Buffer overflow in Microsoft Excel

Published: 2007-02-02 | Updated: 2016-12-06

Risk	Critical
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2007-0671
CWE-ID	CWE-119
Exploitation vector	Network
Public exploit	This vulnerability is being exploited in the wild.
Vulnerable software Subscribe	Microsoft Office Client/Desktop applications / Office applications Microsoft Project Client/Desktop applications / Office applications Microsoft Office for Mac Client/Desktop applications / Office applications Microsoft Visio Client/Desktop applications / Office applications Word Viewer Client/Desktop applications / Office applications Excel Viewer Client/Desktop applications / Office applications
Vendor	Microsoft

Security Bulletin

This security bulletin contains one critical risk vulnerability.

1) Buffer overflow

EUVDB-ID: #VU1221

Risk: Critical

CVSSv3.1: 8.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C]

CVE-ID: CVE-2007-0671

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote user to execute arbitrary code on the target system.

The vulnerability exists due to boundary error when handling malformed records in Excel files. A remote attacker can create a specially crafted Excel file, trick the victim into opening it and execute arbitrary code with privileges of the current user.

Successful exploitation of the vulnerability results in compromise of vulnerable system.

Note: this vulnerability is being actively exploited.

Mitigation

Install the following patch:

Microsoft Office 2000 Service Pack 3 — Download the update (KB 929062)

Microsoft Office XP Service Pack 3 — Download the update (KB929063)

Microsoft Office 2003 Service Pack 2 — Download the update (KB929064)

Microsoft Project 2000 Service Release 1 — Download the update (KB929062)

Microsoft Project 2002 Service Pack 1 — Download the update (KB929063)

Microsoft Visio 2002 Service Pack 2 — Download the update (KB929063)

Microsoft Office 2004 for Mac — Download the update (KB932185)

Vulnerable software versions

Microsoft Office: 2000 Service Pack 3 - XP

Microsoft Project: 2000 - 2002

Microsoft Office for Mac: 2004

Microsoft Visio: 2002

Word Viewer: 2003

Excel Viewer: 2003

External links

http://technet.microsoft.com/library/security/932553
http://technet.microsoft.com/library/security/ms07-015

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website or open a file.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.