CVE-2023-45076 Information disclosure in BIOS

Medium 6.7 Published 8 Nov 2023 Updated 4 Sep 2024

A local attacker with elevated privileges can exploit a memory leak in the Lenovo BIOS DXE driver to read and write NVRAM variables.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-45076?

CVE-2023-45076 is a medium-severity vulnerability in Lenovo BIOS, published on 8 Nov 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A memory leakage vulnerability was reported in the 534D0140 DXE driver that may allow a local attacker with elevated privileges to write to NVRAM variables.

Weakness: CWE-125

Which versions are affected by CVE-2023-45076?

It affects 61 products.

Products include Lenovo Ideacentre 3-07ada05 Firmware, Lenovo Ideacentre 3-07imb05 Firmware, Lenovo Ideacentre 5-14iob6 Firmware, Lenovo Ideacentre C5-14imb05 Firmware, Lenovo Ideacentre Creator 5-14iob6 Firmware, Lenovo Ideacentre G5-14amr05 Firmware and 55 more.

How do I fix CVE-2023-45076?

No fix has been published for CVE-2023-45076 yet. Limit exposure of the affected software until one is available.

Is CVE-2023-45076 being exploited?

There is no known exploitation of CVE-2023-45076 in the wild and no public exploit code.

Sources

Also known as GHSA-xwr9-j862-6mj9.