#VU7121 Buffer overflow in Windows Server and Windows - CVE-2017-8487

Vulnerability identifier: #VU7121

Vulnerability risk: High

CVSSv4.0: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber]

CVE-ID: CVE-2017-8487

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: Yes

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

Vendor: Microsoft

Description

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

The vulnerability exists due to boundary error in Microsoft Windows OLE implementation in olecnv32.dll in Microsoft Windows XP and 2003. A remote unauthenticated attacker can create a specially crafted file or program, trick the victim into opening it and execute arbitrary code on the target system with privileges of the current user. 

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Note: this vulnerability is being exploited in the wild.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Windows Server: 2003

Windows: XP

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External links
https://support.microsoft.com/en-us/help/4025218/security-update-for-windows-xp-and-windows-server-2...
https://technet.microsoft.com/en-us/library/security/4025685.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.