#VU80862 Time-of-check Time-of-use (TOCTOU) Race Condition in Insyde Kernel - CVE-2022-32477

Vulnerability identifier: #VU80862

Vulnerability risk: Low

CVSSv4.0: 4.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-32477

CWE-ID: CWE-367

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 escalate privileges on the system.

The vulnerability exists due to a time-of-check, time-of-use (TOCTOU) race condition in InsydeH2O. A local user can gain elevated privileges on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Insyde Kernel: before 5.2 05.27.27

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External links
https://www.insyde.com/security-pledge
https://www.insyde.com/security-pledge/SA-2023009

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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.