FancyFon FAMOC 3.16.5 Missing Salt

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Advisory ID: SYSS-2014-013  
Product(s): FAMOC  
Vendor: FancyFon  
Affected Version(s): 3.16.5   
Tested Version(s): 3.16.5  
Vulnerability Type: Use of a One-Way Hash without a Salt (CWE-759)  
Risk Level: Low  
Solution Status: Fixed  
Vendor Notification: 2014-12-19  
Solution Date: 2015-01-23  
Public Disclosure: 2015-01-23  
CVE Reference: Not yet assigned  
Author of Advisory: Matthias Deeg (SySS GmbH)  
  
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Overview:  
  
FAMOC is a mobile device management software by FancyFon supporting  
different kinds of mobile devices.  
  
The vendor FancyFon describes the product as follows (see [1]):  
  
"FAMOC is a flexible and open mobile device lifecycle management   
solution, enabling any number of smartphones using a variety of   
operating systems, to be centrally and remotely managed, over the   
Internet."  
  
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Vulnerability Details:  
  
The SySS GmbH found out that user passwords are stored as raw, unsalted  
MD5 hash values in the table tb_user of the database of the FAMOC mobile   
device management software.  
  
The use of a cryptographic one-way hash function MD5 without using a   
salt for storing sensitive data like user passwords allows an attacker  
with access to this data to perform efficient password guessing attacks  
using pre-computed dictionaries, for instance rainbow tables.  
  
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Proof of Concept (PoC):  
  
By having access to the database of the FAMOC mobile device management   
software, for example by exploiting an SQL injection vulnerability, an   
attacker can extract hashed user passwords from the table tb_user, as  
the following sqlmap output illustrates:  
  
sql-shell> select pass from tb_user where login='syss'  
[10:25:57] [INFO] fetching SQL SELECT statement query output: 'select pass from tb_user where login='syss''  
[10:25:57] [INFO] retrieved: 1  
[10:26:01] [INFO] retrieving the length of query output  
[10:26:01] [INFO] retrieved: 32  
[10:26:50] [INFO] retrieved: 3c7bdf8ab364c1ef5c951d1cc5d7239d   
select pass from tb_user where login='syss' [1]:  
[*] 3c7bdf8ab364c1ef5c951d1cc5d7239d  
  
  
The stored user passwords are raw MD5 hashes, as the following output  
for the sample password "syss" shows:  
  
$ echo -n "syss" | md5sum  
3c7bdf8ab364c1ef5c951d1cc5d7239d -  
  
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Solution:  
  
Update to FAMOC software version 3.17.4.  
  
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Disclosure Timeline:  
  
2014-12-19: Vulnerability reported to vendor  
2014-12-19: Vendor acknowledges e-mail with SySS security advisory  
2015-01-16: Contacted vendor for status information about the reported  
vulnerability  
2015-01-23: Vendor responds that this security vulnerability was   
addressed in the FAMOC software version 3.17.4.  
Public release of security advisory  
  
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References:  
  
[1] Product Web Site for FAMOC Mobile Device Management  
http://www.fancyfon.com/  
  
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Credits:  
  
This security vulnerability was found by Matthias Deeg of the SySS GmbH.  
  
E-Mail: matthias.deeg (at) syss.de  
Public Key: https://www.syss.de/fileadmin/dokumente/Materialien/PGPKeys/Matthias_Deeg.asc  
Key fingerprint = 5AE3 96EE A014 FB90 9D81 AF90 8C54 7E88 A34C CED8  
  
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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.  
  
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Copyright:  
  
Creative Commons - Attribution (by) - Version 3.0  
URL: http://creativecommons.org/licenses/by/3.0/deed.en  
  
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