# CVE-2023-45079: Information disclosure in BIOS

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

- **Severity:** Medium 6.7 (`CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 Nov 2023
- **Updated:** 4 Sep 2024
- **Also known as:** GHSA-xr7w-c4xp-gqc3

## What is CVE-2023-45079?

CVE-2023-45079 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 NvmramSmm SMM driver that may allow a local attacker with elevated privileges to write to NVRAM variables.

Weakness: CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2023-45079?

It affects 61 products.


Products: 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, Lenovo Ideacentre G5-14imb05 Firmware, Lenovo Ideacentre Gaming 5-14iob6 Firmware, Lenovo Ideacentre Mini 5-01imh05 Firmware, Lenovo Ideacentre Mini 5 01iaq7 Firmware, Lenovo Legion T7-34imz5 Firmware, Lenovo Thinkcentre M625q Firmware, Lenovo Thinkcentre M630e Firmware, Lenovo Thinkcentre M70a Firmware, Lenovo Thinkcentre M70c Firmware, Lenovo Thinkcentre M70q Firmware, Lenovo Thinkcentre M70s Firmware, Lenovo Thinkcentre M70t Firmware, Lenovo Thinkcentre M720q Firmware, Lenovo Thinkcentre M720s Firmware and 41 more.

## How do I fix CVE-2023-45079?

No fix has been published for CVE-2023-45079 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-45079 being exploited?

There is no known exploitation of CVE-2023-45079 in the wild and no public exploit code.

## Other vulnerabilities in Lenovo BIOS

- [CVE-2023-43567](https://insights.sbomify.com/CVE-2023-43567/): Memory corruption in Desktop BIOS (medium 6.7)
- [CVE-2023-43569](https://insights.sbomify.com/CVE-2023-43569/): Memory corruption in Desktop BIOS (medium 6.7)
- [CVE-2023-43570](https://insights.sbomify.com/CVE-2023-43570/): Code injection in Desktop BIOS (medium 6.7)
- [CVE-2023-43571](https://insights.sbomify.com/CVE-2023-43571/): Memory corruption in Desktop BIOS (medium 6.7)
- [CVE-2023-43573](https://insights.sbomify.com/CVE-2023-43573/): Memory corruption in Desktop BIOS (medium 6.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-45079 and fix it if it is affected.

What it is: CVE-2023-45079 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.
Exploitation: There is no known exploitation of CVE-2023-45079 in the wild and no public exploit code.

Affected product: Lenovo BIOS. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2023-45079/ (Markdown: https://insights.sbomify.com/CVE-2023-45079/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-45079
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-45079
- OSV: https://osv.dev/vulnerability/CVE-2023-45079

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-45079/
Summaries are generated and may contain mistakes; the official description above is the record.