SB2025052193 - Lenovo update for TianoCore EDK II BIOS

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Integer overflow (CVE-ID: CVE-2022-36763)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to integer overflow within the Tcg2MeasureGptTable() function when reading untrusted input from the disk. A local user can set up a malicious GPT table to trigger an integer overflow and overwrite code from UEFI applications.

2) Integer overflow (CVE-ID: CVE-2022-36764)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer overflow within the Tcg2MeasurePeImage() function. A remote attacker can pass specially crafted data to the application, trigger an integer overflow and execute arbitrary code on the target system.

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

3) Integer overflow (CVE-ID: CVE-2022-36765)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to integer overflow within the CreateHob() function. A local user can trigger an integer overflow and execute arbitrary code on the target system.

Remediation

Install update from vendor's website.

References

• https://support.lenovo.com/us/en/product_security/LEN-115697