Privilege escalation in Microsoft Windows

Published: 2015-01-13 | Updated: 2017-02-01
Severity Critical
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2015-0016
CWE ID CWE-22
Exploitation vector Network
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software Windows Subscribe
Windows Server
Vendor Microsoft

Security Advisory

This security advisory describes one critical risk vulnerability.

1) Path traversal

Severity: Critical

CVSSv3: 8.9 [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] [PCI]

CVE-ID: CVE-2015-0016

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

Description

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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Windows: 7, 8, 8.1, RT, RT 8.1, Vista

Windows Server: 2008 R2, 2012, 2012 R2

CPE External links

https://technet.microsoft.com/en-us/library/security/ms15-004

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.