Xlight FTP Server PASS Command Remote Buffer Overflow Vulnerability

Bugtraq ID:	9285
Class:	Boundary Condition Error
CVE:
Remote:	Yes
Local:	No
Published:	Dec 23 2003 12:00AM
Updated:	Dec 23 2003 12:00AM
Credit:	The disclosure of this issue has been credited to STORM of SecurITeam.
Vulnerable:	XLight FTP Server XLight FTP Server 1.41 XLight FTP Server XLight FTP Server 1.25
Not Vulnerable:	XLight FTP Server XLight FTP Server 1.45

Xlight FTP Server PASS Command Remote Buffer Overflow Vulnerability

It has been reported that Xlight FTP Server is prone to a remote buffer overflow condition that may allow an attacker to gain unauthorized access to a system running the vulnerable software. The issue presents itself when an attacker sends a specially crafted PASS command request containing an excessively long string value to the vulnerable server.

Xlight FTP Server versions 1.41 and prior have been reported to be prone to this issue.

Xlight FTP Server PASS Command Remote Buffer Overflow Vulnerability

The following proof of concept has been provided:

• /data/vulnerabilities/exploits/xlight_poc.pl

Xlight FTP Server PASS Command Remote Buffer Overflow Vulnerability

Solution:
The vendor has released Xlight FTP Server version 1.45 to address this issue.


XLight FTP Server XLight FTP Server 1.25

• XLight FTP Server Xlight ftp server 1.45
  http://www.xlightftpd.com/download/setup.exe

XLight FTP Server XLight FTP Server 1.41

• XLight FTP Server Xlight ftp server 1.45
  http://www.xlightftpd.com/download/setup.exe

Xlight FTP Server PASS Command Remote Buffer Overflow Vulnerability

References:

• Product Homepage (XLight FTP Server)
  
• Xlight FTP Server Buffer Overflow in PASS Command (SecurityTracker)