Privilege escalation in Microsoft RemoteFX Virtual GPU miniport driver

1) Buffer overflow

EUVDB-ID: #VU15870

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-8471

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a local user to execute arbitrary code on the target system with elevated privileges.

The vulnerability exists due to a boundary error within the Microsoft RemoteFX Virtual GPU miniport driver. A local unprivileged user can run a specially crafted application on the affected system and execute arbitrary code with elevated privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows: 7 - 10 1809 10.0.17763.1

Windows Server: 2016 10.0.14393.10 - 2019 10.0.17763.1

CPE2.3

• cpe:2.3:o:microsoft:windows:*:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:8.1:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:10_1607:10.0.14393.10:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:10_1703:10.0.15063.138:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:10_1709:10.0.16299.19:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:10_1803:10.0.17134.48:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:2016:10.0.14393.10:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:2019:10.0.17763.1:*:*:*:*:*:*

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8471

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.