Microsoft Internet Explorer Cumulative Security Update

Last Update Date: 14 Oct 2015 10:20 Release Date: 14 Oct 2015 3928 Views

RISK: High Risk

TYPE: Clients - Browsers

Multiple Internet Explorer Memory Corruption Vulnerabilities
Remote code execution vulnerabilities exist when Internet Explorer improperly accesses objects in memory. These vulnerabilities could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user.
Multiple Scripting Engine Memory Corruption Vulnerabilities
Remote code execution vulnerabilities exist in the way that the VBScript and JScript engines, when handling objects in memory in Internet Explorer, render. In a web-based attack scenario, an attacker could host a specially crafted website that is designed to exploit the vulnerabilities through Internet Explorer and then convince a user to view the website. An attacker could also embed an ActiveX control marked "safe for initialization" in an application or Microsoft Office document that hosts the IE rendering engine. The attacker could also take advantage of compromised websites, and websites that accept or host user-provided content or advertisements. These websites could contain specially crafted content that could exploit the vulnerabilities.
Multiple Internet Explorer Elevation of Privilege Vulnerabilities
Elevation of privilege vulnerabilities exist when Internet Explorer does not properly validate permissions under specific conditions, potentially allowing a script to be run with elevated privileges.
Multiple Internet Explorer Information Disclosure Vulnerabilities
Information disclosure vulnerabilities exist when Internet Explorer improperly discloses the contents of its memory, which could provide an attacker with information to further compromise the user's computer.
VBScript and JScript ASLR Bypass
A security feature bypass exists when the VBScript and JScript engines fail to use the Address Space Layout Randomization (ASLR) security feature, allowing an attacker to more reliably predict the memory offsets of specific instructions in a given call stack. The security feature bypass by itself does not allow arbitrary code execution. However, an attacker could use the ASLR bypass in conjunction with another vulnerability, such as a remote code execution vulnerability, that could take advantage of the ASLR bypass to more reliably run arbitrary code on a target system.
Scripting Engine Information Disclosure Vulnerability
An information disclosure vulnerability exists when JScript or VBScript improperly discloses the contents of its memory, which could provide an attacker with information to further compromise the user's computer or data.