Scripting Engine Memory Corruption Vulnerability

1) Memory corruption

EUVDB-ID: #VU5077

Risk: Critical

CVSSv3.1: 9.2 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2016-0189

CWE-ID: CWE-119 - Memory corruption

Exploit availability: Yes

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 opening it, trigger memory corruption and execute arbitrary code.

Successful exploitation of the vulnerability results in arbitrary code execution on the vulnerable system.

Note: the vulnerability was being actively exploited.

Mitigation

Install updates from Microsoft website.

Vulnerable software versions

Microsoft JScript: 5.8

Microsoft Internet Explorer: 9 - 11

VBScript: 5.8

CPE2.3

• cpe:2.3:a:microsoft:microsoft_jscript:5.8:*:*:*:*:*:*:
• cpe:2.3:a:microsoft:microsoft_internet_explorer:9:*:*:*:*:*:*:
• cpe:2.3:a:microsoft:microsoft_internet_explorer:10:*:*:*:*:*:*:
• cpe:2.3:a:microsoft:microsoft_internet_explorer:11:*:*:*:*:*:*:
• cpe:2.3:a:microsoft:vbscript:5.8:*:*:*:*:*:*:

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2016-0189

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?

Yes. This vulnerability is being exploited in the wild.