[转载]Discuz x3.2前台GET型SQL注入裂痕

2020-07-03 13:09:57

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这篇文章主要为大家详细介绍了[转载]Discuz x3.2前台GET型SQL注入裂痕，具有一定的参考价值，感兴趣的小伙伴们可以参考一下,有需要的朋友可以收藏方便以后借鉴。

前台非盲注，只需要共同一个xss，就能消除鸡肋了。
信pandas，得长生，紧抱doggy哥大腿！

/source/include/misc/misc_stat.php 46行：
if(!empty($_GET['xml'])) {
$xaxis = '';
$graph = array();
$count = 1;
$begin = dgmdate($beginunixstr, 'Ymd');
$end = dgmdate($endunixstr, 'Ymd');
$field = '*';
if(!empty($_GET['merge'])) {
if(empty($_GET['types'])) {
$_GET['types'] = array_merge($cols['login'], $cols['forum'], $cols['tgroup'], $cols['home'], $cols['space']);
}
$field = 'daytime,`'.implode('`+`', $_GET['types']).'` AS statistic';
$type = 'statistic';
}
foreach(C::t('common_stat')->fetch_all($begin, $end, $field) as $value) {
$xaxis .= "<value xid='$count'>".substr($value['daytime'], 4, 4)."</value>";
if($type == 'all') {
foreach ($cols as $ck => $cvs) {
if($ck == 'login') {
$graph['login'] .= "<value xid='$count'>$value[login]</value>";
$graph['register'] .= "<value xid='$count'>$value[register]</value>";
} else {
$num = 0;
foreach ($cvs as $cvk) {
$num = $value[$cvk] + $num;
}
$graph[$ck] .= "<value xid='$count'>".$num."</value>";
}
}
} else {
//var_dump($value);exit;
if(empty($_GET['types']) || !empty($_GET['merge'])) {
$graph[$type] .= "<value xid='$count'>".$value[$type]."</value>";
} else {
foreach($_GET['types'] as $t) {
$graph[$t] .= "<value xid='$count'>".$value[$t]."</value>";
}
}
}
$count++;
}
$xml = '';
$xml .= '<'."?xml version="1.0" encoding="utf-8"?>";
$xml .= '<chart><xaxis>';
$xml .= $xaxis;
$xml .= "</xaxis><graphs>";
$count = 0;
foreach ($graph as $key => $value) {
$xml .= "<graph gid='$count' title='".diconv(lang('spacecp', "do_stat_$key"), CHARSET, 'utf8')."'>";
$xml .= $value;
$xml .= '</graph>';
$count++;
}
$xml .= '</graphs></chart>';

@header("Expires: -1");
@header("Cache-Control: no-store, private, post-check=0, pre-check=0, max-age=0", FALSE);
@header("Pragma: no-cache");
@header("Content-type: application/xml; charset=utf-8");
echo $xml;
exit();
}

见这一句：$field = 'daytime,`'.implode('`+`', $_GET['types']).'` AS statistic';

将$_GET['type']数组直接用`+`支解，并没有过滤。

因为位置在$field的处所，并不在单引号中，所以不消引入单引号，也无需思量addslashes。

此刻碰着另一个问题，怎么绕过discuz3.2的WAF？

不绕过也没法出数据。

我们先看看输出点在那里：http://localhost/bbs/misc.php?mod=stat&op=trend&xml=1&merge=1&types[1]=x