Miniserv Perl Format String Exploit

This module exploits the following vulnerability, as described by the CVE database: "Format string vulnerability in miniserv.pl Perl web server in Webmin before 1.250 and Usermin before 1.180, with syslog logging enabled, allows remote attackers to [...] execute arbitrary code via format string specifiers in the username parameter to the login form, which is ultimately used in a syslog call." The most common TCP ports used by vulnerable programs are 10000 for Webmin and 20000 for Usermin. This module will run 2 different phases: the first phase will bruteforce a return address location (retloc) and the second phase will bruteforce the address of the agent code (retaddr). NOTE: The first phase might create zombie processes that should be killed once the agent has been installed. The second phase might generate a few megabytes of traffic.