Insecure Default Variable Initialization in Insyde NvmExpressDxe driver

1) Insecure Default Variable Initialization

EUVDB-ID: #VU60265

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

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 5.5: 05.51.25

External links

http://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.