Insecure Default Variable Initialization in Insyde NvmExpressDxe driver

1) Insecure Default Variable Initialization

EUVDB-ID: #VU60265

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2021-41839

CWE-ID: CWE-453 - Insecure Default Variable Initialization

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to the SMM (System Management Mode) branch that registers a SWSMI handler does not sufficiently check or validate the allocated table variable EFI_BOOT_SERVICES. A remote attacker can overwrite address location of any of the functions and execute arbitrary code on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

NvmExpressDxe: before 5.1: 05.16.25

CPE2.3

• cpe:2.3:h:insyde_software:nvmexpressdxe:*:*:*:*:*:*:*:*

External links

https://www.insyde.com/security-pledge

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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