[MS] Mehrere Schwachstellen in Excel - MS09-021

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Liebe Kolleginnen und Kollegen,

soeben erreichte uns nachfolgende Warnung des Microsoft Product Security
Notification Service. Wir geben diese Informationen unveraendert an Sie
weiter.

CVE-2009-1134 – Schwachstelle in Excel

Eine Schwachstelle in MS Excel fuehrt dazu, dass beim Parsen
bestimmter Records aus Excel Dateien (.xls) Zeiger ueberschrieben
werden und infolgedessen beliebiger Code mit den Rechten des Benutzers
ausgefuehrt werden kann, wenn dieser eine entsprechend aufgebaute
Datei oeffnet.

CVE-2009-0561 – Integer Overflow in Excel beim Parsen von Strings

Beim Berechnen der Anzahl von Strings in einer Excel Datei kann in MS
Excel ein Integer Overflow ausgeloest werden, wodurch ein zu kleiner
Bereich des Hauptspeichers fuer die Strings angefordert wird, was
wiederum zu einem Heap Overflow fuehrt. Die Schwachstelle laesst sich
dazu ausnutzen, beliebigen Code mit den Rechten des Benutzers
auszufuehren, wenn diese eine entsprechend aufgebaute .xls Datei
oeffnet.

CVE-2009-0560 – Schwachstelle in Excel beim Parsen von Formel Records

In MS Excel koennen beim Parsen von fehlerhaft formatierten Formel
(0x06) Records aus Excel Spreadsheets Teile des Hauptspeichers
ueberschrieben werden. Die Schwachstelle laesst sich dazu ausnutzen,
beliebigen Code mit den Rechten des Benutzers auszufuehren,
vorausgesetzt dass Opfer oeffnet eine entsprechend aufgebaute
Excel-Datei (.xls).

CVE-2009-0559 – Buffer Overflow beim Kopieren von Strings in Excel

Beim Kopieren von Strings aus einem Satz von Records kann in MS Excel
ein Buffer Overflow ausgeloest werden. Angreifer koennen diese
Schwachstelle dazu ausnutzen, beliebigen Code mit den Rechten des
Benutzers auszufuehren, wenn sie ihn dazu bringen, eine entsprechend
aufgebaute Excel Datei (.xls) zu oeffnen.

CVE-2009-0558 – Fehlerhafte Array-Indizierung in Excel

Beim Parsen bestimmter Records berechnet MS Excel die Array-Indizes
falsch und ueberschreibt Teile des Hauptspeichers. Angreifer koennen
diese Schwachstelle dazu ausnutzen, beliebigen Code mit den Rechten
des Benutzers auszufuehren, wenn sie ihn dazu bringen, eine
entsprechend aufgebaute Excel Datei (.xls) zu oeffnen.

CVE-2009-0557 – Schwachstelle in Excel beim Parsen von Object Records

Ein Fehler beim Parsen von Object (0x5d) Records aus Excel Dateien
(.xls) fuehrt dazu, dass Speicherbereiche ueberschrieben werden
koennen. Angreifer koennen diese Schwachstelle dazu ausnutzen,
beliebigen Code mit den Rechten des Benutzers auszufuehren, wenn
dieser eine entsprechend aufgebaute Excel Datei oeffnet.

CVE-2009-0549 – Schwachstelle in Excel beim Parsen von BRAI Records

In MS Excel kann beim Parsen von fehlerhaft formatierten BRAI(0x1051)
Records aus Excel Spreadsheets ein Zeiger so ueberschrieben werden,
dass er auf vom Angreifer waehlbare Speicherbereiche zeigt.
Infolgedessen laesst sich die Schwachstelle dazu ausnutzen, beliebigen
Code mit den Rechten des Benutzers auszufuehren, vorausgesetzt dass
Opfer oeffnet eine entsprechend aufgebaute Excel-Datei (.xls).

