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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.
Auf Windows Systemen ohne installiertes Microsoft Office ist die
Grundeinstellung, dass Dateien im .doc, .wri, oder .rtf Format mit
WordPad geoeffnet werden. Auf Systemen mit installiertem Office werden
in der Grundeinstellung .wri Dateien noch mit WordPad geoeffnet.
CVE-2009-0235 – Buffer Overflow im WordPad Text Converter fuer Word 97
Dateien
Im WordPad Konverter fuer Word 97 Dateien kann aufgrund einer nicht
naeher beschriebenen Schwachstelle ein Buffer Overflow beim Einlesen
von Dateien im Word 97 Format ausgeloest werden. Ein Angreifer kann
diese Schwachstelle dazu ausnutzen, beliebigen Code mit den Rechten
des Benutzers auszufuehren, wenn dieser eine entsprechend aufgebaute
Word 97 Datei oeffnet.
CVE-2009-0088 – Buffer Overflow im Word 2000 Konverter fuer WordPerfect
6.x Dateien
Der Konverter fuer WordPerfect 6.x Dateien in Microsoft Word 2000
ueberprueft die Laengen von eingelesenen Strings nicht ausreichend,
wodurch ein Buffer Overflow ausgeloest werden kann. Ein Angreifer kann
diese Schwachstelle dazu ausnutzen, beliebigen Code mit den Rechten
des Benutzers auszufuehren, wenn dieser eine entsprechend aufgebaute
WordPerfect 6.x Datei oeffnet.
CVE-2009-0087 – Schwachstelle in WordPad und MS Office Konverter fuer
Word 6 Dateien
In Windows WordPad und im Microsoft Office Konverter fuer Dateien im
Word 6 Format befindet sich eine nicht naeher beschriebene
Schwachstelle, durch die Datenstrukturen im Hauptspeicher
ueberschrieben werden. Angreifer koennen diese Schwachstelle dazu
ausnutzen, beliebigen Code mit den Rechten des Benutzers auszufuehren,
indem er den Benutzer dazu bringt, eine entsprechend aufgebaute .doc,
.wri, oder .rtf Datei zu oeffnen.
Die Schwachstelle wird bereits aktiv ausgenutzt und ein Exploit ist
frei verfuegbar.
CVE-2008-4841 – Buffer Overflow im WordPad Text Konverter fuer Word 97
Dateien
In Microsoft WordPad Text Converter fuer Word 97 Dateien laesst sich
ein Buffer Overflow beim Einlesen von Dateien im Word 97 Format
ausloesen, wenn eine entsprechend aufgebaute Listenstruktur in der
Datei enthalten ist. Ein entfernter Angreifer kann diese Schwachstelle
zum Ausfuehren beliebiger Befehle mit den Rechten des Benutzer
ausnutzen, indem er einen Benutzer dazu bringt, eine entsprechend
aufgebaute .doc, .wri, oder .rtf Datei zu oeffnen.
Die Schwachstelle wird bereits aktiv ausgenutzt und ein Exploit ist
frei verfuegbar.
Betroffen sind die folgenden Software Pakete und Plattformen:
WordPad
Microsoft Office 2000 Service Pack 3
Microsoft Office XP Service Pack 3
Microsoft Office Converter Pack
Microsoft Windows 2000 Service Pack 4
Windows XP Service Pack 2
Windows XP Service Pack 3
Windows XP Professional x64 Edition
Windows XP Professional x64 Edition Service Pack 2
Windows Server 2003 Service Pack 1
Windows Server 2003 Service Pack 2
Windows Server 2003 x64 Edition
Windows Server 2003 x64 Edition Service Pack 2
Windows Server 2003 mit SP1 fuer Itanium-basierte Systeme
Windows Server 2003 mit SP2 fuer Itanium-basierte Systeme
Vom Hersteller werden ueberarbeitete Pakete zur Verfuegung gestellt.
