This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Windows JScript. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the implementation of the Array.concat method in JScript. By creating an out-of-memory condition, an attacker can trigger access to a pointer prior to initialization. An attacker can leverage this vulnerability to execute code in the context of the current process.