schwerwiegende Sicherheitslücke in MS Excel + IE

Durch eine Sicherheitslücke ist es einem Angreifer möglich, auf einem fremden Rechner beliebige Programme auszuführen, wenn dort Excel installiert ist, und der Internet Explorer verwendet wird.

bugtraq Mailing Liste schrieb:
Peter Winter-Smith of NGSSoftware has discovered a high risk vulnerability
in Microsoft Excel which may allow an remote attacker to execute arbitrary
code on a user's system via the Internet Explorer Excel plugin.

This issue has been resolved in the Microsoft bulletin MS06-012, which may
be downloaded from:

NGSSoftware are going to withhold details of this flaw for three months.
Full details will be published on the 14th June 2006. This three month
window will allow users of Microsoft Excel the time needed to apply the
patch before the details are released to the general public. This reflects
NGSSoftware's approach to responsible disclosure.

NGSSoftware Insight Security Research
+44(0)208 401 0070
und wo wir gerade schon dabei sind... es geht gleich weiter...

Diesmal führt so ziemlich das gesamte Office Paket dazu, dass ein Angreifer über das Netz den Rechner kinderleicht übernehmen kann.

bugtraq Mailing List schrieb:
Hash: SHA1

Symantec Professional Services
Security Advisory

Advisory ID : SYMSA-2006-001
Advisory Name: Buffer overflow in Microsoft Office 2000, Office XP
(2002), and Office 2003 Routing Slip Metadata.
Release Date : 03-14-2006
Application : Microsoft Word, Microsoft Excel, Microsoft PowerPoint,
Microsoft Outlook
Platform : Windows
Severity : Remotely exploitable / User access
Author : Ollie Whitehouse /
Vendor Status: Duplicated and verified by Microsoft, patch available.
CVE Number : CVE-2006-0009
Reference :


There exists a buffer overflow in Microsoft Word, Excel,
PowerPoint, and Outlook in the parsing of the routing slip
metadata. The result is that when a user closes a malicious
document, arbitrary code can be executed on the host in


Microsoft Office supports the concept of routing slips. These
can be embedded within documents to ease the process of
collaborative working. During Symantec’s investigation it was
discovered that within the metadata of Microsoft’s document
format that there is both a length value and a null
terminated string for the different sections of a routing
slip. Upon further investigation it was discovered that the
affected applications allocate memory based on the size
contained within the length field, but then proceeds to copy
the entire string up until the null termination.

The result in the case of Microsoft Word 2002 SP3 (fully
patched), is that we overwrite the saved return address on
the stack with a Unicode value. This can be used to obtain
control of the execution within the program.

Microsoft Word, Excel, PowerPoint and Outlook all behave
slightly differently and in the case of Office 2003, it
appears that the values move from the stack to the heap
which makes exploitation more complicated, yet not impossible.

Vendor Response:

The above vulnerability was addressed by Microsoft Security
Bulletin MS06-012. For details see

If there are any further questions about this statement,
please contact Microsoft support.

Apply the patch supplied by Microsoft according to your
organization's software maintenance test and deployment

Common Vulnerabilities and Exposures (CVE) Information:

The Common Vulnerabilities and Exposures (CVE) project has
assigned the following names to these issues. These are
candidates for inclusion in the CVE list
(, which standardizes names for
security problems.


- -------Symantec Consulting Services Advisory Information-------

For questions about this advisory, or to report an error:

For details on Symantec's Vulnerability Reporting Policy:

Consulting Services Advisory Archive:

Consulting Services Advisory PGP Key:

- -------------Symantec Product Advisory Information-------------

To Report a Security Vulnerability in a Symantec Product:

For general information on Symantec's Product Vulnerability
reporting and response:

Symantec Product Advisory Archive:

Symantec Product Advisory PGP Key:

- ---------------------------------------------------------------

Copyright (c) 2006 by Symantec Corp.
Permission to redistribute this alert electronically is granted
as long as it is not edited in any way unless authorized by
Symantec Consulting Services. Reprinting the whole or part of
this alert in any medium other than electronically requires
permission from

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.

Symantec, Symantec products, and Symantec Consulting Services are
registered trademarks of Symantec Corp. and/or affiliated companies
in the United States and other countries. All other registered and
unregistered trademarks represented in this document are the sole
property of their respective companies/owners.

Version: PGP 8.1


Bemerkenswert finde ich allerdings schon, dass das Dateivolumen der Patches, welche notwendig sind, um wenigstens die offensichtlichsten Sicherheitslücken zu schliessen, inzwischen wesentlich grösser ist, als das Dateivolumen der Installationsdateien.
Wieso kann sich ausgerechnet Microsoft als einer der weltweit grössten Konzerne keinerlei Qualitätssicherung leisten?