Betroffen sind die folgenden Software Pakete und Plattformen:

Microsoft Office 2000 Service Pack 3
Microsoft Office XP Service Pack 3
Microsoft Office 2003 Service Pack 3
2007 Microsoft Office System Service Pack 1
2007 Microsoft Office System Service Pack 2

Microsoft Office 2004 fuer Mac
Microsoft Office 2008 fuer Mac
Open XML File Format Converter fuer Mac

Microsoft Office Excel Viewer 2003 Service Pack 3
Microsoft Office Excel Viewer
Microsoft Office Compatibility Pack fuer Word, Excel und PowerPoint
2007 File Formate Service Pack 1
Microsoft Office Compatibility Pack fuer Word, Excel und PowerPoint
2007 File Formate Service Pack 2
Microsoft Office SharePoint Server 2007 Service Pack 1 (32-Bit Edition)
Microsoft Office SharePoint Server 2007 Service Pack 2 (32-Bit Edition)
Microsoft Office SharePoint Server 2007 Service Pack 1 (64-Bit Edition)
Microsoft Office SharePoint Server 2007 Service Pack 2 (64-Bit Edition)

Nicht betroffen sind das Microsoft Office Converter Pack sowie Works
8.5 und 9

Alle Windows Versionen, auf denen die betroffene Software laeut

Vom Hersteller werden ueberarbeitete Pakete zur Verfuegung gestellt.

Hersteller Advisory:
http://www.microsoft.com/technet/security/bulletin/ms09-021.mspx

(c) der deutschen Zusammenfassung bei DFN-CERT Services GmbH; die
Verbreitung, auch auszugsweise, ist nur unter Hinweis auf den Urheber,
DFN-CERT Services GmbH, und nur zu nicht kommerziellen Zwecken
gestattet.

Mit freundlichen Gruessen,
Klaus Moeller, DFN-CERT

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Dipl. Inform. Klaus Moeller (Incident Response Team)
Phone: +49 40 808077-555, Fax: +49 40 808077-556

DFN-CERT Services GmbH, https://www.dfn-cert.de, Phone +49 40 808077-555
Sitz / Register: Hamburg, AG Hamburg, HRB 88805, Ust-IdNr.: DE 232129737
Sachsenstrase 5, 20097 Hamburg/Germany, CEO: Dr. Klaus-Peter Kossakowski

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===========================================================================
A U S C E R T A L E R T

AL-2009.0049 — AUSCERT ALERT
[Win][Mac][OSX]
Microsoft Office Excel – Execute Arbitrary Code
10 June 2009

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AusCERT Alert Summary
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Product: Microsoft Office Excel
Publisher: Microsoft
Operating System: Windows
Mac OS X
Impact: Execute Arbitrary Code/Commands
Access: Remote/Unauthenticated
CVE Names: CVE-2009-1134 CVE-2009-0561 CVE-2009-0560
CVE-2009-0559 CVE-2009-0558 CVE-2009-0557
CVE-2009-0549

Original Bulletin:
http://www.microsoft.com/technet/security/bulletin/ms09-021.mspx

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Microsoft Security Bulletin MS09-021 – Critical

Vulnerabilities in Microsoft Office Excel Could Allow Remote Code Execution
(969462)

Published: June 9, 2009

Version: 1.0

General Information

Executive Summary

This security update resolves several privately reported
vulnerabilities that could allow remote code execution if a user opens
a specially crafted Excel file that includes a malformed record object.
An attacker who successfully exploited any of these vulnerabilities
could take complete control of an affected system. An attacker could
then install programs; view, change, or delete data; or create new
accounts with full user rights.

This security update is rated Critical for all supported editions of
Microsoft Office Excel 2000. For all supported editions of Microsoft
Office Excel 2002, Microsoft Office Excel 2003, Microsoft Office Excel
2007, Microsoft Office 2004 for Mac, and Microsoft Office 2008 for Mac;
Open XML File Format Converter for Mac; and all supported versions of
Microsoft Office Excel Viewer and Microsoft Office Compatibility Pack,
this security update is rated Important.

The update addresses the vulnerabilities by modifying the way that
Excel parses Excel files.

