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Published on April 2nd, 2016 📆 | 5855 Views ⚑


Shocker — A Tool To Find And Exploit Servers Vulnerable To Shellshock

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Shocker: A Tool To Find And Exploit Servers Vulnerable To Shellshock

A tool to find and exploit servers vulnerable to Shellshock.


  • -h, --help show this help message and exit
  • --Host HOST, -H HOST A target hostname or IP address
  • --file FILE, -f FILE File containing a list of targets
  • --port PORT, -p PORT The target port number (default=80)
  • --exploit EXPLOIT, -e EXPLOIT Command to execute (default=/bin/uname -a)
  • --cgi CGI, -c CGI Single CGI to check (e.g. /cgi-bin/test.cgi)
  • --proxy PROXY A BIT BROKEN RIGHT NOW Proxy to be used in the form 'ip:port'
  • --ssl, -s Use SSL (default=False)
  • --threads THREADS, -t THREADS Maximum number of threads (default=10, max=100)
  • --verbose, -v Be verbose in output

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Usage Examples

./ -H -e "/bin/cat /etc/passwd" -c /cgi-bin/test.cgi

Scans for and, if found, attempts to cat /etc/passwd

./ -H -p 8001 -s

Scan on port 8001 using SSL for all scripts in cgi_list and attempts the default exploit for any found

./ -f ./hostlist

Scans all hosts listed in the file ./hostlist with the default options


Python 2.7+

Change Log

Changes in version 1.0 (March 2016)

  • Some additional scripts contributed and updates to some comments, URLs and contact details

Changes in version 0.72 (December 2014)

  • Minor corrections to logic and typos

Changes in version 0.71 (December 2014)

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  • Added timeout to urllib2.urlopen requests using a global 'TIMEOUT'

Changes in version 0.7 (November 2014)

  • Add interactive 'psuedo console' for further exploitation of a chosen vulnerable server
  • Attemped to clean up output buffering issues by wrapping sys.stdout in a class which flushes on every call to write
  • Added a progress indicator for use in time consuming tasks to reassure non vebose users

Changes in version 0.6 (October 2014)

  • Preventing return codes other than 200 from being considered successes
  • Added ability to specify multiple targets in a file
  • Moved the 'cgi_list' list of scripts to attempt to exploit to a file
  • Fixed some output formatting issues
  • Fixed valid hostname/IP regex to allow single word hostnames

Changes in version 0.5 (October 2014)

  • Added ability to specify a single script to target rather than using cgi_list
  • Introduced a timeout on socket operations for host_check
  • Added some usage examples in the script header
  • Added an epilogue to the help text indicating presence of examples

Changes in version 0.4 (October 2014)

  • Introduced a thread count limit defaulting to 10
  • Removed colour support until I can figure out how to make it work in Windows and *nix equally well
  • Spelling corrections
  • More comprehensive cgi_list
  • Removes success_flag from output


  • Identify and respond correctly to HTTP/200 response - false positives - Low priority/hassle
  • Implement curses for *nix systems - For the whole application or only psuedo terminal? - Low priority/prettiness
  • Thread the initial host check now that multiple targets are supported (and could be make this bit time consuming)
  • Change verbose to integer value - quiet, normal, verbose, debug?
  • Add option to skip initial host checks for the sake of speed?
  • Add a summary of results before exiting
  • Save results to a file? Format?
  • Eventually the idea is to include multiple possible vectors but currently only one is checked.
  • Add Windows and *nix colour support - Low priority/prettiness
  • Add a timeout in interactive mode for commands which don't return, e.g. /bin/cat /dev/zero
  • Prettify - Low priority/pretinness (obviously)
  • Add support for scanning and explointing SSH and SMTP?
  • Add SOCKS proxy support, potentially using from Rober Picard

Developed By:

Tom Watson, tom [dot] watson [at] nccgroup [dot] trust


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