[guru] IBM biztonsagi frissitesek
DATE: Thu, 10 Sep 2009 22:24:16 +0200
Az Autonomy KeyView SDK excel állományok feldolgozásakor heap buffer overflow
hibát tartalmaz. Ez egy külső rutinkönyvtár, amit a Lotus Notes és a Symantec
is használ a termékeiben.
A Lotus Notes által használt RSS megjelenítő widget az IE-t használja a
tényleges megjelenítésre, azonban ez a forrástól függetlenül mindíg a
sajátgép zónában történik.
--- Begin Message ---
iDefense Security Advisory 08.25.09
http://labs.idefense.com/intelligence/vulnerabilities/
Aug 25, 2009
I. BACKGROUND
Autonomy KeyView SDK is a commercial SDK that provides many file format
parsing libraries. It supports a large number of different document
formats, one of which is the Microsoft Excel 97 (XLS) format. It is
used by several popular vendors for processing documents. For more
information, visit the URL referenced below.
http://www.autonomy.com/
KeyView is used by many commercial products to handle various types of
file formats. Lotus Notes and Symantec Mail Security are two examples
of such products.
II. DESCRIPTION
Remote exploitation of an integer overflow vulnerability in Autonomy's
KeyView SDK allows attackers to execute arbitrary code with the
privileges of the targeted application.
The vulnerability occurs when parsing a Shared String Table (SST) record
inside of an Excel file. This record is used to hold a table of strings
that are used inside of the document. One of the fields in this record
is a 32-bit integer that represents the number of strings in the table.
This value is used in a calculation that controls the number of bytes to
allocate for a dynamic heap buffer. The value is not properly sanitized,
which leads to an integer overflow in the calculation. This results in a
heap based buffer overflow vulnerability.
III. ANALYSIS
Exploitation allows attackers to execute arbitrary code with the
privileges of the targeted application. In order to exploit this
vulnerability, an attacker must cause a specially crafted Microsoft
Excel Spreadsheet to be processed by an application using the Autonomy
KeyView SDK.
When targeting applications like Lotus Notes, this requires that an
attacker convince a user to view an e-mail attachment; however, in
other cases, processing may take place automatically as a document is
examined. The specific circumstances will depend on the application
being targeted.
The privileges that an attacker gains may be different for each
application that uses the KeyView SDK. For example, exploiting this
issue via Lotus Notes yields the current user's privileges while
exploiting the vulnerability via Symantec Mail Security yields SYSTEM
privileges.
IV. DETECTION
iDefense confirmed the existence of this vulnerability using the
following versions of the affected software:
xlssr.dll version 8.0.0.7214, distributed with IBM Lotus Notes 8.0
xlssr.dll version 8.5.0.8339, distributed with IBM Lotus Notes 8.5
xlssr.dll version 10.5.0.0, distributed with Symantec Mail Security
for Microsoft Exchange
All versions of the KeyView SDK that include the "xlssr.dll" filter
module are suspected to be vulnerable.
V. WORKAROUND
For all products using the KeyView SDK, you can disable the "xlssr.dll"
filter by doing one of the following:
Removing the xlssr.dll filter module from the affected system(s).
Delete or comment out the line referencing "xlssr.dll" from the
"KeyView.ini" file distributed with the affected application.
Additionally, for Symantec Mail Security, disabling "content filtering"
will prevent exploitation.
VI. VENDOR RESPONSE
IBM has released a patch which addresses this issue in Lotus Notes. For
more information, consult their advisory at the following URL:
http://www-01.ibm.com/support/docview.wss?rs=463&uid=swg21396492
Symantec has released a patch which addresses this issue in several
Symantec products. For more information, consult their advisory at the
following URL:
http://www.symantec.com/business/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=2009&suid=20090825_00
VII. CVE INFORMATION
A Mitre Corp. Common Vulnerabilities and Exposures (CVE) number has not
been assigned yet.