Hersteller Advisory:
http://www.microsoft.com/technet/security/bulletin/ms09-010.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
– —
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-2009.0028 — AUSCERT ALERT
[Win]
Wordpad and Office Text Converters: Execute Arbitrary Code
15 April 2009
===========================================================================
AusCERT Alert Summary
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Product: Microsoft Windows 2000 Service Pack 4
Windows XP Service Pack 2
Windows XP Service Pack 3
Windows XP Professional x64 Edition
Windows XP Professional x64 Edition Service Pack 2
Windows Server 2003 Service Pack 1
Windows Server 2003 Service Pack 2
Windows Server 2003 x64 Edition
Windows Server 2003 x64 Edition Service Pack 2
Windows Server 2003 with SP1 for Itanium-based
Systems
Windows Server 2003 with SP2 for Itanium-based
Systems
Microsoft Office 2000 Service Pack 3
Microsoft Office XP Service Pack 3
Microsoft Office Converter Pack
Publisher: Microsoft
Operating System: Windows
Impact: Execute Arbitrary Code/Commands
Access: Remote/Unauthenticated
CVE Names: CVE-2009-0235 CVE-2009-0088 CVE-2009-0087
CVE-2008-4841
Original Bulletin:
http://www.microsoft.com/technet/security/bulletin/MS09-010.mspx
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Microsoft Security Bulletin MS09-010 – Critical
Vulnerabilities in WordPad and Office Text Converters Could Allow Remote
Code Execution (960477)
Published: April 14, 2009
Version: 1.0
General Information
Executive Summary
This security update resolves two publicly disclosed vulnerabilities and
two privately reported vulnerabilities in Microsoft WordPad and Microsoft
Office text converters. The vulnerabilities could allow remote code
execution if a specially crafted file is opened in WordPad or Microsoft
Office Word. Do not open Microsoft Office, RTF, Write, or WordPerfect
files from untrusted sources using affected versions of WordPad or
Microsoft Office Word.
This security update is rated Critical for supported editions of Microsoft
Office Word 2000. This security update is also rated Important for
supported editions of Microsoft Office Word 2002; Microsoft Office
Converter Pack; and WordPad on all supported editions of Microsoft Windows
2000, Windows XP, and Windows Server 2003. For more information, see the
subsection, Affected and Non-Affected Software, in this section.
This security update addresses the vulnerabilities by modifying the way
that Microsoft Office Word and Office text converters handle opening
specially crafted Word 6.0, Windows Write, and WordPerfect documents. This
security update also addresses the vulnerabilities by implementing fixes
to WordPad and by preventing WordPad on affected platforms from opening
Word 6.0 and Windows Write files. For more information about the
vulnerabilities, see the Frequently Asked Questions (FAQ) subsection for
the specific vulnerability entry under the next section, Vulnerability
Information.
Recommendation. Microsoft recommends that customers apply the update
immediately.
Affected Software
Microsoft Windows 2000 Service Pack 4
Windows XP Service Pack 2 and Windows XP Service Pack 3
Windows XP Professional x64 Edition and Windows XP Professional x64
Edition Service Pack 2
Windows Server 2003 Service Pack 1 and Windows Server 2003 Service Pack 2
Windows Server 2003 x64 Edition and Windows Server 2003 x64 Edition
Service Pack 2
Windows Server 2003 with SP1 for Itanium-based Systems and Windows Server
2003 with SP2 for Itanium-based Systems
Microsoft Office 2000 Service Pack 3
Microsoft Office XP Service Pack 3
Microsoft Office Converter Pack
Vulnerability Information
WordPad and Office Text Converter Memory Corruption Vulnerability –
CVE-2009-0087
A remote code execution vulnerability exists in the way that text converters
in WordPad and Microsoft Office process memory when a user opens a specially
crafted Word 6 file that includes malformed data.
WordPad Word 97 Text Converter Stack Overflow Vulnerability – CVE-2008-4841
A remote code execution vulnerability exists in the way that Microsoft
WordPad processes memory when parsing a specially crafted Word 97 document.
The vulnerability could allow remote code execution if a user opens a
specially crafted Word file that includes a malformed list structure.
Word 2000 WordPerfect 6.x Converter Stack Corruption Vulnerability –
CVE-2009-0088
A remote code execution vulnerability exists in the way that the WordPerfect
6.x converter that is included with Microsoft Office Word 2000 processes
memory when parsing a specially crafted WordPerfect document.
WordPad Word 97 Text Converter Stack Overflow Vulnerability – CVE-2009-0235
A remote code execution vulnerability exists in WordPad as a result of
memory corruption when a user opens a specially crafted Word file.
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You have received this e-mail bulletin as a result of your organisation’s
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT’s members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation’s
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author’s website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
http://www.auscert.org.au/render.html?cid=1980
If you believe that your computer system has been compromised or attacked in
any way, we encourage you to let us know by completing the secure National IT
Incident Reporting Form at:
http://www.auscert.org.au/render.html?it=3192
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
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