Vulnerability identifier: #VU1278

Vulnerability risk: High

CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2009-0235

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Windows
Operating systems & Components / Operating system
Windows Server
Operating systems & Components / Operating system

Vendor: Microsoft

Description
The vulnerability alows a remote authenticated attacker to execute arbitrary code on the target system.

The weakness exists due to buffer overflow when parsing a malformed Word 97 document in Microsoft WordPad. A remote attacker can create a specially crafted Word file, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system with privileges of the current user.

Successful exploitation of the vulnerability results in arbitrary code execution on the vulnerable system.

Mitigation
Install update from vendor's website:

Microsoft Windows 2000 Service Pack 4:
https://www.microsoft.com/downloads/details.aspx?familyid=552d322a-5282-42c7-9c1e-1d8c494a7318
Windows XP Service Pack 2:
https://www.microsoft.com/downloads/details.aspx?familyid=50a8519a-503e-43dd-a78a-c1bc764fd213
Windows XP Service Pack 3:
https://www.microsoft.com/downloads/details.aspx?familyid=50a8519a-503e-43dd-a78a-c1bc764fd213
Windows XP Professional x64 Edition and Windows XP Professional x64 Edition Service Pack 2:
https://www.microsoft.com/downloads/details.aspx?familyid=323f4211-5add-4e02-bce1-e5a1b489982c
Windows Server 2003 Service Pack 1 and Windows Server 2003 Service Pack 2:
https://www.microsoft.com/downloads/details.aspx?familyid=2233a4d2-7c8a-4c89-b020-100d9afb43c8
Windows Server 2003 x64 Edition and Windows Server 2003 x64 Edition Service Pack 2:
https://www.microsoft.com/downloads/details.aspx?familyid=323f4211-5add-4e02-bce1-e5a1b489982c
Windows Server 2003 with SP1 for Itanium-based Systems and Windows Server 2003 with SP2 for Itanium-based Systems:
https://www.microsoft.com/downloads/details.aspx?familyid=e840b9cb-f1f4-482a-aa07-eb6b42b477c4

Vulnerable software versions

Windows: 2000, XP

Windows Server: 2003

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External links
http://technet.microsoft.com/en-us/library/security/ms09-010.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.