Microsoft Windows SMB2 Out-Of-Bounds Access Information Disclosure Vulnerability

2018-10-10T00:00:00
ID ZDI-18-1135
Type zdi
Reporter Haikuo Xie of Baidu Security Lab
Modified 2018-06-22T00:00:00

Description

This vulnerability allows local attackers to escalate privileges on vulnerable installations of Microsoft Windows. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handling of SMB2 responses. The issue results from the lack of proper validation of user-supplied data, which can result in a memory access past the end of an allocated buffer. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of SYSTEM.