Vulnerability identifier: #VU928

Vulnerability risk: Low

CVSSv3.1: 4.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2016-3387

CWE-ID: CWE-46

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Microsoft Internet Explorer
Client/Desktop applications / Web browsers
Microsoft Edge
Client/Desktop applications / Web browsers

Vendor: Microsoft

Description
The vulnerability allows a remote attacker to gain elevated privileges.

The weakness exists due to improper defense of private namespace by the browser. A remote attacker can create a specially crafted content, trick the victim into downloading it, gain privileged permissions to the namespace directory on the system.

Successful exploitation of the vulnerability will result in privilege escalation on the vulnerable system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Microsoft Internet Explorer: 10 - 11

Microsoft Edge:

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External links
http://technet.microsoft.com/en-us/library/security/ms16-118
http://technet.microsoft.com/en-us/library/security/ms16-119

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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.