Zero-day vulnerability in Windows

Path traversal

The vulnerability was being used in CNACOM campaign targeting government organization in Taiwan.

Known malware:


Vulnerability details

Advisory: SB2015011301 - Privilege escalation in Microsoft Windows

Vulnerable component: Windows

CVE-ID: CVE-2015-0016

CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')


The vulnerability allows a remote attacker to gain elevated privileges on the target system.

The weakness exists due to insufficient validation of user-supplied input within TS WebProxy Windows component. A remote attacker can trick the victim into downloading a specially crafted file and execute it with privileges of the current user.  

Successful exploitation of the vulnerability may result in full control of the vulnerable system.

Note: the vulnerability was being actively exploited.

Known APT campaigns:

CNACOM campaign

The campaign mainly targeted Taiwanese organizations and supposedly has Chinese origin.

Public Exploits: