Out-of-bounds write in NVIDIA Windows GPU Display Driver

1) Out-of-bounds write

EUVDB-ID: #VU19990

Risk: High

CVSSv3.1: 8.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2019-5685

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input in the "NVWGF2UMX_CFG.DLL" driver in "DCL_INDEXABLETEMP" function. A remote attacker can create a specially crafted shader file, trigger out-of-bounds write and execute arbitrary code on the target system or perform a denial of service attack.

This vulnerability can be triggered from VMware guest, affecting VMware host.

Mitigation

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

Vulnerable software versions

NVIDIA Windows GPU Display Driver: All versions

External links

http://nvidia.custhelp.com/app/answers/detail/a_id/4841
http://www.talosintelligence.com/vulnerability_reports/TALOS-2019-0812

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to open a a specially crafted file.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.