Microsoft Windows VBScript Filter Function Use-After-Free Information Disclosure Vulnerability

ID ZDI-18-123
Type zdi
Reporter Anonymous
Modified 2018-01-18T00:00:00


This vulnerability allows remote attackers to disclose sensitive information on vulnerable installations of Microsoft Windows. 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 Filter function in VBScript. By performing actions in VBScript, an attacker can cause a pointer to be reused after it has been freed. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the current process.