# CVE-2020-28396: Weak cryptography in SICAM A8000 CP-8000

> An attacker in a privileged position can decrypt communications due to insecure cipher usage, compromising data confidentiality and integrity.

- **Severity:** High 7.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 14 Dec 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-gw3g-78vp-6j8f

## What is CVE-2020-28396?

CVE-2020-28396 is a high-severity vulnerability in Siemens SICAM A8000 CP-8000, published on 14 Dec 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

A vulnerability has been identified in SICAM A8000 CP-8000 (All versions < V16), SICAM A8000 CP-8021 (All versions < V16), SICAM A8000 CP-8022 (All versions < V16). A web server misconfiguration of the affected device can cause insecure ciphers usage by a user´s browser. An attacker in a privileged position could decrypt the communication and compromise confidentiality and integrity of the transmitted information.

Weakness: CWE-327 (Use of a Broken or Risky Cryptographic Algorithm), CWE-693 (Protection Mechanism Failure)

## Which versions are affected by CVE-2020-28396?

It affects 3 products.


Products: Siemens Sicam A8000 Cp-8000 Firmware, Siemens Sicam A8000 Cp-8021 Firmware, Siemens Sicam A8000 Cp-8022 Firmware.

## How do I fix CVE-2020-28396?

No fix has been published for CVE-2020-28396 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-28396 being exploited?

There is no known exploitation of CVE-2020-28396 in the wild and no public exploit code.

## Other vulnerabilities in Siemens SICAM A8000 CP-8000

- [CVE-2022-29884](https://insights.sbomify.com/CVE-2022-29884/): Denial of service in CP-8000 MASTER MODULE WITH I/O -25/+70°C (high 7.5)
- [CVE-2018-13798](https://insights.sbomify.com/CVE-2018-13798/): Denial of service in SICAM A8000 CP-8000, SICAM A8000 CP-802X, SICAM A8000 CP-8050 (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-28396 and fix it if it is affected.

What it is: CVE-2020-28396 is a high-severity vulnerability in Siemens SICAM A8000 CP-8000, published on 14 Dec 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2020-28396 in the wild and no public exploit code.

Affected product: Siemens SICAM A8000 CP-8000. 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-2020-28396/ (Markdown: https://insights.sbomify.com/CVE-2020-28396/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-28396
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-28396
- OSV: https://osv.dev/vulnerability/CVE-2020-28396

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-28396/
Summaries are generated and may contain mistakes; the official description above is the record.