#VU1155 Scripting engine memory corruption - CVE-2016-7240

Vulnerability identifier: #VU1155

Vulnerability risk: High

CVSSv4.0: 7.3 [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:P/U:Amber]

CVE-ID: CVE-2016-7240

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:

Vendor:

Description

A remote attacker can execute arbitrary code on the target system.

The vulnerability exists due to incorrect handling of objects in memory within Microsoft scripting engines render. A remote attacker can create a specially crafted web page or Microsoft Office file with embedded malicious ActiveX component, trick the victim to open it in browser and cause memory corruption.

Successful exploitation of the vulnerability may allow an attacker to execute arbitrary code on vulnerable system with privileges of the current user.

Mitigation

Windows 10 for 32-bit Systems:
https://support.microsoft.com/kb/3198585
Windows 10 for x64-based Systems:
https://support.microsoft.com/kb/3198585
Windows 10 Version 1511 for 32-bit Systems:
https://support.microsoft.com/kb/3198586
Windows 10 Version 1511 for x64-based Systems:
https://support.microsoft.com/kb/3198586
Windows 10 Version 1607 for 32-bit Systems:
https://support.microsoft.com/kb/3200970
Windows 10 Version 1607 for x64-based Systems:
https://support.microsoft.com/kb/3200970
Windows Server 2016 for x64-based Systems:
https://support.microsoft.com/kb/3200970

Vulnerable software versions

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External links
https://technet.microsoft.com/library/security/MS16-129

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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, proof of concept for this vulnerability is available.