lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [day] [month] [year] [list]
Message-ID: <BAY1-F48yZR4XAQU7mA00006eeb@hotmail.com>
From: hughmann at hotmail.com (Hugh Mann)
Subject: ALLO ALLO WS_FTP Server

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Advisory Name: ALLO ALLO WS_FTP Server
Impact       : Arbitrary code execution as SYSTEM
Discovered by: Hugh Mann hughmann@...mail.com
Tested progs : Ipswitch WS_FTP Server 4.0.2.EVAL
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Description
~~~~~~~~~~~
A user who can upload files, and also has a max number of files limit or max 
total file size limit, can read any memory address the WS_FTP Server can 
read. With the right address, the user can cause a buffer overflow and 
execute arbitrary code as SYSTEM.

Details
~~~~~~~
There's a vulnerability in the ALLO handler when it sends an error string to 
the client. Instead of pushing an ASCIIZ string, it pushes a 64-bit value 
equal to total size of all files in user's dir and any sub-dirs. This is a 
value we can easily control if we exploit the WS_FTP Server REST 
vulnerability. If we change this value to a string of size equal to ~256 
bytes, we can overwrite the return address and execute arbitrary code as 
SYSTEM.

Exploit
~~~~~~~
See the attached source code.

_________________________________________________________________
Get rid of annoying pop-up ads with the new MSN Toolbar – FREE! 
http://clk.atdmt.com/AVE/go/onm00200414ave/direct/01/
-------------- next part --------------
A non-text attachment was scrubbed...
Name: xp_ws_ftp_server2.zip
Type: application/x-zip-compressed
Size: 8398 bytes
Desc: not available
Url : http://lists.grok.org.uk/pipermail/full-disclosure/attachments/20040323/8967eead/xp_ws_ftp_server2.bin

Powered by blists - more mailing lists