Rather than literally returning the default Regex object, override the accessor
to return the string representation. This allows the RPC backend to properly
serialize the options hash values, since msgpack does not know how to serialize
a Regexp object. Fixes#3798.
To verify the fix, run the steps for issue #3798 and ensure that the module
options are returned instead of a backtrace. Also, ensure that the module
continues to work as expected:
```
$ ./msfconsole -q
msf > use auxiliary/scanner/http/scraper
msf auxiliary(scraper) > info
Name: HTTP Page Scraper
Module: auxiliary/scanner/http/scraper
License: Metasploit Framework License (BSD)
Rank: Normal
Provided by:
et <et@metasploit.com>
Basic options:
Name Current Setting Required Description
---- --------------- -------- -----------
PATH / yes The test path to the page to analize
PATTERN (?i-mx:<title>(.*)<\/title>) yes The regex to use (default regex is a sample to grab page title)
Proxies no Use a proxy chain
RHOSTS yes The target address range or CIDR identifier
RPORT 80 yes The target port
THREADS 1 yes The number of concurrent threads
VHOST no HTTP server virtual host
override default attr for OptRegexp
Description:
Scrap defined data from a specific web page based on a regular
expresion
msf auxiliary(scraper) > set RHOSTS lwn.net
RHOSTS => lwn.net
msf auxiliary(scraper) > set RHOSTS 72.51.34.34
RHOSTS => 72.51.34.34
msf auxiliary(scraper) > set VHOST lwn.net
VHOST => lwn.net
msf auxiliary(scraper) > run
[*] [72.51.34.34] / [Welcome to LWN.net [LWN.net]]
[*] Scanned 1 of 1 hosts (100% complete)
[*] Auxiliary module execution completed
```
Borja Merino
jvazquez-r7
Jon Hart
Gabor Seljan
William Vu
Brent Cook
Mark Judice
Joe Vennix
Meatballs
Brendan Coles
sinn3r