#VU70677 Stack-based buffer overflow in ThinkPad X13s BIOS - CVE-2022-40520

Vulnerability identifier: #VU70677

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-40520

CWE-ID: CWE-121

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
ThinkPad X13s BIOS
Other software / Other software solutions

Vendor: Lenovo

Description

The vulnerability allows a local user to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error. A local user can trigger stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

ThinkPad X13s BIOS: before 1.47

---

External links
https://support.lenovo.com/us/en/product_security/LEN-103709

---

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.