# CVE-2021-27392: Hardcoded credentials in Siveillance Video Open Network Bridge

> An authenticated remote attacker can retrieve and decrypt stored user credentials due to a hard-coded encryption key in the Open Network Bridge.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/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:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 22 Apr 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-5346-4j79-hf8j

## What is CVE-2021-27392?

CVE-2021-27392 is a high-severity vulnerability in Siemens Siveillance Video Open Network Bridge, published on 22 Apr 2021. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability has been identified in Siveillance Video Open Network Bridge (2020 R3), Siveillance Video Open Network Bridge (2020 R2), Siveillance Video Open Network Bridge (2020 R1), Siveillance Video Open Network Bridge (2019 R3), Siveillance Video Open Network Bridge (2019 R2), Siveillance Video Open Network Bridge (2019 R1), Siveillance Video Open Network Bridge (2018 R3), Siveillance Video Open Network Bridge (2018 R2). Affected Open Network Bridges store user credentials for the authentication between ONVIF clients and ONVIF server using a hard-coded key. The encrypted credentials can be retrieved via the MIP SDK. This could allow an authenticated remote attacker to retrieve and decrypt all credentials stored on the ONVIF server.

Weakness: CWE-798 (Use of Hard-coded Credentials), CWE-321 (Use of Hard-coded Cryptographic Key)

## Which versions are affected by CVE-2021-27392?

It affects 1 product.


Products: Siemens Siveillance Video Open Network Bridge.

## How do I fix CVE-2021-27392?

No fix has been published for CVE-2021-27392 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-27392 being exploited?

There is no known exploitation of CVE-2021-27392 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-27392 and fix it if it is affected.

What it is: CVE-2021-27392 is a high-severity vulnerability in Siemens Siveillance Video Open Network Bridge, published on 22 Apr 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-27392 in the wild and no public exploit code.

Affected product: Siemens Siveillance Video Open Network Bridge. 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-2021-27392/ (Markdown: https://insights.sbomify.com/CVE-2021-27392/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-27392
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-27392
- OSV: https://osv.dev/vulnerability/CVE-2021-27392

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-27392/
Summaries are generated and may contain mistakes; the official description above is the record.