Affected Software

Microsoft Office Excel 2000 Service Pack 3
Microsoft Office Excel 2002 Service Pack 3
Microsoft Office Excel 2003 Service Pack 3
Microsoft Office Excel 2007 Service Pack 1 and
Microsoft Office Excel 2007 Service Pack 2
(For Microsoft Office Excel 2007 Service Pack 1 and
Microsoft Office Excel 2007 Service Pack 2, customers also
need to install the security update for
Microsoft Office Compatibility Pack for Word, Excel, and
PowerPoint 2007 File Formats Service Pack 1 and
Microsoft Office Compatibility Pack for Word, Excel, and
PowerPoint 2007 File Formats Service Pack 2)
Microsoft Office 2004 for Mac
Microsoft Office 2008 for Mac
Open XML File Converter for Mac
Microsoft Office Excel Viewer 2003 Service Pack 3
Microsoft Office Excel Viewer
Microsoft Office Compatibility Pack for Word, Excel, and
PowerPoint 2007 File Formats Service Pack 1 and
Microsoft Office Compatibility Pack for Word, Excel, and
PowerPoint 2007 File Formats Service Pack 2
Microsoft Office SharePoint Server 2007 Service Pack 1 and
Microsoft Office SharePoint Server 2007 Service Pack 2
(32-bit editions)
(This update applies to servers that have Excel Services
installed, such as the default configuration of
Microsoft Office SharePoint Server 2007 Enterprise and
Microsoft Office SharePoint Server 2007 For Internet Sites.
Microsoft Office SharePoint Server 2007 Standard does not
include Excel Services.)
Microsoft Office SharePoint Server 2007 Service Pack 1 and
Microsoft Office SharePoint Server 2007 Service Pack 2
(64-bit editions)
(This update applies to servers that have Excel Services
installed, such as the default configuration of
Microsoft Office SharePoint Server 2007 Enterprise and
Microsoft Office SharePoint Server 2007 For Internet Sites.
Microsoft Office SharePoint Server 2007 Standard does not
include Excel Services.)

Vulnerability Information

Record Pointer Corruption Vulnerability – CVE-2009-0549

A remote code execution vulnerability exists in Microsoft Office Excel
that could allow remote code execution if a user opens a specially
crafted Excel file that includes a malformed record object. An attacker
who successfully exploited this vulnerability could take complete
control of an affected system. An attacker could then install programs;
view, change, or delete data; or create new accounts with full user
rights.

Object Record Corruption Vulnerability – CVE-2009-0557

A remote code execution vulnerability exists in Microsoft Office Excel
that could allow remote code execution if a user opens a specially
crafted Excel file that includes a malformed record object. An attacker
who successfully exploited this vulnerability could take complete
control of an affected system. An attacker could then install programs;
view, change, or delete data; or create new accounts with full user
rights.

Array Indexing Memory Corruption Vulnerability – CVE-2009-0558

A remote code execution vulnerability exists in Microsoft Office Excel
that could allow remote code execution if a user opens a specially
crafted Excel file that includes a malformed record object. An attacker
who successfully exploited this vulnerability could take complete
control of an affected system. An attacker could then install programs;
view, change, or delete data; or create new accounts with full user
rights.

String Copy Stack-Based Overrun Vulnerability – CVE-2009-0559

A remote code execution vulnerability exists in Microsoft Office Excel
that could allow remote code execution if a user opens a specially
crafted Excel file that includes a malformed record object. An attacker
who successfully exploited this vulnerability could take complete
control of an affected system. An attacker could then install programs;
view, change, or delete data; or create new accounts with full user
rights.

Field Sanitization Memory Corruption Vulnerability – CVE-2009-0560

A remote code execution vulnerability exists in Microsoft Office Excel
that could allow remote code execution if a user opens a specially
crafted Excel file that includes a malformed record object. An attacker
who successfully exploited this vulnerability could take complete
control of an affected system. An attacker could then install programs;
view, change, or delete data; or create new accounts with full user
rights.

Record Integer Overflow Vulnerability – CVE-2009-0561

A remote code execution vulnerability exists in Microsoft Office Excel
that could allow remote code execution if a user opens a specially
crafted Excel file that includes a malformed record object. An attacker
who successfully exploited this vulnerability could take complete
control of an affected system. An attacker could then install programs;
view, change, or delete data; or create new accounts with full user
rights.

Record Pointer Corruption Vulnerability – CVE-2009-1134

A remote code execution vulnerability exists in Microsoft Office Excel
that could allow remote code execution if a user opens a specially
crafted Excel file that includes a malformed record object. An attacker
who successfully exploited this vulnerability could take complete
control of an affected system. An attacker could then install programs;
view, change, or delete data; or create new accounts with full user
rights.

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