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Hash: SHA1
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|| [ISR]
|| Infobyte Security Research
|| www.infobyte.com.ar
|| 07.02.2008
||
.:: SUMMARY
Novell GroupWise Messenger Client (GWIM) Remote Stack Overflow
Version: 2.0, It is suspected that all previous versions of Groupwise
Messenger Client are vulnerable.
.:: BACKGROUND
Novell GroupWise Messenger is a corporate instant messaging product that uses
Novell eDirectory? as its user database
More info: http://www.novell.com
.:: VULNERABILITY VIDEO DEMO
http://www.infobyte.com.ar/demo/ISR_groupwise_messenger.html
.:: POC
ISR-groupwisemsn.pl, simple fake groupwise msn server.
http://www.infobyte.com.ar/developments.html
.:: DESCRIPTION
Issue 1:
- -------
This issue is due to a failure of the application to securely parse the
server's response.
The application server works similarly to HTTP protocol, default tcp port
8300.
The server always response the client's request with something like this:
"
HTTP/1.0 200 \r
Date: xxx, xx xxx xxxx xx:xx:xx GMT\r
Pragma: no-cache\r
Cache-Control: no-cache\r
\r
%VALUES%
\0\0\0
\0\24\0\0\0NM_A_SZ_RESULT_CODE\0\2\0\0\x000\0
\0\27\0\0\0NM_A_SZ_TRANSACTION_ID\0\2\0\0\x001\0\0
"
If the client application receive a server response to any request like the
following, a stack overflow is occurred:
"
HTTP/1.0 200 \r
Date: xxx, xx xxx xxxx xx:xx:xx GMT\r
Pragma: no-cache\r
Cache-Control: no-cache\r
\r
%VALUES%
\0\0\0
\0\24\0\0\0NM_A_SZ_RESULT_CODE\0\2\0\0\x000\0
\0\27\0\0\0NM_A_SZ_TRANSACTION_ID\0\2\0\0\x001\0\0"+ "AAAAAAAAAA...." x 5000
Issue 2:
- ------
We found another stack overflow regarding the client's popup alerts,
when you receive a message of another user the server send a string like
this to the client:
"l\0\0\x001\0\0\0CN=XXXX,OU=XX,OU=XXXX,OU=XX,OU=XX,O=INFOBYTEXX\0'\0\0\0[87
1F8247-4B110000-0A01C80A-6C20-010
0]\0\1\0\0\0\xE4\0\0\0{\\rtf1\\fbidis\\ansi\\ansicpg1252\\deff0\\deflang308
2{\\fonttbl{\\f0\\fswiss\\fprq2\\fcharset0
fontname;}}\r\n{\\colortbl;\\red0\\green0\\blue0;}\r\n\\viewkind4\\uc1\\par
d\\ltrpar\\li50\\ri50\\cf1\\f0\\fs20 MESSAGE\\par\r\n}\r\n\0";
If a client receive a string like this but in any place of the string it's
added an "A" x 5000 you have another stack overflow.
.:: IMPACT
Both vulnerabilities permit arbitrary code execution.
.:: VENDOR RESPONSE
Vendor advisory:
http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5026700.html
.:: CVE INFORMATION
Id: CVE-2008-2703, CVE-2008-2704
Web: http://cve.mitre.org
.:: DISCLOSURE TIMELINE
01/12/2008 Initial vendor notification
01/13/2007 Initial vendor response notify research
06/10/2007 Coordinated public disclosure
.:: CREDIT
Francisco Amato is credited with discovering this vulnerability.
famato][at][infobyte][dot][com][dot][ar
.:: LEGAL NOTICES
Copyright (c) 2007 by [ISR] Infobyte Security Research.
Permission to redistribute this alert electronically is granted as long as it
is not
edited in any way unless authorized by Infobyte Security Research Response.
Reprinting the whole or part of this alert in any medium other than
electronically
requires permission from infobyte com ar
Disclaimer
The information in the advisory is believed to be accurate at the time of
publishing
based on currently available information. Use of the information constitutes
acceptance
for use in an AS IS condition. There are no warranties with regard to this
information.
Neither the author nor the publisher accepts any liability for any direct,
indirect, or
consequential loss or damage arising from use of, or reliance on, this
information.
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Received on Jul 02 2008
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