Microsoft Excel fails to properly process a malformed Column record

2007-01-09T00:00:00
ID VU:302836
Type cert
Reporter CERT
Modified 2007-01-23T00:00:00

Description

Overview

Microsoft Excel contains a memory corruption vulnerability that could enable an attacker to exectue arbitrary code and gain complete control of the vulnerable system.

Description

Microsoft Excel fails to properly handle malformed Column records. When an Excel file is opened, Excel does not properly perform data validation on the Column record. An attacker could send a specially crafted Column record in the Excel file that, when opened, could corrupt system memory allowing the attacker to execute arbitrary code. The attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.


Impact

An attacker could gain complete control of the affected system and execute arbitrary code.


Solution

Microsoft addresses this vulnerability with the updates listed in Microsoft Security Bulletin MS07-002.

Note that Microsoft has re-released the updates in Microsoft Security Bulletin MS07-002 for Excel 2000. See the Microsoft Security Response Center blog for more information.


Users whose accounts are configured to have fewer user rights on the system could be less affected than users who operate with administrative user rights.


Systems Affected

Vendor| Status| Date Notified| Date Updated
---|---|---|---
Microsoft Corporation| | -| 23 Jan 2007
If you are a vendor and your product is affected, let us know.

CVSS Metrics

Group | Score | Vector
---|---|---
Base | N/A | N/A
Temporal | N/A | N/A
Environmental | N/A | N/A

References

  • <http://www.microsoft.com/technet/security/Bulletin/MS07-002.mspx>
  • <http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=460>
  • <http://www.securityfocus.com/bid/21925>
  • <http://securitytracker.com/alerts/2007/Jan/1017487.html>
  • <http://blogs.technet.com/msrc/archive/2007/01/18/re-release-of-ms07-002-for-excel-2000.aspx>

Credit

Thanks to Greg MacManus of iDefense Labs for reporting this vulnerability.

This document was written by Joseph Pruszynski.

Other Information

  • CVE IDs: CVE-2007-0030
  • Date Public: 09 Jan 2007
  • Date First Published: 09 Jan 2007
  • Date Last Updated: 23 Jan 2007
  • Severity Metric: 60.24
  • Document Revision: 14