Vulnerability identifier: #VU1241

Vulnerability 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-2007-3899

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Microsoft Office
Client/Desktop applications / Office applications
Microsoft Office for Mac
Client/Desktop applications / Office applications
Microsoft Word
Client/Desktop applications / Office applications

Vendor: Microsoft

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 strings in Word document. A remote attacker can create a specially crafted MS Word document, 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:
https://www.microsoft.com/downloads/details.aspx?FamilyId=8B3072FB-5933-47F7-A498-13A93E268E57
Microsoft Office XP Service Pack 3:
https://www.microsoft.com/downloads/details.aspx?FamilyId=D6B787BB-03FF-4F67-8B69-6011FB18BA7
Microsoft Office 2004 for Mac:
https://www.microsoft.com/mac/downloads.aspx#Office2004

Vulnerable software versions

Microsoft Office: 2000

Microsoft Office for Mac: 2004

Microsoft Word:

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External links
http://technet.microsoft.com/en-us/library/security/ms07-060.aspx

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Q & A

Can this vulnerability be exploited remotely?

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

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.