VIII. DISCLOSURE TIMELINE
05/05/2009 - Initial Contact
05/05/2009 - Autonomy first response
05/05/2009 - Symantec first response
05/05/2009 - IBM first response
05/05/2009 - Autonomy POC request
05/05/2009 - IBM POC request
05/06/2009 - Autonomy clarification request
05/06/2009 - Symantec clarification request
05/06/2009 - Request public key from Autonomy
05/06/2009 - Sent POC to IBM, Symantec
05/06/2009 - Symantec requests resend
05/06/2009 - Resent POC to Symantec
05/06/2009 - Autonomy sends public key
05/06/2009 - Sent POC to Autonomy
05/07/2009 - Symantec holding on Autonomy fix
05/07/2009 - Autonomy requested clarification
05/07/2009 - Sent clarification.
08/11/2009 - Disclosure coordination
08/17/2009 - Disclosure re-coordination
08/25/2009 - Coordinated Public Disclosure
IX. CREDIT
This vulnerability was discovered by Joshua J. Drake of iDefense Labs.
Get paid for vulnerability research
http://labs.idefense.com/methodology/vulnerability/vcp.php
Free tools, research and upcoming events
http://labs.idefense.com/
X. LEGAL NOTICES
Copyright © 2009 iDefense, Inc.
Permission is granted for the redistribution of this alert
electronically. It may not be edited in any way without the express
written consent of iDefense. If you wish to reprint the whole or any
part of this alert in any other medium other than electronically,
please e-mail customerservice@idefense.com for permission.
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.
--- End Message ---
--- Begin Message ---
IBM Lotus Notes 8.5 RSS Widget Privilege Escalation
scip AG Vulnerability ID 4021 (09/08/2009)
http://www.scip.ch/?vuldb.4021
I. INTRODUCTION
Lotus Notes is a client-server, collaborative application developed and
sold by IBM Software Group.
More information is available on the official product web site at the
following URL:
http://www.ibm.com/software/lotus/products/notes/
II. DESCRIPTION
Marc Ruef at scip AG found a design vulnerability in the current Release
8.5.
The product provides some widgets which can be added and enabled by the
user. One of those widgets provide a simple RSS reader.
This reader downloads the RSS file, extracts the items and saves them
locally as HTML files.
The interpretation and display of the RSS items is handled by the
Internet Explorer regarding the applied security zone.
III. EXPLOITATION
No exploitation is required. A malicious RSS feed may contain script
data or embedded objects.
IV. IMPACT
The RSS items are handled like web documents which introduces the
possibility of running script code or to embed multimedia objects (e.g.
Flash or movies).
Because locally saved files run in the Local Zone of the Internet
Explorer some privilege escalation is possible.
V. DETECTION
It may be possible to identify malicious RSS feeds if they contain
script code or embedded objects.
VI. SOLUTION
IBM has been informed immediately. They are able to address this
vulnerability with a hotfix.
VII. VENDOR RESPONSE
The vendor verified the existence of the issue and addressed it as soon
as possible with a hotfix. Unfortunately most of the communication
bypassed us and were forced to ask for the current status several times.
Our last request of the current status at 08/24/2009 were unanswered.
VIII. SOURCES
scip AG - Security Consulting Information Process (german)
http://www.scip.ch/
scip AG - Vulnerability Database (german)
http://www.scip.ch/?vuldb.4021
computec.ch Document Database (german)
http://www.computec.ch/download.php
IX. DISCLOSURE TIMELINE
2009/04/07 Identification of the vulnerability.
2009/04/23 Notification of IBM via the customer.
2009/04/23 Technical knowhow exchange between scip AG/IBM.
2009/06/05 Asking for current status by scip AG. (no answer)
2009/07/09 Asking for current status by scip AG.
2009/07/09 Reply with current status and assigned PMR.
2009/08/24 Asking for current status by scip AG. (no answer)
2009/09/08 Public disclosure of the advisory.
X. CREDITS
The vulnerabilities were discovered by Marc Ruef.
Marc Ruef, scip AG, Zuerich, Switzerland
maru-at-scip.ch
http://www.scip.ch
A1. LEGAL NOTICES
Copyright (c) 2002-2009 scip AG, Switzerland.
Permission is granted for the re-distribution of this alert. It may not
be edited in any way without permission of scip AG.
The information in the advisory is believed to be accurate at the time
of publishing based on currently available information. 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 from use of or reliance on this advisory.
--- End Message ---