# CVE-2020-10056: Privilege escalation in License Management Utility (LMU)

> A local authenticated attacker can execute arbitrary commands with SYSTEM privileges due to insecure configuration permissions in the License Management Utility.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Sep 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-wq4m-fcxw-965v

## What is CVE-2020-10056?

CVE-2020-10056 is a high-severity vulnerability in Siemens AG License Management Utility (LMU), published on 9 Sep 2020. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability has been identified in License Management Utility (LMU) (All versions < V2.4). The lmgrd service of the affected application is executed with local SYSTEM privileges on the server while its configuration can be modified by local users. The vulnerability could allow a local authenticated attacker to execute arbitrary commands on the server with local SYSTEM privileges.

Weakness: CWE-269 (Improper Privilege Management), CWE-250 (Execution with Unnecessary Privileges)

## Which versions are affected by CVE-2020-10056?

It affects 1 product.


Products: Siemens License Management Utility.

## How do I fix CVE-2020-10056?

No fix has been published for CVE-2020-10056 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-10056 being exploited?

There is no known exploitation of CVE-2020-10056 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-10056 and fix it if it is affected.

What it is: CVE-2020-10056 is a high-severity vulnerability in Siemens AG License Management Utility (LMU), published on 9 Sep 2020. 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-2020-10056 in the wild and no public exploit code.

Affected product: Siemens AG License Management Utility (LMU). 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-2020-10056/ (Markdown: https://insights.sbomify.com/CVE-2020-10056/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-10056
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-10056
- OSV: https://osv.dev/vulnerability/CVE-2020-10056

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-10056/
Summaries are generated and may contain mistakes; the official description above is the record.