Microsoft Office Excel FNGROUPCOUNT buffer overflow

excel-fngroupcount-bo (27464)

High Risk

Description:

Microsoft Office is vulnerable to a buffer overflow. By creating a malicious Excel file containing a malicious FNGROUPCOUNT value , a remote attacker could overflow a buffer and execute arbitrary code on the system with privileges of the user, once the Excel file is opened. An attacker could exploit this vulnerability by sending the malicious file to a victim as an email attachment or hosting it on a Web site.

*CVSS:

Base Score:	5.6
Access Vector:	Remote
Access Complexity:	High
Authentication:	Not Required
Confidentiality Impact:	Partial
Integrity Impact:	Partial
Availability Impact:	Partial
Temporal Score:	4.1
Exploitability:	Unproven
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

Gain Access

Remedy:

Apply the appropriate patch for your system, as listed in the latest Microsoft Security Bulletin. See References.

— OR —

Use Microsoft Automatic Update if it is supported by your operating system. The original bulletin issued by Microsoft has been superseded.

References:

• Full-Disclosure Mailing List, Tue Jul 11 2006 - 22:11:24 CDT: Microsoft Excel Could Allow Remote Code Execution by Malformed FNGROUPCOUNT value Vulnerability.
• Microsoft Security Bulletin MS06-037: Vulnerability in Microsoft Excel Could Allow Remote Code Execution (917285).
• Microsoft Security Bulletin MS06-059: Vulnerabilities in Microsoft Excel Could Allow Remote Code Execution (924164).
• Microsoft Security Bulletin MS07-002: Vulnerabilities in Microsoft Excel Could Allow Remote Code Execution (927198).
• Microsoft Security Bulletin MS07-023: Vulnerabilities in Microsoft Excel Could Allow Remote Code Execution (934233).
• Microsoft Security Bulletin MS07-036: Vulnerabilities in Microsoft Excel Could Allow Remote Code Execution (936542).
• Microsoft Security Bulletin MS07-044: Vulnerability in Microsoft Excel Could Allow Remote Code Execution (940965).
• Microsoft Security Bulletin MS08-014: Vulnerabilities in Microsoft Excel Could Allow Remote Code Execution (949029).
• Microsoft Security Bulletin MS08-026: Vulnerabilities in Microsoft Word Could Allow Remote Code Execution (951207).
• Microsoft Security Bulletin MS08-042: Vulnerability in Microsoft Word Could Allow Remote Code Execution (955048).
• Microsoft Security Bulletin MS08-043: Vulnerabilities in Microsoft Excel Could Allow Remote Code Execution (954066).
• Microsoft Security Bulletin MS08-051: Vulnerabilities in Microsoft PowerPoint Could Allow Remote Code Execution (949785).
• Microsoft Security Bulletin MS08-052: Vulnerabilities in GDI+ Could Allow Remote Code Execution (954593).
• Microsoft Security Bulletin MS08-057: Vulnerabilities in Microsoft Excel Could Allow Remote Code Execution (956416).
• Microsoft Security Bulletin MS09-004: Vulnerability in Microsoft SQL Server Could Allow Remote Code Execution (959420).
• Microsoft Security Bulletin MS09-017: Vulnerabilities in Microsoft Office PowerPoint Could Allow Remote Code Execution (967340).
• Microsoft Security Bulletin MS09-021: Vulnerabilities in Microsoft Office Excel Could Allow Remote Code Execution (969462).
• Microsoft Security Bulletin MS09-062: Vulnerabilities in GDI+ Could Allow Remote Code Execution (957488).
• Microsoft Security Bulletin MS09-067: Vulnerabilities in Microsoft Office Excel Could Allow Remote Code Execution (972652).
• Microsoft Security Bulletin MS10-003: Vulnerability in Microsoft Office (MSO) Could Allow Remote Code Execution (978214).
• Microsoft Security Bulletin MS10-004: Vulnerabilities in Microsoft Office PowerPoint Could Allow Remote Code Execution (975416).
• Microsoft Security Bulletin MS10-017: Vulnerabilities in Microsoft Office Excel Could Allow Remote Code Execution (980150).
• Microsoft Security Bulletin MS10-017: Vulnerabilities in Microsoft Office Excel Could Allow Remote Code Execution (980150).
• Microsoft Security Bulletin MS10-028: Vulnerabilities in Microsoft Visio Could Allow Remote Code Execution (980094).
• Microsoft Security Bulletin MS10-036: Vulnerabilities in COM validation in Microsoft Office Could Allow Remote Code Execution (983235.
• Microsoft Security Bulletin MS10-038: Vulnerabilities in Microsoft Office Excel Could Allow Remote Code Execution (2027452).
• Microsoft Security Bulletin MS10-056: Vulnerabilities in Microsoft Office Word Could Allow Remote Code Execution (2269638).
• Microsoft Security Bulletin MS10-057: Vulnerability in Microsoft Office Excel Could Allow Remote Code Execution (2269707).
• Microsoft Security Bulletin MS10-079: Vulnerabilities in Microsoft Word Could Allow Remote Code Execution (2293194).
• Microsoft Security Bulletin MS10-087: Vulnerabilities in Microsoft Office Could Allow Remote Code Execution (2423930).
• Microsoft Security Bulletin MS10-105: Vulnerabilities in Microsoft Office Graphics Filters Could Allow for Remote Code Execution (968095).
• Microsoft Security Bulletin MS11-008: Vulnerabilities in Microsoft Visio Could Allow Remote Code Execution (2451879).
• Microsoft Security Bulletin MS11-021: Vulnerabilities in Microsoft Excel Could Allow Remote Code Execution (2489279).
• Microsoft Security Bulletin MS11-023: Vulnerabilities in Microsoft Office Could Allow Remote Code Execution (2489293).
• Microsoft Security Bulletin MS11-029: Vulnerability in GDI+ Could Allow Remote Code Execution (2489979).
• Microsoft Security Bulletin MS11-045: Vulnerabilities in Microsoft Excel Could Allow Remote Code Execution (2537146).
• Microsoft Security Bulletin MS11-049: Vulnerability in the Microsoft XML Editor Could Allow Information Disclosure (2543893).
• Microsoft Security Bulletin MS11-060: Vulnerabilities in Microsoft Visio Could Allow Remote Code Execution (2560978).
• Microsoft Security Bulletin MS11-072: Vulnerabilities in Microsoft Excel Could Allow Remote Code Execution (2587505).
• Microsoft Security Bulletin MS11-072: Vulnerabilities in Microsoft Excel Could Allow Remote Code Execution (2587505).
• Microsoft Security Bulletin MS11-072: Vulnerabilities in Microsoft Excel Could Allow Remote Code Execution (2587505).
• Microsoft Security Bulletin MS11-096: Vulnerability in Microsoft Excel Could Allow Remote Code Execution (2640241).
• Microsoft Security Bulletin MS11-096: Vulnerability in Microsoft Excel Could Allow Remote Code Execution (2640241).
• Microsoft Security Bulletin MS11-096: Vulnerability in Microsoft Excel Could Allow Remote Code Execution (2640241).
• Microsoft Security Bulletin MS12-028: Vulnerability in Microsoft Office Could Allow for Remote Code Execution (2639185).
• Microsoft Security Bulletin MS12-029: Vulnerability in Microsoft Word Could Allow Remote Code Execution (2680352).
• Microsoft Security Bulletin MS12-034: Combined Security Update for Microsoft Office, Windows, .NET Framework, and Silverlight (2681578).
• Microsoft Security Bulletin MS12-057: Vulnerability in Microsoft Office Could Allow for Remote Code Execution (2731879).
• Microsoft Security Bulletin MS12-064: Vulnerabilities in Microsoft Word Could Allow Remote Code Execution (2742319).
• Microsoft Security Bulletin MS12-064: Vulnerabilities in Microsoft Word Could Allow Remote Code Execution (2742319).
• Microsoft Security Bulletin MS12-065: Vulnerability in Microsoft Works Could Allow Remote Code Execution (KB2754670).
• Microsoft Security Bulletin MS12-070: Vulnerability in SQL Server Could Allow Elevation of Privilege (2754849).
• Microsoft Security Bulletin MS12-079: Vulnerability in Microsoft Word Could Allow Remote Code Execution (2780642).
• Microsoft Security Bulletin MS12-079: Vulnerability in Microsoft Word Could Allow Remote Code Execution (2780642).
• Microsoft Security Bulletin MS13-022: Vulnerability in Silverlight Could Allow Remote Code Execution (2814124).
• Microsoft Security Bulletin MS13-043: Vulnerability in Microsoft Word Could Allow Remote Code Execution (2830399).
• Microsoft Security Bulletin MS13-043: Vulnerability in Microsoft Word Could Allow Remote Code Execution (2830399).
• ASA-2006-135: Windows Security Updates for July 2006 - (MS06-033 - MS06-039)
• BID-18890: Microsoft Excel FNGROUPCOUNT Record Remote Code Execution Vulnerability
• CVE-2006-1308: Unspecified vulnerability in Microsoft Excel 2000 through 2004 allows user-assisted attackers to execute arbitrary code via a .xls file with a crafted FNGROUPCOUNT value.
• SECTRACK ID: 1016472: Microsoft Excel Errors in Processing Various Malformed Records Let Remote Users Execute Arbitrary Code
• VUPEN/ADV-2006-2755: Microsoft Excel Document Handling Multiple Code Execution Vulnerabilities (MS06-037)

