DSS TFTP 1.0 Path Traversal

Type packetstorm
Reporter lucyoa
Modified 2015-02-27T00:00:00


                                            `Document Title:  
DSS TFTP 1.0 Server - Path Traversal Vulnerability  
References (Source):  
Release Date:  
Vulnerability Laboratory ID (VL-ID):  
Common Vulnerability Scoring System:  
Product & Service Introduction:  
DSS TFTP 1.0 Server is a simple TFTP server that allows basic file transfers.  
(Download: http://www.kndata.com/downloads/ )  
Abstract Advisory Information:  
An independent vulnerability laboratory researcher discovered a path traversal vulnerability in the official DSS TFTP 1.0 Server software.  
Vulnerability Disclosure Timeline:  
2015-02-26: Public Disclosure (Vulnerability Laboratory)  
Discovery Status:  
Exploitation Technique:  
Severity Level:  
Technical Details & Description:  
DSS TFTP 1.0 Server is a simple TFTP server that allows user to download/upload files through the TFTP service from/to specified tftp root directory.   
However, application is vulnerable to path traversal that enables attacker to download/upload files outside the tftp root directory.  
Proof of Concept (PoC):  
The vulnerability can be exploited by remote attackers without user interaction or privileged application user account.  
For security demonstration or to reproduce the security vulnerability follow the provided information and steps below to continue.  
GET file from server  
tftp -i GET .../boot.ini  
PUT file outside the tftp root directory  
tftp -i PUT exploit.exe .../exploit.exe  
Security Risk:  
The security risk of the path traversal software vulnerability is estimated as high. (CVSS 6.2)  
Credits & Authors:  
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