Privilege escalation in Microsoft splwow64

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU22707

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-1380

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

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to the way the splwow64.exe handles certain calls. A local user can elevate privileges on an affected system from low-integrity to medium-integrity.

Note: This vulnerability by itself does not allow arbitrary code execution; however, it could allow arbitrary code to be run if the attacker uses it in combination with another vulnerability.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows Server: 2012 - 2019 1903

Windows: 8.1 - 10 1903

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1380

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.