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GLPI v0.83.8 Multiple Error-based SQL Injection Vulnerabilities

Medium

Advisory ID

ZSL-2013-5146

Release Date

19 June 2013

Vendor

INDEPNET Development Team - http://www.glpi-project.org

Affected Version

0.83.7 and 0.83.8

CVE

CVE-2013-2226

Tested On

Microsoft Windows 7 Ultimate SP1 (EN) - Apache/2.4.3, PHP/5.4.7, Linux CentOS 6.0 (Final) - Apache/2.2.15, PHP/5.3.3

Summary

GLPI, an initialism for Gestionnaire libre de parc informatique (Free Management of Computer Equipment), was designed by Indepnet Association (a non profit organisation) in 2003. GLPI is a free asset and IT management software package, it also offers functionalities like servicedesk ITIL or license tracking and software auditing.

Description

Input passed via the POST parameter 'users_id_assign' in '/ajax/ticketassigninformation.php' script, POST parameter 'filename' in '/front/document.form.php' script, and POST parameter 'table' in '/ajax/comments.php' script is not properly sanitised before being used in SQL queries. This can be exploited by a malicious attacker to manipulate SQL queries by injecting arbitrary SQL code in the affected application.

/inc/db.function.php:
---------------------

274: function countElementsInTable($table, $condition="") {
275: global $DB;
276:
277: if (is_array($table)) {
278: $table = implode('`,`',$table);
279: }
280:
281: $query = "SELECT COUNT(*) AS cpt
282: FROM `$table`";
283:
284: if (!empty($condition)) {
285: $query .= " WHERE $condition ";
286: }
287:
288: $result =$DB->query($query);
289: $ligne  = $DB->fetch_array($result);
290: return $ligne['cpt'];
291: }

----------------------------------------------------------------------

*** MySQL query error :
***
SQL: SELECT COUNT(*) AS cpt
FROM `glpi_tickets`,`glpi_tickets_users` WHERE `glpi_tickets_users`.`tickets_id` = `glpi_tickets`.`id`
AND `glpi_tickets_users`.`users_id` = \'2\'\'
AND `glpi_tickets_users`.`type` = \'2\'
AND `glpi_tickets`.`is_deleted` = 0
AND `glpi_tickets`.`status`
NOT IN (\'solved\', \'closed\')
Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '2'
AND `glpi_tickets`.`is_deleted` = 0
' at line 3
Backtrace :
/var/www/html/glpi/inc/db.function.php :288		DBmysql->query()
/var/www/html/glpi/inc/commonitilobject.class.php :362		countElementsInTable()
/var/www/html/glpi/ajax/ticketassigninformation.php :66		CommonITILObject->countActiveObjectsForTech()
/var/www/html/glpi/ajax/ticketassigninformation.php

======================================================================
/inc/document.class.php:
------------------------

1221: static function isValidDoc($filename) {
1222: global $DB;
1223:
1224: $splitter = explode(".",$filename);
1225: $ext      = end($splitter);
1226:
1227: $query="SELECT *
1228: FROM `glpi_documenttypes`
1229: WHERE `ext` LIKE '$ext'
1230: AND `is_uploadable`='1'";
1231:
1232: if ($result = $DB->query($query)) {
1233: if ($DB->numrows($result)>0) {
1234: return Toolbox::strtoupper($ext);
1235: }
1236: }
1237: return "";
1238: }

----------------------------------------------------------------------

*** MySQL query error :
***
SQL: SELECT *
FROM `glpi_documenttypes`
WHERE `ext` LIKE \'1\'\'
AND `is_uploadable`=\'1\'
Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '1'' at line 3
Backtrace :
/var/www/html/glpi/inc/document.class.php :1232		DBmysql->query()
/var/www/html/glpi/inc/document.class.php :1088		Document::isValidDoc()
/var/www/html/glpi/inc/document.class.php :275		Document::uploadDocument()
/var/www/html/glpi/inc/commondbtm.class.php :878		Document->prepareInputForUpdate()
/var/www/html/glpi/front/document.form.php :99		CommonDBTM->update()
/var/www/html/glpi/front/document.form.php

======================================================================
/inc/dbmysql.class.php:
-----------------------

364: function list_tables($table="glpi_%") {
365: return $this->query("SHOW TABLES LIKE '".$table."'");
366: }

----------------------------------------------------------------------

*** MySQL query error :
***
SQL: SHOW TABLES LIKE \'%glpi_users\'%\'
Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '%'' at line 1
Backtrace :
/var/www/html/glpi/glpi/inc/dbmysql.class.php :365		DBmysql->query()
/var/www/html/glpi/inc/db.function.php :1182		DBmysql->list_tables()
/var/www/html/glpi/ajax/comments.php :47		TableExists()
/var/www/html/glpi/ajax/comments.php

Proof of Concept

glpi_sqli.txtTXT

Disclosure Timeline

20.06.2013Vendor releases version 0.83.9 to address these issues.

Credits

Vulnerability discovered by Humberto Cabrera

References

[1]http://www.glpi-project.org/?article41⟨=en

[2]http://packetstormsecurity.com/files/122097

[3]http://cxsecurity.com/issue/WLB-2013060168

[4]http://www.1337day.com/exploit/20914

[5]http://secunia.com/advisories/53891/