# CVE-2018-12182: Privilege escalation in Extensible Firmware Interface Development Kit (EDK II)

> An authenticated local attacker can exploit insufficient memory checks in EDK II SMM to escalate privileges, disclose information, or cause denial of service.

- **Severity:** Medium 6.7 (`CVSS:3.0/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:** Yes
- **Published:** 27 Mar 2019
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-rq43-vgrv-48m9, UBUNTU-CVE-2018-12182

## What is CVE-2018-12182?

CVE-2018-12182 is a medium-severity vulnerability in Extensible Firmware Interface Development Kit (EDK II), published on 27 Mar 2019. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Insufficient memory write check in SMM service for EDK II may allow an authenticated user to potentially enable escalation of privilege, information disclosure and/or denial of service via local access.

Weakness: CWE-441 (Unintended Proxy or Intermediary)

## Which versions are affected by CVE-2018-12182?

It affects 1 product.


Products: Tianocore Edk Ii.

## How do I fix CVE-2018-12182?

Apply the vendor's patch.

## Is CVE-2018-12182 being exploited?

There is no known exploitation of CVE-2018-12182 in the wild and no public exploit code.

## Other vulnerabilities in Extensible Firmware Interface Development Kit (EDK II)

- [CVE-2018-12178](https://insights.sbomify.com/CVE-2018-12178/): Memory corruption in Extensible Firmware Interface Development Kit (EDK II) (critical 9.1)
- [CVE-2021-28216](https://insights.sbomify.com/CVE-2021-28216/): Memory corruption in EDK II (high 7.8)
- [CVE-2018-12179](https://insights.sbomify.com/CVE-2018-12179/): Privilege escalation in Extensible Firmware Interface Development Kit (EDK II) (high 7.8)
- [CVE-2018-3613](https://insights.sbomify.com/CVE-2018-3613/): Privilege escalation in Extensible Firmware Interface Development Kit (EDK II) (high 7.8)
- [CVE-2019-11098](https://insights.sbomify.com/CVE-2019-11098/): Other in Tianocore (medium 6.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-12182 and fix it if it is affected.

What it is: CVE-2018-12182 is a medium-severity vulnerability in Extensible Firmware Interface Development Kit (EDK II), published on 27 Mar 2019. 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-2018-12182 in the wild and no public exploit code.

Affected product: Extensible Firmware Interface Development Kit (EDK II). 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-2018-12182/ (Markdown: https://insights.sbomify.com/CVE-2018-12182/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-12182
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-12182
- OSV: https://osv.dev/vulnerability/CVE-2018-12182

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From sbomify Insights: https://insights.sbomify.com/CVE-2018-12182/
Summaries are generated and may contain mistakes; the official description above is the record.