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CVE-2017-20104: Bugtraq: [SYSS-2017-001] Simplessus Files: SQL Injection

A vulnerability was found in Simplessus 3.7.7. It has been declared as critical. This vulnerability affects unknown code of the component Cookie Handler. The manipulation of the argument UWA_SID leads to sql injection (Time). The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 3.8.3 is able to address this issue. It is recommended to upgrade the affected component.

2 years ago

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From: adrian.vollmer () syss de
Date: Thu, 16 Feb 2017 08:27:55 GMT

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Advisory ID: SYSS-2017-001 Product: Simplessus Files Manufacturer: Simplessus Affected Version(s): 3.7.7 Tested Version(s): 3.7.7 Vulnerability Type: SQL Injection (CWE-89) Risk Level: High Solution Status: Open Manufacturer Notification: January 25, 2017 Solution Date: January 25, 2017 Public Disclosure: February 16, 2017 CVE Reference: Not yet assigned Author of Advisory: Dr. Adrian Vollmer, SySS GmbH


Product overview:

Simplessus Files is a file sharing web application.

The manufacturer describes the product as follows (see \[1\]):

    Simplessus Files is a simple software solution to exchange files and
    documents over the internet. No more file sharing via e-mail, FTP or
    CD-ROM with Simplessus Files replace very large files online easily.

Vulnerability overview:

Due to insufficient filtering of user controlled input, Simplessus Files is vulnerable to unauthenticated, time-based blind SQL injection.


Vulnerability Details:

During the login process, the web application passes the value of the cookie
'UWA\_SID' to a database without proper filtering or validation. Because SQL
statements are interpreted by the database, information can be extracted bit
by bit by using the SLEEP function.

Proof of Concept (PoC):

After sending the following request, the web application delays the response by 40 seconds (probably because the database is queried twice), showcasing the SQL injection vulnerability.

POST /?lang=de_de HTTP/1.1 Host: <HOSTNAME> Content-Length: 47 Cookie: UWA_SID=00000000000000000000000000’%2b(select*from(select(sleep(20)))a)%2b’

core%5Busername%5D=test&core%5Bpassword%5D=test


Solution:

Update to software version to 3.8.3.

Disclosure Timeline:

2017-01-13: Vulnerability discovered 2017-01-25: Vulnerability reported 2017-01-25: Vendor confirmation 2017-02-15: Public disclosure


References:

\[1\] Product website for Simplessus Files
    http://files.simplessus.com
\[2\] SySS Security Advisory SYSS-2017-001
    https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2017-001.txt
\[3\] SySS Responsible Disclosure Policy
    https://www.syss.de/en/news/responsible-disclosure-policy/

Credits:

This security vulnerability was found by Dr. Adrian Vollmer of SySS GmbH.

E-Mail: adrian.vollmer () syss de Public Key: https://www.syss.de/fileadmin/dokumente/PGPKeys/Adrian_Vollmer.asc Key ID: 0x037C9FE7 Key Fingerprint: 70CF E88C AEE7 DB0F 5DC8 3403 0E02 7C7E 037C 9FE7


Disclaimer:

The information provided in this security advisory is provided "as is" 
and without warranty of any kind. Details of this security advisory may
be updated in order to provide as accurate information as possible. The
latest version of this security advisory is available on the SySS Web
site.

Creative Commons - Attribution (by) - Version 3.0 URL: http://creativecommons.org/licenses/by/3.0/deed.en

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