Land rapid7#8282, Add module doc for auxiliary/scanner/chargen/chargen_probe

Author: wchen-r7

documentation/modules/auxiliary/scanner/chargen/chargen_probe.md

@@ -0,0 +1,50 @@
+## Vulnerable Application
+
+Chargen is a debugging and measurement tool and a character generator service.  Often `chargen` is included in `xinetd`,
+along with `echo`, `time`, `daytime`, and `discard`.
+While its possible to run chargen on TCP, the most common implementation is UDP.
+
+The following was done on Kali linux:
+  
+  1. `apt-get install xinetd`
+  2. edit `/etc/xinetd.d/chargen` and changed `disabled = yes` to `disabled = no`.  The first one is for `TCP` and the second is for `UDP`.
+  3. Restart the service: `service xinetd restart`
+
+## Verification Steps
+
+  1. Install and configure chargen
+  2. Start msfconsole
+  3. Do: `use auxiliary/scanner/chargen/chargen_probe`
+  4. Do: `run`
+
+## Scenarios
+
+  A run against the configuration from these docs
+
+  ```
+    msf > use auxiliary/scanner/chargen/chargen_probe
+    msf auxiliary(chargen_probe) > set rhosts 127.0.0.1
+    rhosts => 127.0.0.1
+    msf auxiliary(chargen_probe) > set verbose true
+    verbose => true
+    msf auxiliary(chargen_probe) > run
+    
+    [*] 127.0.0.1:19 - Response: !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefgh
+    "#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghi
+    #$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghij
+    $%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijk
+    %&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijkl
+    &'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklm
+    '()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmn
+    ()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmno
+    )*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnop
+    *+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopq
+    +,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqr
+    ,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrs
+    -./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrst
+    ./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghi
+    
+    [+] 127.0.0.1:19 answers with 1022 bytes (headers + UDP payload)
+    [*] Scanned 1 of 1 hosts (100% complete)
+    [*] Auxiliary module execution completed
+  ```