#VU80872 Out-of-bounds write in Insyde Kernel - CVE-2022-35895

Vulnerability identifier: #VU80872

Vulnerability risk: Low

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-35895

CWE-ID: CWE-787

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Insyde Kernel
Operating systems & Components / Operating system

Vendor: Insyde Software

Description

The vulnerability allows a local user to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input in SMM driver (SMRAM write) in InsydeH2O. A local administrator can trigger an out-of-bounds write and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Insyde Kernel: before 5.0

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External links
https://binarly.io/advisories/BRLY-2022-024/index.html
https://www.insyde.com/security-pledge/SA-2022033
https://www.insyde.com/security-pledge

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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.