Vulnerability identifier: #VU1323

Vulnerability risk: Critical

CVSSv3.1: 8.2 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Ourgame ActiveX control
Client/Desktop applications / Plugins for browsers, ActiveX components
GLWorld
Client/Desktop applications / Plugins for browsers, ActiveX components

Vendor: Ourgame

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

The weakness exists due to stack-based buffer overflow in ActiveX control. By persuading a victim to visit a specially Web page that passes an overly long argument to the IEStart() method or a second argument to the IEStartNative() method, a remote attacker can trigger memory corruption and execute arbitrary code on the target system with privileges of the current user.

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

Note: the vulnerability was being actively exploited.

Mitigation
Upgrade to the latest version of Ourgame ActiveX control (1.0.0.18 or later) bundled with Ourgame GLWorld (2.8.1.2beta), available from the vendor's website.
http://www.ourgame.com/download/

Vulnerable software versions

Ourgame ActiveX control: 1.0.0.15

GLWorld: 2.6.1.29 - 2.8.1.2 beta

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External links
http://www.symantec.com/security_response/attacksignatures/detail.jsp?asid=22935

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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.