, ChatModel, RerankModel, CvModel, and TTSModel 
dictionaries. This pattern of using user input as a key to access and instantiate classes is inherently dangerous, as it allows an attacker to 
potentially execute arbitrary code. The vulnerability is exacerbated by the lack of comprehensive input validation or sanitization on these 
user-supplied values. While there are some checks for specific factory types, they are not exhaustive and can be bypassed. An attacker could potentially
provide a malicious value for 'llm_factory' that, when used as an index to these model dictionaries, results in the execution of arbitrary code. The 
vulnerability is particularly severe because it occurs in a route decorated with @login_required, suggesting it's accessible to authenticated users, 
which might give a false sense of security.
----------------------------------------

poc:
  POST /add_llm HTTP/1.1
  Host: target.com
  Content-Type: application/json
  Authorization: Bearer <valid_token>
  
  {
      "llm_factory": "__import__('os').system",
      "llm_name": "id",
      "model_type": "EMBEDDING",
      "api_key": "dummy_key"
  }
  
  This payload attempts to exploit the vulnerability by setting 'llm_factory' to a string that, when evaluated, imports the os module and calls system. 
The 'llm_name' is set to 'id', which would be executed as a system command if the exploit is successful.
----------------------------------------

confidence_score:
  8
----------------------------------------

vulnerability_types:
  - RCE
----------------------------------------