#VU14407 Security restrictions bypass in Windows and Windows Server


Published: 2018-08-14 | Updated: 2018-08-14

Vulnerability identifier: #VU14407

Vulnerability risk: Low

CVSSv3.1: 4 [CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-8253

CWE-ID: CWE-264

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Windows
Operating systems & Components / Operating system
Windows Server
Operating systems & Components / Operating system

Vendor: Microsoft

Description

The vulnerability allows a local attacker to bypass lockscreen.

The vulnerability exists within Microsoft Cortana code that allows arbitrary website browsing on the lockscreen. A user with physical access to device can access vimctim's browser and steal browser stored passwords or log on to websites as another user.

Successful exploitation of the vulnerability requires access to the console and the system must have Microsoft Cortana assistance enabled.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Windows: 10

Windows Server: 2016

External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8253

Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.


Latest bulletins with this vulnerability


Windows lockscreen bypass in Cortana