module

Apache mod_cgi Bash Environment Variable Injection (Shellshock) Scanner

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Disclosed
2014-09-24
Created
2018-05-30

Description

This module scans for the Shellshock vulnerability, a flaw in how the Bash shell
handles external environment variables. This module targets CGI scripts in the
Apache web server by setting the HTTP_USER_AGENT environment variable to a
malicious function definition.

PROTIP: Use exploit/multi/handler with a PAYLOAD appropriate to your
CMD, set ExitOnSession false, run -j, and then run this module to create
sessions on vulnerable hosts.

Note that this is not the recommended method for obtaining shells.
If you require sessions, please use the apache_mod_cgi_bash_env_exec
exploit module instead.

Authors

Stephane Chazelas
wvu wvu@metasploit.com
lcamtuf

References

Module Options

To display the available options, load the module within the Metasploit console and run the commands ‘show options’ or ‘show advanced’:


    msf > use auxiliary/scanner/http/apache_mod_cgi_bash_env
    msf auxiliary(apache_mod_cgi_bash_env) > show actions
        ...actions...
    msf auxiliary(apache_mod_cgi_bash_env) > set ACTION < action-name >
    msf auxiliary(apache_mod_cgi_bash_env) > show options
        ...show and set options...
    msf auxiliary(apache_mod_cgi_bash_env) > run
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