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Insecure Library Loading
Highly critical

Microsoft Office Excel Multiple Vulnerabilities

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Description


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

1) An error when processing the "SerAuxErrBar" record can be exploited to cause a heap-based buffer overflow via a specially crafted file.

2) An input validation error can be exploited to corrupt memory via a specially crafted file.

3) A use-after-free error when processing the "SST" record can be exploited via a specially crafted file.

4) A boundary error when processing Feature11/Feature12 records can be exploited to cause a stack-based buffer overflow via a specially crafted file.

Successful exploitation of the vulnerabilities allows execution of arbitrary code, but requires tricking a user into opening a malicious file.


Solution:
Apply patches.

Further details available to Secunia VIM customers

Provided and/or discovered by:
4) An anonymous person via ZDI.

The vendor credits:
1) Sean Larsson via iDefense.
2, 3) An anonymous person via iDefense.

Original Advisory:
MS12-076 (KB2597126, KB2687307, KB2687311, KB2687313, KB2687481, KB2764047, KB2764048):
http://technet.microsoft.com/en-us/security/bulletin/ms12-076

ZDI:
http://www.zerodayinitiative.com/advisories/ZDI-12-184/

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 Office Excel Multiple Vulnerabilities

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