#VU60269 Permissions, Privileges, and Access Controls in Int15ServiceSmm - CVE-2021-42060

Vulnerability identifier: #VU60269

Vulnerability 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-2021-42060

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Int15ServiceSmm
Hardware solutions / Drivers

Vendor: Insyde Software

Description

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to the SMM callout issue. A remote attacker can hijack execution flow of a code running in System Management Mode and escalate privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Int15ServiceSmm: before 5.0: 05.08.49

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External links
https://www.insyde.com/security-pledge/SA-2022007

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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.