Privilege escalation in Microsoft Windows Win32k

Published: 2018-08-14

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2018-8404 CVE-2018-8399
CWE-ID	CWE-119
Exploitation vector	Local
Public exploit	N/A
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) Memory corruption

EUVDB-ID: #VU14380

Risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-8404

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to improper handling of objects in memory by the Win32k component. A local attacker can run a specially crafted application, trigger memory corruption and execute arbitrary code in kernel mode.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows: 7 - 10

Windows Server: 2008 R2 - 2016 10.0.14393.10

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8404

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) Memory corruption

EUVDB-ID: #VU14382