MS14-085  Vulnerability in Microsoft Graphics Component Could Allow Information Disclosure

2014-12-09 This security update resolves a publicly disclosed vulnerability in Microsoft Windows. The vulnerability could allow information disclosure if a user browses to a website containing specially crafted JPEG content. An attacker could use this information disclosure vulnerability to gain information about the system that could then be combined with other attacks to compromise the system. The information disclosure vulnerability by itself does not allow arbitrary code execution. However, an attacker could use this information disclosure vulnerability in conjunction with another vulnerability to bypass security features such as Address Space Layout Randomization (ASLR).
Vulnerabilities addressed in this bulletin:

Graphics Component Information Disclosure Vulnerability

An information disclosure vulnerability exists in the Microsoft Graphics Component that could allow an attacker to more reliably predict the memory offsets of specific instructions in a given call stack. The vulnerability is caused when the Microsoft Graphics Component improperly handles the decoding of JPEG images in memory. An attacker could use this information disclosure vulnerability to gain information about the system that could then be combined with other attacks to compromise the system. The information disclosure vulnerability by itself does not allow arbitrary code execution. However, an attacker could use this information disclosure vulnerability in conjunction with another vulnerability to bypass security features such as Address Space Layout Randomization (ASLR). The security update addresses the vulnerability by changing how memory is initialized and managed when JPEG images are decoded.
CVE-2014-6355

Bulletin details at Microsoft.com