Zero-day vulnerability in GLWorld

Stack-based buffer overflow

The exploitation of this issue was detected by the DeepSight honeypot.

Vulnerability details

Advisory: SB2008050801 - Two remote code execution vulnerabilities in Ourgame GLWorld

Vulnerable component: GLWorld

CVE-ID:

CVSSv3 score: 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

CWE-ID: CWE-119 - Memory corruption

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.

External links:

http://www.guanting.com/security/bug/information/307.html
https://www.symantec.com/security_response/attacksignatures/detail.jsp?asid=50158
https://github.com/buffer/phoneyc/blob/master/samples/OurgameGLWorld.html

About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.