REWTERZ-20060504 - Sami FTP Server Remote Buffer Overflow Vulnerability
May 4, 2006
High (Remote Code Execution)
Sami FTP Server v2.0.2 and before
Operating Systems Affected:
Windows NT 4.0
Windows 98 / ME
rewterz has discovered a critical vulnerability in Sami FTP Server. This vulnerability may allow a remote attacker to overwrite memory with user controlled data and execute arbitrary code in the context of the user who executed the Sami FTP Server.
This vulnerability exists in the handling of both username and password input provided by the user while making connection to FTP server. We chose not to provide detailed information about the location of the vulnerability and how to reproduce it because the author hasn't confirmed this vulnerability. We can pass a long argument with some commands into a buffer. There is no checking of the length of these inputs. Depending on the input, this will cause exploitable condition.
We have confirmed the ability to execute our own code. This is a common buffer overflow vulnerability and can be exploited easily.
Discovery: Muhammad Ahmed Siddiqui
Copyright (c) 2003-2006 rewterz
Permission is hereby granted for the redistribution of this alert electronically. It is not to be edited in any way without express consent of rewterz.
The information within this paper may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are no warranties, implied or express, with regard to this information. In no event shall the author be liable for any direct or indirect damages whatsoever arising out of or in connection with the use or spread of this information. Any use of this information is at the user's own risk.