(Pwn2Own) Microsoft Edge AudioBuffer Use-After-Free Information Disclosure Vulnerability

ID ZDI-17-328
Type zdi
Reporter Richard Zhu (fluorescence)
Modified 2017-05-10T00:00:00


This vulnerability allows remote attackers to disclose sensitive information on vulnerable installations of Microsoft Edge. 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 handling of AudioBuffer objects. By performing actions in JavaScript 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.