Privilege escalation in win32kfull.sys driver in Microsoft Windows



Published: 2021-01-29
Risk Low
Patch available NO
Number of vulnerabilities 1
CVE-ID N/A
CWE-ID CWE-476
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 one low risk vulnerability.

1) NULL pointer dereference

EUVDB-ID: #VU50138

Risk: Low

CVSSv3.1: 7.1 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:U/RC:C]

CVE-ID: N/A

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to a NULL pointer dereference error within the win32kfull.sys driver.. A local user can run a specially crafted program on the system, trigger a NULL pointer dereference error and execute arbitrary code with SYSTEM privileges.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Windows: 10 - 10 Mobile

Windows Server: 2012 - 2019 2004

External links

http://www.zerodayinitiative.com/advisories/ZDI-21-090/


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.



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