Technical Description

Multiple vulnerabilities have been identified in Microsoft Excel, which could be exploited by attackers to take complete control of an affected system.

The first flaw is due to memory corruption errors when processing a malformed "SELECTION" record, which could be exploited by attackers to execute arbitrary commands by convincing a user to open a specially crafted Excel file.

The second vulnerability is due to a memory corruption error when processing a malformed "COLINFO" record, which could be exploited by attackers to execute arbitrary commands via a specially crafted Excel file.

The third issue is due to a memory corruption error when processing a malformed "OBJECT" record, which could be exploited by attackers to execute arbitrary commands by convincing a user to open a specially crafted Excel file.

The fourth vulnerability is due to a memory corruption error when processing a malformed "FNGROUPCOUNT" value, which could be exploited by attackers to execute arbitrary commands via a specially crafted Excel file.

The fifth flaw is due to a memory corruption error when processing a malformed "LABEL" record, which could be exploited by attackers to execute arbitrary commands by convincing a user to open a specially crafted Excel file.

The sixth vulnerability is due to a memory corruption error when processing a malformed file, which could be exploited by attackers to execute arbitrary commands via a specially crafted Excel file.

The seventh issue is due to a memory corruption error when processing a malformed Excel file, which could be exploited by attackers to execute arbitrary commands via a specially crafted document. For additional information, see : FrSIRT/ADV-2006-2361

Credits

Vulnerabilities reported by Posidron, NSFocus Security Team, Arnaud Dovi, iDEFENSE, Sowhat, Xin Ouyang, Shaun Colley, and Costin Ionescu.

ChangeLog

2006-07-11 : Initial release

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