#VU856 Memory corruption in Microsoft Edge - CVE-2016-7189

Vulnerability identifier: #VU856

Vulnerability risk: Critical

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:Red]

CVE-ID: CVE-2016-7189

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: Yes

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

Vendor: Microsoft

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

The weakness exists due to boundary error in the Scripting Engine when handling malicious files. A remote attacker can create a specially crafted content, trick the victim into downloading it, trigger memory corruption and execute arbitrary code.

Successful exploitation of the vulnerability will result in arbitrary code execution.

Note: the vulnerability was being actively exploited.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Microsoft Edge: All versions

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External links
https://technet.microsoft.com/en-us/library/security/ms16-119
https://threatpost.com/microsoft-patches-five-zero-days-under-attack/121211/

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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.