# CVE-2019-18339: Auth bypass in SiNVR/SiVMS Video Server

> Remote attackers can bypass authentication to read the user database and obtain cleartext passwords on Siemens SiNVR/SiVMS Video Servers.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:U/RC:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 12 Dec 2019
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-372q-jmw9-5mw6

## What is CVE-2019-18339?

CVE-2019-18339 is a critical authentication bypass vulnerability in Siemens SiNVR/SiVMS Video Server, published on 12 Dec 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability has been identified in SiNVR/SiVMS Video Server (All versions < V5.0.0). The HTTP service (default port 5401/tcp) of the SiVMS/SiNVR Video Server
contains an authentication bypass vulnerability, even when properly
configured with enforced authentication.

A remote attacker with network access to the Video Server could 
exploit this vulnerability to read the SiVMS/SiNVR users database, including
the passwords of all users in obfuscated cleartext.

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2019-18339?

It affects 2 products.


Products: Siemens Sinvr 3 Central Control Server, Siemens Sinvr 3 Video Server.

## How do I fix CVE-2019-18339?

No fix has been published for CVE-2019-18339 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-18339 being exploited?

There is no known exploitation of CVE-2019-18339 in the wild and no public exploit code.

## Other vulnerabilities in Siemens SiNVR/SiVMS Video Server

- [CVE-2019-18337](https://insights.sbomify.com/CVE-2019-18337/): Auth bypass in Control Center Server (CCS) (critical 9.8)
- [CVE-2019-19292](https://insights.sbomify.com/CVE-2019-19292/): SQL injection in Control Center Server (CCS) (high 8.8)
- [CVE-2019-18338](https://insights.sbomify.com/CVE-2019-18338/): Path traversal in Control Center Server (CCS) (high 7.7)
- [CVE-2019-19297](https://insights.sbomify.com/CVE-2019-19297/): Path traversal in SiNVR/SiVMS Video Server (high 7.5)
- [CVE-2019-19296](https://insights.sbomify.com/CVE-2019-19296/): Path traversal in SiNVR/SiVMS Video Server (medium 6.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-18339 and fix it if it is affected.

What it is: CVE-2019-18339 is a critical authentication bypass vulnerability in Siemens SiNVR/SiVMS Video Server, published on 12 Dec 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-18339 in the wild and no public exploit code.

Affected product: Siemens SiNVR/SiVMS Video 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-2019-18339/ (Markdown: https://insights.sbomify.com/CVE-2019-18339/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-18339
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-18339
- OSV: https://osv.dev/vulnerability/CVE-2019-18339

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-18339/
Summaries are generated and may contain mistakes; the official description above is the record.