Vulnerability identifier: #VU1273

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-2008-3704

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Microsoft Visual FoxPro
Universal components / Libraries / Software for developers
Microsoft Visual Basic
Universal components / Libraries / Software for developers
Microsoft Visual Studio .NET
Universal components / Libraries / Software for developers

Vendor: Microsoft

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

The weakness exists due to a buffer overflow in the Masked Edit ActiveX Control. A remote attacker can construct a specially crafted Web page, trick the victim into viewing 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.

Note: the vulnerability was being actively exploited.

Mitigation
Install update from vendor's website:

Microsoft Visual Basic 6.0 Runtime Extended Files:
https://www.microsoft.com/downloads/details.aspx?familyid=E27EEBCB-095D-43EC-A19E-4A46E591715C
Microsoft Visual Studio .NET 2002 Service Pack 1:
https://www.microsoft.com/downloads/details.aspx?familyid=AFAD980D-7F27-49D9-AA23-B762C7B94CD6
Microsoft Visual Studio .NET 2003 Service Pack 1:
https://www.microsoft.com/downloads/details.aspx?familyid=6AC7CF8F-D046-43A8-B4EF-253153D65AED
Microsoft Visual FoxPro 8.0 Service Pack 1:
https://www.microsoft.com/downloads/details.aspx?familyid=A6977F81-F7F6-486B-96AD-8D296D79F205
Microsoft Visual FoxPro 9.0 Service Pack 1:
https://www.microsoft.com/downloads/details.aspx?familyid=386D27A6-B2C7-4ACC-BF3E-EDCBC7358172
Microsoft Visual FoxPro 9.0 Service Pack 2:
https://www.microsoft.com/downloads/details.aspx?familyid=5B1F28A9-DA8D-463A-8AE4-DFC8FCC6C41A

Vulnerable software versions

Microsoft Visual FoxPro: 8.0 - 9.0

Microsoft Visual Basic: 6.0

Microsoft Visual Studio .NET: 2002 - 2003

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External links
http://technet.microsoft.com/en-us/library/security/ms08-070.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.