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Insecure Library Loading
Highly critical

Microsoft Excel Multiple Vulnerabilities

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Release Date:  2009-06-09    Last Update:  2009-06-12    Views:  16,852

Secunia Advisory SA35364

Where:

From remote

Impact:

System access

Solution Status:

Vendor Patch

CVE Reference(s):

Description


Multiple vulnerabilities have been reported in Microsoft Excel, which can be exploited by malicious people to compromise a user's system.

1) An array-indexing error when processing certain records can be exploited to corrupt memory via a specially crafted Excel file.

2) An error when parsing certain records may result in a corrupted pointer being used when opening a specially crafted Excel
file.

3) An error when parsing certain records may result in a corrupted object being used when opening a specially crafted Excel file.

4) An error when parsing certain records can be exploited to corrupt memory when opening a specially crafted Excel file.

5) A boundary error when parsing certain records can be exploited to cause a stack-based buffer overflow when opening a specially crafted Excel file.

6) An error when parsing Qsir BIFF records (0x806) may result in a corrupted pointer being used when opening a specially crafted Excel file.

7) An integer overflow error when processing the number of strings in a file can be exploited to cause a heap-based buffer overflow via a specially crafted Excel file.

Successful exploitation of the vulnerabilities may allow execution of arbitrary code.


Solution:
Apply patches.

Further details available to Secunia VIM customers

Provided and/or discovered by:
1) Carsten Eiram, Secunia Research.
2-4) The vendor credits Bing Liu, Fortinet.
5) TELUS Security Labs Vulnerability Research Team.
6) an anonymous person, reported via ZDI.
7) Independently reported by:
* Carsten Eiram, Secunia Research.
* Sean Larsson and Joshua Drake, VeriSign iDefense Labs.

Original Advisory:
MS09-021 (KB969462, KB969661, KB969679, KB969680, KB969681, KB969682, KB969683, KB969685, KB969686, KB969737, KB971822, KB971824):
http://www.microsoft.com/technet/security/Bulletin/MS09-021.mspx

Secunia Research:
http://secunia.com/secunia_research/2009-1/
http://secunia.com/secunia_research/2009-12/

TELUS Security Labs:
http://telussecuritylabs.com/threats/show/FSC20090609-01

ZDI:
http://www.zerodayinitiative.com/advisories/ZDI-09-040/

iDefense:
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=805

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Microsoft Excel Multiple Vulnerabilities

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