# CVE-2019-10940: Privilege escalation in SINEMA Server

> A low-privileged attacker can exploit incorrect session validation to perform administrative operations like firmware updates on connected devices.

- **Severity:** Critical 9.9 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Jan 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-8vxr-h2m2-wf68

## What is CVE-2019-10940?

CVE-2019-10940 is a critical vulnerability in Siemens AG SINEMA Server, published on 16 Jan 2020. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability has been identified in SINEMA Server (All versions < V14.0 SP2 Update 1). Incorrect session validation could allow an attacker with a valid session, with low privileges, to perform firmware updates and other administrative operations on connected devices. The security vulnerability could be exploited by an attacker with network access to the affected system. An attacker must have access to a low privileged account in order to exploit the vulnerability. An attacker could use the vulnerability to compromise confidentiality, integrity, and availability of the affected system and underlying components. At the time of advisory publication no public exploitation of this security vulnerability was known.

Weakness: CWE-269 (Improper Privilege Management), CWE-266 (Incorrect Privilege Assignment)

## Which versions are affected by CVE-2019-10940?

It affects 1 product.


Products: Siemens Sinema Server.

## How do I fix CVE-2019-10940?

No fix has been published for CVE-2019-10940 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-10940 being exploited?

There is no known exploitation of CVE-2019-10940 in the wild and no public exploit code.

## Other vulnerabilities in Siemens AG SINEMA Server

- [CVE-2014-2731](https://insights.sbomify.com/CVE-2014-2731/): Code injection in n/a (critical 9.3)
- [CVE-2023-35796](https://insights.sbomify.com/CVE-2023-35796/): Cross-site scripting in SINEMA Server V14 (high 8.3)
- [CVE-2016-6486](https://insights.sbomify.com/CVE-2016-6486/): Privilege escalation in n/a (high 7.8)
- [CVE-2019-10941](https://insights.sbomify.com/CVE-2019-10941/): Missing authorization in SINEMA Server (medium 5.3)
- [CVE-2014-2732](https://insights.sbomify.com/CVE-2014-2732/): Path traversal in n/a (medium 5.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-10940 and fix it if it is affected.

What it is: CVE-2019-10940 is a critical vulnerability in Siemens AG SINEMA Server, published on 16 Jan 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-10940 in the wild and no public exploit code.

Affected product: Siemens AG SINEMA Server. 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-2019-10940/ (Markdown: https://insights.sbomify.com/CVE-2019-10940/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-10940
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-10940
- OSV: https://osv.dev/vulnerability/CVE-2019-10940

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From sbomify Insights: https://insights.sbomify.com/CVE-2019-10940/
Summaries are generated and may contain mistakes; the official description above is the record.