Privilege escalation in Windows Desktop Bridge

Published: 2018-03-13

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2018-0877 CVE-2018-0880
CWE-ID	CWE-264
Exploitation vector	Local
Public exploit	Public exploit code for vulnerability #2 is available.
Vulnerable software Subscribe	Windows Operating systems & Components / Operating system Windows Server Operating systems & Components / Operating system
Vendor	Microsoft

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Privilege escalation

EUVDB-ID: #VU11059

Risk: Low

CVSSv3.1: 6.4 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-0877

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

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

The weakness exists due to the Desktop Bridge VFS does not take into acccount user/kernel mode when managing file paths. A local attacker can run a specially crafted application and gain system privileges to perform further attacks.

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-2018-0877

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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

2) Privilege escalation

EUVDB-ID: #VU11061

Risk: Low

CVSSv3.1: 7.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-0880