Microsoft Chakra Array.splice Use-After-Free Remote Code Execution Vulnerability

2018-07-12T00:00:00
ID ZDI-18-611
Type zdi
Reporter Simon Zuckerbraun of Trend Micro Zero Day Initiative
Modified 2018-06-22T00:00:00

Description

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Chakra. 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.splice method. By performing actions in JavaScript, an attacker can cause a pointer to be reused after it has been freed. An attacker can leverage this vulnerability to execute code under the context of the current process.