# CVE-2018-4849: Weak cryptography in Siveillance VMS Video for Android, Siveillance VMS Video for iOS

> Improper certificate validation allows attackers to intercept and modify encrypted traffic between the mobile app and server.

- **Severity:** High 7.4 (`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 May 2018
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-w8w5-8j49-56jc

## What is CVE-2018-4849?

CVE-2018-4849 is a high-severity vulnerability in Siemens AG Siveillance VMS Video for Android, Siveillance VMS Video for iOS, published on 3 May 2018. 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 Siveillance VMS Video for Android (All versions < V12.1a (2018 R1)), Siveillance VMS Video for iOS (All versions < V12.1a (2018 R1)). Improper certificate validation could allow an attacker in a privileged network position to read data from and write data to the encrypted communication channel between the app and a server. The security vulnerability could be exploited by an attacker in a privileged network position which allows intercepting the communication channel between the affected app and a server (such as Man-in-the-Middle). Furthermore, an attacker must be able to generate a certificate that results for the validation algorithm in a checksum identical to a trusted certificate. Successful exploitation requires no user interaction. The vulnerability could allow reading data from and writing data to the encrypted communication channel between the app and a server, impacting the communication's confidentiality and integrity. At the time of advisory publication no public exploitation of this security vulnerability was known. Siemens confirms the security vulnerability and provides mitigations to resolve the security issue.

Weakness: CWE-295 (Improper Certificate Validation)

## Which versions are affected by CVE-2018-4849?

It affects 1 product.


Products: Siemens Siveillance Vms Video.

## How do I fix CVE-2018-4849?

No fix has been published for CVE-2018-4849 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-4849 being exploited?

There is no known exploitation of CVE-2018-4849 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-4849 and fix it if it is affected.

What it is: CVE-2018-4849 is a high-severity vulnerability in Siemens AG Siveillance VMS Video for Android, Siveillance VMS Video for iOS, published on 3 May 2018. 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-2018-4849 in the wild and no public exploit code.

Affected product: Siemens AG Siveillance VMS Video for Android, Siveillance VMS Video for iOS. 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-2018-4849/ (Markdown: https://insights.sbomify.com/CVE-2018-4849/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-4849
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-4849
- OSV: https://osv.dev/vulnerability/CVE-2018-4849

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From sbomify Insights: https://insights.sbomify.com/CVE-2018-4849/
Summaries are generated and may contain mistakes; the official description above is the record.