Microsoft Outlook / Exchange TNEF Decoding Arbitrary Code Execution
Secunia Advisory: SA18368
Release Date: 2006-01-10
Last Update: 2006-05-04
Popularity: 18,345 views

Critical:
Highly critical
Impact: System access
Where: From remote
Solution Status: Vendor Patch

Software:Microsoft Exchange 2000 Enterprise Server
Microsoft Exchange 5
Microsoft Exchange 5.5
Microsoft Exchange Server 2000
Microsoft Outlook 2000
Microsoft Outlook 2002
Microsoft Outlook 2003

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CVE reference:CVE-2006-0002


Description:
NGSSoftware has reported a vulnerability in Microsoft Outlook / Exchange, which can be exploited by malicious people to compromise a vulnerable system.

The vulnerability is caused due to boundary error when decoding the Transport Neutral Encapsulation Format (TNEF) MIME attachment. This can be exploited to execute arbitrary code when the user opens or previews a specially crafted TNEF email message or when the Microsoft Exchange Server Information Store processes the message.

Solution:
Apply patches.

-- Microsoft Office 2000 Service Pack 3 --

Microsoft Outlook 2000:
http://www.microsoft.com/downloads/de...=64D0336D-F962-4AB1-A724-9F6BA2108CB9

Microsoft Office 2000 MultiLanguage Packs:
http://www.microsoft.com/downloads/de...=2C0FA7C7-91AA-49B4-9731-9E83E3E0823D

Microsoft Outlook 2000 English MultiLanguage Packs:
http://www.microsoft.com/downloads/de...=2C0FA7C7-91AA-49B4-9731-9E83E3E0823D

-- Microsoft Office XP Service Pack 3 --

Microsoft Outlook 2002:
http://www.microsoft.com/downloads/de...=9A85CEBB-0D9A-465D-A4BC-AF501562772D

Microsoft Office XP Multilingual User Interface Packs:
http://www.microsoft.com/downloads/de...=CCA9399A-6DA3-4163-8398-C58DC328182B

-- Microsoft Office 2003 Service Pack 1 and Service Pack 2 --

Microsoft Outlook 2003:
http://www.microsoft.com/downloads/de...=1D156043-B041-4305-8442-3C4E3B832788

Microsoft Office 2003 Multilingual User Interface Packs:
http://www.microsoft.com/downloads/de...=D69554AD-196F-4789-91E5-B2A753EED854

Microsoft Office 2003 Language Interface Packs:
http://www.microsoft.com/downloads/de...=db080de8-8193-4c32-9019-9980ecd6874a

-- Microsoft Exchange Server --

Microsoft Exchange Server 5.0 Service Pack 2:
http://www.microsoft.com/downloads/de...=0A8DF1C3-ABF9-4A21-9B49-81FA362B251F

Microsoft Exchange Server 5.5 Service Pack 4:
http://www.microsoft.com/downloads/de...=EC6BD30E-12DE-4CA1-9432-D2E73AF62427

Microsoft Exchange 2000 Server Pack 3 (with the Exchange 2000 Post-Service Pack 3 Update Rollup of August 2004):
http://www.microsoft.com/downloads/de...=372FF07F-C3CA-4301-8559-9B90344EDC02

Note: Microsoft Exchange Server 2003 SP1/SP2 are not affected.

Provided and/or discovered by:
John Heasman and Mark Litchfield of NGSSoftware.

Changelog:
2006-01-11: Updated "Other References" section.
2006-05-04: Added links to NGSSoftware advisory.

Original Advisory:
MS06-003 (KB902412):
http://www.microsoft.com/technet/security/Bulletin/MS06-003.mspx

NGSSoftware:
http://www.ngssoftware.com/advisories/tnefout.txt
http://www.ngssoftware.com/advisories/tnefexc.txt

Other References:
US-CERT VU#252146:
http://www.kb.cert.org/vuls/id/252146


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