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Home arrow SecurityAlert Database

Arrow  Topic :

NULL pointer in SurgeFTP 2.3a2


Arrow  SecurityAlert : 3704
Arrow  CVE : CVE-2008-1052
Arrow  SecurityRisk : Medium  Security Risk Medium  (About)
Arrow  Remote Exploit : Yes
Arrow  Local Exploit : No
Arrow  Exploit Available : Yes
Arrow  Credit : Luigi Auriemma
Arrow  Published : 27.02.2008

Arrow  Affected Software : SurgeFTP 2.3a2



Arrow  Advisory Content :  

#######################################################################

Luigi Auriemma

Application: SurgeFTP
http://www.netwinsite.com/surgeftp/
Versions: <= 2.3a2
Platforms: Windows, Linux and Solaris
Bug: NULL pointer access
Exploitation: remote
Date: 25 Feb 2008
Author: Luigi Auriemma
e-mail: aluigi (at) autistici (dot) org [email concealed]
web: aluigi.org

#######################################################################

1) Introduction
2) Bug
3) The Code
4) Fix

#######################################################################

===============
1) Introduction
===============

SurgeFTP is a commercial FTP server which supports also SSL/TLS and has
a web interface for remote administration.

#######################################################################

======
2) Bug
======

When a Content-Length parameter is received from the client, SurgeFTP
tries to allocate the amount of memory (max 2147483647 bytes) specified
in this field and then copies the data in the resulted new buffer.
The problem is in the lack of checks on the result of the allocation
which leads to the crash of the entire server during the copying of the
data to a NULL pointer if that amount of memory cannot be allocated.

#######################################################################

===========
3) The Code
===========

http://aluigi.org/poc/surgeftpizza.txt

nc SERVER 7021 -v -v < surgeftpizza.txt

#######################################################################

======
4) Fix
======

No fix

#######################################################################

---
Luigi Auriemma
http://aluigi.org






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