Platforms Affected:

• Microsoft Excel 2000
• Microsoft Excel 2002
• Microsoft Excel 2003
• Microsoft Excel 2004 Mac OS
• Microsoft Excel XP
• Microsoft Excel Viewer 2003
• Microsoft Office 2000 SP3
• Microsoft Office 2003 SP1
• Microsoft Office 2003 SP2
• Microsoft Office 2004
• Microsoft Office X Mac OS
• Microsoft Office XP SP3

Reported:

Jul 11, 2006

The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall the author/distributor (IBM Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

For corrections or additions please email ignore thisxforceignore this@ignore thisus.ignore thisibm.comignore this

Return to the main page

* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

About IBM Internet Security Systems

IBM Internet Security Systems is a trusted security advisor to thousands of the world's leading businesses and governments, helping to provide pre-emptive protection for networks, desktops and servers. The IBM Proventia? integrated security platform is designed to automatically protect against both known and unknown threats, helping to keep networks up and running and shield customers from online attacks before they impact business assets. IBM Internet Security Systems products and services are based on the proactive security intelligence of its X-Force? research and development team ? an unequivocal world authority in vulnerability and threat research. The IBM Internet Security Systems product line is also complemented by comprehensive Managed Security Services and Professional Security Services. For more information, visit the IBM Internet Security Systems Web site at www.iss.net or call 800-776-2362.