Zero-day vulnerability in Windows

Improper input validation

The vulnerability was highly exploited by advanced adversary group named HURRICANE PANDA.

Vulnerability details

Advisory: SB2014101402 - Remote code execution in Microsoft Windows

Vulnerable component: Windows

CVE-ID: CVE-2014-4148

CVSSv3 score: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C

CWE-ID: CWE-20 - Improper Input Validation


The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The weakness exists due to improper input validation when processing TrueType fonts in kernel-mode driver (win32k.sys). A remote attacker can create a specially crafted font file, place it on a web page, trick the victim into visiting it, trigger memory corruption and execute arbitrary code with privileges of the current user.

Successful exploitation of the vulnerability results in arbitrary code execution on the vulnerable system.

Note: the vulnerability was being actively exploited.

Known APT campaigns:

Hurricane Panda

Hurricane Panda is an attack targeting major infrastructure companies.

Attack was detected in 2013 and is believed to be of Chinese origin.