Use-after-free in Windows and Windows Server

#VU65177 Use-after-free in Windows and Windows Server

Published: 2022-07-12 | Updated: 2022-07-13

Vulnerability identifier: #VU65177

Vulnerability 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-2022-22034

CWE-ID: CWE-416

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 user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error in multiple methods within the win32kfull driver in Microsoft Windows. A local user can run a specially crafted program to trigger a use-after-free error and execute arbitrary code with SYSTEM privileges.

List of vulnerable methods:

UMPDDrvStretchBltROP
UMPDDrvAlphaBlend
UMPDDrvCopyBits
UMPDDrvStretchBlt
UMPDDrvPlgBlt
UMPDDrvTransparentBlt
UMPDDrvBitBlt
UMPDDrvStrokePath
UMPDDrvGradientFill
UMPDDrvTextOut

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Windows: 10 - 10 S, 11 - 11 21H2, 7 - 7 SP1, 8.1 - 8.1 RT, 8 - 8 RT

Windows Server: 2003 - 2022 20H2

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.

Latest bulletins with this vulnerability

Multiple vulnerabilities in Dell products

Multiple vulnerabilities in Microsoft Windows Graphics Component